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authorDavid Robillard <d@drobilla.net>2020-06-21 18:50:55 +0200
committerDavid Robillard <d@drobilla.net>2021-03-08 23:36:35 -0500
commit18fcbc74f3b4d5452420bd108894624876ade27f (patch)
tree98b984eb4c3560fe2d32e357956460dd1c7c5668 /bindings
parentdc5ccf0913fe716059bb633d8a183cbddc634a7a (diff)
downloadserd-18fcbc74f3b4d5452420bd108894624876ade27f.tar.gz
serd-18fcbc74f3b4d5452420bd108894624876ade27f.tar.bz2
serd-18fcbc74f3b4d5452420bd108894624876ade27f.zip
WIP: Add Python bindings
Diffstat (limited to 'bindings')
-rw-r--r--bindings/python/_static/custom.css35
-rw-r--r--bindings/python/_static/serd.svg135
-rw-r--r--bindings/python/conf.py112
-rw-r--r--bindings/python/index.rst11
-rw-r--r--bindings/python/meson.build51
-rw-r--r--bindings/python/overview.rst619
-rw-r--r--bindings/python/reference.rst8
-rw-r--r--bindings/python/serd.pyx2315
-rw-r--r--bindings/python/test_serd.py1132
9 files changed, 4418 insertions, 0 deletions
diff --git a/bindings/python/_static/custom.css b/bindings/python/_static/custom.css
new file mode 100644
index 00000000..9542e3be
--- /dev/null
+++ b/bindings/python/_static/custom.css
@@ -0,0 +1,35 @@
+div.document {
+ margin : 0
+}
+
+div.body {
+ margin-top : 2em
+}
+
+div.sphinxsidebarwrapper {
+ background : #EEE
+}
+
+div.sphinxsidebarwrapper p.blurb {
+ text-align : center
+}
+
+img.logo {
+ width : 6em
+}
+
+.class {
+ padding-top : 1.5em
+}
+
+.exception {
+ padding-top : 1.5em
+}
+
+.function {
+ padding-top : 1.5em
+}
+
+.method {
+ padding-top : 0.75em
+}
diff --git a/bindings/python/_static/serd.svg b/bindings/python/_static/serd.svg
new file mode 100644
index 00000000..6682c2e2
--- /dev/null
+++ b/bindings/python/_static/serd.svg
@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
+ sodipodi:docname="serd.svg"
+ width="33.866669mm"
+ height="33.866669mm"
+ viewBox="0 0 33.866668 33.866668"
+ version="1.1"
+ id="svg8">
+ <sodipodi:namedview
+ inkscape:current-layer="svg8"
+ inkscape:window-maximized="0"
+ inkscape:window-y="48"
+ inkscape:window-x="12"
+ inkscape:cy="62.700126"
+ inkscape:cx="-7.2291926"
+ inkscape:zoom="4.2953355"
+ fit-margin-bottom="0"
+ fit-margin-right="0"
+ fit-margin-left="0"
+ fit-margin-top="0"
+ showgrid="false"
+ id="namedview26"
+ inkscape:window-height="2100"
+ inkscape:window-width="3816"
+ inkscape:pageshadow="2"
+ inkscape:pageopacity="0"
+ guidetolerance="10"
+ gridtolerance="10"
+ objecttolerance="10"
+ borderopacity="1"
+ bordercolor="#666666"
+ pagecolor="#ffffff" />
+ <defs
+ id="defs2" />
+ <metadata
+ id="metadata5">
+ <rdf:RDF>
+ <cc:Work
+ rdf:about="">
+ <dc:format>image/svg+xml</dc:format>
+ <dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+ <dc:title></dc:title>
+ </cc:Work>
+ </rdf:RDF>
+ </metadata>
+ <path
+ d="M 26.726105,7.1405637 H 33.25462 V 0.61204813 h -6.528515 z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path889" />
+ <path
+ d="M 26.726105,7.1405637 H 33.25462 V 0.61204813 h -6.528515 z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path891" />
+ <path
+ d="m 13.669077,7.1405637 h 6.528516 V 0.61204813 h -6.528516 z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path893" />
+ <path
+ d="m 13.669077,7.1405637 h 6.528516 V 0.61204813 h -6.528516 z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path895" />
+ <path
+ d="M 0.61204754,7.1405637 H 7.1405623 V 0.61204813 H 0.61204754 Z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path897" />
+ <path
+ d="M 0.61204754,7.1405637 H 7.1405623 V 0.61204813 H 0.61204754 Z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path899" />
+ <path
+ d="M 26.726105,33.254621 H 33.25462 V 26.726109 H 26.726105 Z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path901" />
+ <path
+ d="M 26.726105,33.254621 H 33.25462 V 26.726109 H 26.726105 Z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path903" />
+ <path
+ d="m 13.669077,33.254621 h 6.528516 v -6.528512 h -6.528516 z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path905" />
+ <path
+ d="m 13.669077,33.254621 h 6.528516 v -6.528512 h -6.528516 z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path907" />
+ <path
+ d="M 0.61204754,33.254621 H 7.1405623 V 26.726109 H 0.61204754 Z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path909" />
+ <path
+ d="M 0.61204754,33.254621 H 7.1405623 V 26.726109 H 0.61204754 Z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path911" />
+ <path
+ d="m 13.669077,20.197594 h 6.528516 v -6.528515 h -6.528516 z"
+ style="fill:#ffffff;fill-opacity:1;fill-rule:evenodd;stroke:#444444;stroke-width:1.05833325;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path913" />
+ <path
+ d="m 13.669077,20.197594 h 6.528516 v -6.528515 h -6.528516 z"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path915" />
+ <path
+ d="m 20.197593,3.8763056 h 6.528512"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path917" />
+ <path
+ d="M 7.1405623,3.8763056 H 13.669077"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path919" />
+ <path
+ d="M 7.1405623,7.1405637 13.669077,13.669079"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path921" />
+ <path
+ d="m 20.197593,20.197594 6.528512,6.528515"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path923" />
+ <path
+ d="M 7.1405623,29.990363 H 13.669077"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path925" />
+ <path
+ d="m 20.197593,29.990363 h 6.528512"
+ style="fill:none;stroke:#444444;stroke-width:1.05833325;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+ id="path927" />
+</svg>
diff --git a/bindings/python/conf.py b/bindings/python/conf.py
new file mode 100644
index 00000000..a9dd564e
--- /dev/null
+++ b/bindings/python/conf.py
@@ -0,0 +1,112 @@
+import os
+import sys
+
+
+from unittest.mock import Mock as MagicMock
+
+sys.path.insert(0, os.path.abspath("../../build/bindings/python"))
+
+
+class Mock(MagicMock):
+ @classmethod
+ def __getattr__(cls, name):
+ return MagicMock()
+
+
+MOCK_MODULES = ["cython", "libc.stdint"]
+sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
+
+
+# Project information
+
+project = "Serd"
+copyright = "2020, David Robillard"
+author = "David Robillard"
+release = "0.0.0" # FIXME
+
+
+# General configuration
+
+exclude_patterns = ["xml", "_build", "Thumbs.db", ".DS_Store"]
+language = "en"
+nitpicky = True
+pygments_style = "friendly"
+
+extensions = [
+ "sphinx.ext.autodoc",
+ "sphinx.ext.doctest",
+]
+
+
+# HTML output
+
+try:
+ import sphinx_lv2_theme
+
+ have_lv2_theme = True
+except ModuleNotFoundError:
+ have_lv2_theme = False
+
+html_copy_source = False
+html_short_title = "Serd"
+html_static_path = ["../../doc/_static"]
+html_theme = "sphinx_lv2_theme"
+
+if have_lv2_theme:
+ html_theme = "sphinx_lv2_theme"
+
+ if tags.has("singlehtml"):
+ html_sidebars = {
+ "**": [
+ "globaltoc.html",
+ ]
+ }
+
+ html_theme_options = {
+ "body_max_width": "48em",
+ "body_min_width": "48em",
+ "description": "A lightweight library for working with RDF",
+ "show_footer_version": True,
+ "show_logo_version": False,
+ "logo": "serd.svg",
+ "logo_name": True,
+ "logo_width": "8em",
+ "nosidebar": False,
+ "page_width": "80em",
+ "sidebar_width": "18em",
+ "globaltoc_maxdepth": 3,
+ "globaltoc_collapse": False,
+ }
+
+ else:
+ html_theme_options = {
+ "body_max_width": "60em",
+ "body_min_width": "40em",
+ "description": "A lightweight library for working with RDF",
+ "show_footer_version": True,
+ "show_logo_version": False,
+ "logo": "serd.svg",
+ "logo_name": True,
+ "logo_width": "8em",
+ "nosidebar": True,
+ "page_width": "60em",
+ "sidebar_width": "14em",
+ "globaltoc_maxdepth": 1,
+ "globaltoc_collapse": True,
+ }
+
+else:
+
+ html_theme = "alabaster"
+
+ html_theme_options = {
+ "body_max_width": "60em",
+ "body_min_width": "40em",
+ "description": "A lightweight library for working with RDF",
+ "logo": "serd.svg",
+ "logo_name": True,
+ "page_width": "60em",
+ "sidebar_width": "14em",
+ "globaltoc_maxdepth": 1,
+ "globaltoc_collapse": True,
+ }
diff --git a/bindings/python/index.rst b/bindings/python/index.rst
new file mode 100644
index 00000000..d939ed49
--- /dev/null
+++ b/bindings/python/index.rst
@@ -0,0 +1,11 @@
+#########################
+Serd Python Documentation
+#########################
+
+.. toctree::
+
+ overview
+ reference
+
+:ref:`genindex`
+:ref:`modindex`
diff --git a/bindings/python/meson.build b/bindings/python/meson.build
new file mode 100644
index 00000000..42e02a10
--- /dev/null
+++ b/bindings/python/meson.build
@@ -0,0 +1,51 @@
+srcdir = meson.current_source_dir()
+blddir = meson.current_build_dir()
+
+if cc.get_id() == 'clang' or cc.get_id() == 'gcc'
+ cython_c_args = ['-Wno-unused-variable']
+endif
+
+# Generate extension module C source code with cython
+pyserd_c = custom_target('serd.cpython.so',
+ command: [cython, '@INPUT0@', '-o', '@OUTPUT@'],
+ input: ['serd.pyx'],
+ output: 'pyserd.c',
+ install: true,
+ install_dir: py.get_install_dir())
+
+# Compile extension module
+pyserd = py.extension_module('serd',
+ pyserd_c,
+ c_args: cython_c_args,
+ dependencies: [py_dep, serd_dep])
+
+# Set up an environment for loading the module from the build directory
+python_env = environment()
+python_env.set('PYTHONPATH', meson.current_build_dir())
+
+# Run API unit tests
+test('serd.py',
+ py,
+ args: ['-m', 'unittest', 'discover', '-b', '-v', srcdir],
+ env: python_env,
+ suite: ['python'])
+
+if sphinx_build.found()
+ # Test all code/output snippets in the documentation
+ test('doctest',
+ sphinx_build,
+ args: ['-M', 'doctest', srcdir, blddir],
+ suite: ['python'])
+
+ # Build HTML documentation from Python module
+ py_docs = custom_target(
+ 'singlehtml documentation for serd python bindings',
+ command: [sphinx_build, '-M', 'singlehtml',
+ srcdir, blddir,
+ '-E', '-q', '-t', 'singlehtml'],
+ input: [pyserd],
+ output: 'singlehtml',
+ build_by_default: true,
+ install: true,
+ install_dir: docdir / 'serd-0')
+endif
diff --git a/bindings/python/overview.rst b/bindings/python/overview.rst
new file mode 100644
index 00000000..c6bcc865
--- /dev/null
+++ b/bindings/python/overview.rst
@@ -0,0 +1,619 @@
+.. testsetup:: *
+
+ import serd
+
+========
+Overview
+========
+
+Serd is a lightweight C library for working with RDF data. This is the
+documentation for its Python bindings, which also serves as a gentle
+introduction to the basics of RDF.
+
+Serd is designed for high-performance or resource-constrained applications, and
+makes it possible to work with very large documents quickly and/or using
+minimal memory. In particular, it is dramatically faster than `rdflib
+<https://rdflib.readthedocs.io/en/stable/>`_, though it is less fully-featured
+and not pure Python.
+
+Nodes
+=====
+
+Nodes are the basic building blocks of data. Nodes are essentially strings:
+
+>>> print(serd.uri("http://example.org/something"))
+http://example.org/something
+
+>>> print(serd.string("hello"))
+hello
+
+>>> print(serd.decimal(1234))
+1234.0
+
+>>> len(serd.string("hello"))
+5
+
+However, nodes also have a :meth:`~serd.Node.type`, and optionally either a
+:meth:`~serd.Node.datatype` or :meth:`~serd.Node.language`.
+
+Representation
+--------------
+
+The string content of a node as shown above can be ambiguous. For example, it
+is impossible to tell a URI from a string literal using only their string
+contents. The :meth:`~serd.Node.to_syntax` method returns a complete
+representation of a node, in the `Turtle <https://www.w3.org/TR/turtle/>`_
+syntax by default:
+
+>>> print(serd.uri("http://example.org/something").to_syntax())
+<http://example.org/something>
+
+>>> print(serd.string("hello").to_syntax())
+"hello"
+
+>>> print(serd.decimal(1234).to_syntax())
+1234.0
+
+Note that the representation of a node in some syntax *may* be the same as the
+``str()`` contents which are printed, but this is usually not the case. For
+example, as shown above, URIs and strings are quoted differently in Turtle.
+
+A different syntax can be used by specifying one explicitly:
+
+>>> print(serd.decimal(1234).to_syntax(serd.Syntax.NTRIPLES))
+"1234.0"^^<http://www.w3.org/2001/XMLSchema#decimal>
+
+An identical node can be recreated from such a string using the
+:meth:`~serd.Node.from_syntax` method:
+
+>>> node = serd.decimal(1234)
+>>> copy = serd.Node.from_syntax(node.to_syntax()) # Don't actually do this
+>>> print(copy)
+1234.0
+
+Alternatively, the ``repr()`` builtin will return the Python construction
+representation:
+
+>>> repr(serd.decimal(1234))
+'serd.typed_literal("1234.0", "http://www.w3.org/2001/XMLSchema#decimal")'
+
+Any node can be round-tripped to and from a string using these methods. That
+is, for any node `n`, both::
+
+ serd.Node.from_syntax(n.to_syntax())
+
+and::
+
+ eval(repr(n))
+
+produce an equivalent node. Using the `to_syntax()` method is generally
+recommended, since it uses standard syntax.
+
+Primitives
+----------
+
+For convenience, nodes can be constructed from Python primitives by simply
+passing a value to the constructor:
+
+>>> repr(serd.Node(True))
+'serd.boolean(True)'
+>>> repr(serd.Node("hello"))
+'serd.string("hello")'
+>>> repr(serd.Node(1234))
+'serd.typed_literal("1234", "http://www.w3.org/2001/XMLSchema#integer")'
+>>> repr(serd.Node(12.34))
+'serd.typed_literal("1.234E1", "http://www.w3.org/2001/XMLSchema#double")'
+
+Note that it is not possible to construct every type of node this way, and care
+should be taken to not accidentally construct a string literal where a URI is
+desired.
+
+Fundamental Constructors
+------------------------
+
+As the above examples suggest, several node constructors are just convenience
+wrappers for more fundamental ones. All node constructors reduce to one of the
+following:
+
+ * :func:`serd.plain_literal` - A string with optional language, like
+ ``"hallo"@de`` in Turtle.
+
+ * :func:`serd.typed_literal` - A string with optional datatype, like
+ ``"1.2E9"^^xsd:float`` in Turtle.
+
+ * :func:`serd.blank` - A blank node, like "b42", which would be ``_:b42`` in
+ Turtle.
+
+ * :func:`serd.curie` - A compact URI, like "eg:name".
+
+ * :func:`serd.uri` - A URI, like "http://example.org", which would be
+ ``<http://example.org>`` in Turtle.
+
+Convenience Constructors
+------------------------
+
+ * :func:`serd.string` - A string literal with no language or datatype.
+ * :func:`serd.decimal` - An `xsd:decimal
+ <https://www.w3.org/TR/xmlschema-2/#decimal>`_ like "123.45".
+ * :func:`serd.double` - An `xsd:double
+ <https://www.w3.org/TR/xmlschema-2/#double>`_ like "1.2345E2".
+ * :func:`serd.float` - An `xsd:float
+ <https://www.w3.org/TR/xmlschema-2/#float>`_ like "1.2345E2".
+ * :func:`serd.integer` - An `xsd:integer
+ <https://www.w3.org/TR/xmlschema-2/#integer>`_ like "1234567".
+ * :func:`serd.boolean` - An `xsd:boolean
+ <https://www.w3.org/TR/xmlschema-2/#boolean>`_ like "true" or "false".
+ * :func:`serd.blob` - An `xsd:base64Binary
+ <https://www.w3.org/TR/xmlschema-2/#base64Binary>`_ like "aGVsbG8=".
+ * :func:`serd.file_uri` - A file URI like "file:///doc.ttl".
+
+Namespaces
+==========
+
+It is common to use many URIs that share a common prefix. The
+:class:`~serd.Namespace` utility class can be used to make code more readable
+and make mistakes less likely:
+
+>>> eg = serd.Namespace("http://example.org/")
+>>> print(eg.thing)
+http://example.org/thing
+
+.. testsetup:: *
+
+ eg = serd.Namespace("http://example.org/")
+
+Dictionary syntax can also be used:
+
+>>> print(eg["thing"])
+http://example.org/thing
+
+For convenience, namespaces also act like strings in many cases:
+
+>>> print(eg)
+http://example.org/
+>>> print(eg + "stringeyName")
+http://example.org/stringeyName
+
+Note that this class is just a simple syntactic convenience, it does not
+"remember" names and there is no corresponding C API.
+
+Statements
+==========
+
+A :class:`~serd.Statement` is a tuple of either 3 or 4 nodes: the subject,
+predicate, object, and optional graph. Statements declare that a subject has
+some property. The predicate identifies the property, and the object is its
+value.
+
+A statement is a bit like a very simple machine-readable sentence. The
+"subject" and "object" are as in natural language, and the predicate is like
+the verb, but more general. For example, we could make a statement in English
+about your intrepid author:
+
+ drobilla has the first name "David"
+
+We can break this statement into 3 pieces like so:
+
+.. list-table::
+ :header-rows: 1
+
+ * - Subject
+ - Predicate
+ - Object
+ * - drobilla
+ - has the first name
+ - "David"
+
+To make a :class:`~serd.Statement` out of this, we need to define some URIs. In
+RDF, the subject and predicate must be *resources* with an identifier (for
+example, neither can be a string). Conventionally, predicate names do not
+start with "has" or similar words, since that would be redundant in this
+context. So, we assume that ``http://example.org/drobilla`` is the URI for
+drobilla, and ``http://example.org/firstName`` has been defined somewhere to be
+a property with the appropriate meaning, and can make an equivalent
+:class:`~serd.Statement`:
+
+>>> print(serd.Statement(eg.drobilla, eg.firstName, serd.string("David")))
+<http://example.org/drobilla> <http://example.org/firstName> "David"
+
+If you find this terminology confusing, it may help to think in terms of
+dictionaries instead. For example, the above can be thought of as equivalent
+to::
+
+ drobilla[firstName] = "David"
+
+or::
+
+ drobilla.firstName = "David"
+
+Accessing Fields
+----------------
+
+Statement fields can be accessed via named methods or array indexing:
+
+>>> statement = serd.Statement(eg.s, eg.p, eg.o, eg.g)
+>>> print(statement.subject())
+http://example.org/s
+>>> print(statement[serd.Field.SUBJECT])
+http://example.org/s
+>>> print(statement[0])
+http://example.org/s
+
+Graph
+-----
+
+The graph field can be used as a context to distinguish otherwise identical
+statements. For example, it is often set to the URI of the document that the
+statement was loaded from:
+
+>>> print(serd.Statement(eg.s, eg.p, eg.o, serd.uri("file:///doc.ttl")))
+<http://example.org/s> <http://example.org/p> <http://example.org/o> <file:///doc.ttl>
+
+The graph field is always accessible, but may be ``None``:
+
+ >>> triple = serd.Statement(eg.s, eg.p, eg.o)
+ >>> print(triple.graph())
+ None
+ >>> quad = serd.Statement(eg.s, eg.p, eg.o, eg.g)
+ >>> print(quad.graph())
+ http://example.org/g
+
+World
+=====
+
+So far, we have only used nodes and statements, which are simple independent
+objects. Higher-level facilities in serd require a :class:`~serd.World` which
+represents the global library state.
+
+A program typically uses just one world, which can be constructed with no
+arguments::
+
+ world = serd.World()
+
+.. testsetup:: *
+
+ world = serd.World()
+
+Note that the world is not a database, it only manages a small amount of
+library state for things like configuration and logging.
+
+All "global" state is handle explicitly via the world. Serd does not contain
+any static mutable data, making it suitable for use in modules or plugins. If
+multiple worlds *are* used in a single program, they must never be mixed:
+objects "inside" one world can not be used with objects inside another.
+
+Generating Blanks
+-----------------
+
+Blank nodes, or simply "blanks", are used for resources that do not have URIs.
+Unlike URIs, they are not global identifiers, and only have meaning within
+their local context (for example, a document). The world provides a method for
+automatically generating unique blank identifiers:
+
+>>> print(repr(world.get_blank()))
+serd.blank("b1")
+>>> print(repr(world.get_blank()))
+serd.blank("b2")
+
+Model
+=====
+
+A :class:`~serd.Model` is an indexed set of statements. A model can be used to
+store any set of data, from a few statements (for example, a protocol message),
+to an entire document, to a database with millions of statements.
+
+A model can be constructed and statements inserted manually using the
+:meth:`~serd.Model.insert` method. Tuple syntax is supported as a shorthand
+for creating statements:
+
+>>> model = serd.Model(world)
+>>> model.insert((eg.s, eg.p, eg.o1))
+>>> model.insert((eg.s, eg.p, eg.o2))
+>>> model.insert((eg.t, eg.p, eg.o3))
+
+.. testsetup:: model_manual
+
+ import serd
+ eg = serd.Namespace("http://example.org/")
+ world = serd.World()
+ model = serd.Model(world)
+ model.insert((eg.s, eg.p, eg.o1))
+ model.insert((eg.s, eg.p, eg.o2))
+ model.insert((eg.t, eg.p, eg.o3))
+
+Iterating over the model yields every statement:
+
+>>> for s in model: print(s)
+<http://example.org/s> <http://example.org/p> <http://example.org/o1>
+<http://example.org/s> <http://example.org/p> <http://example.org/o2>
+<http://example.org/t> <http://example.org/p> <http://example.org/o3>
+
+Familiar Pythonic collection operations work as you would expect:
+
+>>> print(len(model))
+3
+>>> print((eg.s, eg.p, eg.o4) in model)
+False
+>>> model += (eg.s, eg.p, eg.o4)
+>>> print((eg.s, eg.p, eg.o4) in model)
+True
+
+Pattern Matching
+----------------
+
+The :meth:`~serd.Model.ask` method can be used to check if a statement is in a
+model:
+
+>>> print(model.ask(eg.s, eg.p, eg.o1))
+True
+>>> print(model.ask(eg.s, eg.p, eg.s))
+False
+
+This method is more powerful than the ``in`` statement because it also does
+pattern matching. To check for a pattern, use `None` as a wildcard:
+
+>>> print(model.ask(eg.s, None, None))
+True
+>>> print(model.ask(eg.unknown, None, None))
+False
+
+The :meth:`~serd.Model.count` method works similarly, but instead returns the
+number of statements that match the pattern:
+
+>>> print(model.count(eg.s, None, None))
+3
+>>> print(model.count(eg.unknown, None, None))
+0
+
+Getting Values
+--------------
+
+Sometimes you are only interested in a single node, and it is cumbersome to
+first search for a statement and then get the node from it. The
+:meth:`~serd.Model.get` method provides a more convenient way to do this. To
+get a value, specify a triple pattern where exactly one field is ``None``. If
+a statement matches, then the node that "fills" the wildcard will be returned:
+
+>>> print(model.get(eg.t, eg.p, None))
+http://example.org/o3
+
+If multiple statements match the pattern, then the matching node from an
+arbitrary statement is returned. It is an error to specify more than one
+wildcard, excluding the graph.
+
+Erasing Statements
+------------------
+
+>>> model2 = model.copy()
+>>> for s in model2: print(s)
+<http://example.org/s> <http://example.org/p> <http://example.org/o1>
+<http://example.org/s> <http://example.org/p> <http://example.org/o2>
+<http://example.org/s> <http://example.org/p> <http://example.org/o4>
+<http://example.org/t> <http://example.org/p> <http://example.org/o3>
+
+Individual statements can be erased by value, again with tuple syntax supported
+for convenience:
+
+>>> model2.erase((eg.s, eg.p, eg.o1))
+>>> for s in model2: print(s)
+<http://example.org/s> <http://example.org/p> <http://example.org/o2>
+<http://example.org/s> <http://example.org/p> <http://example.org/o4>
+<http://example.org/t> <http://example.org/p> <http://example.org/o3>
+
+Many statements can be erased at once by erasing a range:
+
+>>> model2.erase(model2.range((eg.s, None, None)))
+>>> for s in model2: print(s)
+<http://example.org/t> <http://example.org/p> <http://example.org/o3>
+
+Saving Documents
+----------------
+
+Serd provides simple methods to save an entire model to a file or string, which
+are similar to functions in the standard Python ``json`` module.
+
+A model can be saved to a file with the :meth:`~serd.World.dump` method:
+
+.. doctest::
+ :options: +NORMALIZE_WHITESPACE
+
+ >>> world.dump(model, "out.ttl")
+ >>> print(open("out.ttl", "r").read())
+ <http://example.org/s>
+ <http://example.org/p> <http://example.org/o1> ,
+ <http://example.org/o2> ,
+ <http://example.org/o4> .
+ <BLANKLINE>
+ <http://example.org/t>
+ <http://example.org/p> <http://example.org/o3> .
+ <BLANKLINE>
+
+Similarly, a model can be written as a string with the :meth:`serd.World.dumps`
+method:
+
+.. doctest::
+ :options: +ELLIPSIS
+
+ >>> print(world.dumps(model))
+ <http://example.org/s>
+ ...
+
+Loading Documents
+-----------------
+
+There are also simple methods to load an entire model, again loosely following
+the standard Python ``json`` module.
+
+A model can be loaded from a file with the :meth:`~serd.World.load` method:
+
+>>> model3 = world.load("out.ttl")
+>>> print(model3 == model)
+True
+
+By default, the syntax type is determined by the file extension, and only
+:attr:`serd.ModelFlags.INDEX_SPO` will be set, so only ``(s p ?)`` and ``(s ?
+?)`` queries will be fast. See the method documentation for how to control
+things more precisely.
+
+Similarly, a model can be loaded from a string with the
+:meth:`~serd.World.loads` method:
+
+>>> ttl = "<{}> <{}> <{}> .".format(eg.s, eg.p, eg.o)
+>>> model4 = world.loads(ttl)
+>>> for s in model4: print(s)
+<http://example.org/s> <http://example.org/p> <http://example.org/o>
+
+File Cursor
+-----------
+
+When data is loaded from a file into a model with the flag
+:data:`~serd.ModelFlags.STORE_CURSORS`, each statement will have a *cursor*
+which describes the file name, line, and column where the statement originated.
+The cursor points to the start of the object node in the statement:
+
+>>> model5 = world.load("out.ttl", model_flags=serd.ModelFlags.STORE_CURSORS)
+>>> for s in model5: print(s.cursor())
+out.ttl:2:24
+out.ttl:3:2
+out.ttl:4:2
+out.ttl:7:24
+
+Streaming Data
+==============
+
+More advanced input and output can be performed by using the
+:class:`~serd.Reader` and :class:`~serd.Writer` classes directly. The Reader
+produces an :class:`~serd.Event` stream which describes the content of the
+file, and the Writer consumes such a stream and writes syntax.
+
+Reading Files
+-------------
+
+The reader reads from a source, which should be a :class:`~serd.FileSource`
+to read from a file. Parsed input is sent to a sink, which is
+called for each event:
+
+.. testcode::
+
+ def sink(event):
+ print(event)
+
+ env = serd.Env()
+ reader = serd.Reader(world, serd.Syntax.TURTLE, 0, env, sink, 4096)
+ with reader.open(serd.FileSource("out.ttl")) as context:
+ context.read_document()
+
+.. testoutput::
+ :options: +ELLIPSIS
+
+ serd.Event.statement(serd.Statement(serd.uri("http://example.org/s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o1"), serd.Cursor(serd.uri("out.ttl"), 2, 24)))
+ ...
+
+For more advanced use cases that keep track of state, the sink can be a custom
+:class:`~serd.Sink` with a call operator:
+
+.. testcode::
+
+ class MySink(serd.Sink):
+ def __init__(self):
+ super().__init__()
+ self.events = []
+
+ def __call__(self, event: serd.Event) -> serd.Status:
+ self.events += [event]
+ return serd.Status.SUCCESS
+
+ env = serd.Env()
+ sink = MySink()
+ reader = serd.Reader(world, serd.Syntax.TURTLE, 0, env, sink, 4096)
+ with reader.open(serd.FileSource("out.ttl")) as context:
+ context.read_document()
+
+ print(sink.events[0])
+
+.. testoutput::
+
+ serd.Event.statement(serd.Statement(serd.uri("http://example.org/s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o1"), serd.Cursor(serd.uri("out.ttl"), 2, 24)))
+
+Reading Strings
+---------------
+
+To read from a string, use a :class:`~serd.StringSource` with the reader:
+
+.. testcode::
+
+ ttl = """
+ @base <http://drobilla.net/> .
+ @prefix eg: <http://example.org/> .
+ <sw/serd> eg:name "Serd" .
+ """
+
+ def sink(event):
+ print(event)
+
+ env = serd.Env()
+ reader = serd.Reader(world, serd.Syntax.TURTLE, 0, env, sink, 4096)
+ with reader.open(serd.StringSource(ttl)) as context:
+ context.read_document()
+
+.. testoutput::
+
+ serd.Event.base("http://drobilla.net/")
+ serd.Event.prefix("eg", "http://example.org/")
+ serd.Event.statement(serd.Statement(serd.uri("http://drobilla.net/sw/serd"), serd.uri("http://example.org/name"), serd.string("Serd"), serd.Cursor(serd.string("string"), 4, 19)))
+
+Reading into a Model
+--------------------
+
+To read new data into an existing model,
+send it to the sink returned by :meth:`~serd.Model.inserter`:
+
+.. testcode::
+
+ ttl = """
+ @prefix eg: <http://example.org/> .
+ eg:newSubject eg:p eg:o .
+ """
+
+ env = serd.Env()
+ sink = model.inserter(env)
+ reader = serd.Reader(world, serd.Syntax.TURTLE, 0, env, sink, 4096)
+ with reader.open(serd.StringSource(ttl)) as context:
+ context.read_document()
+
+ for s in model: print(s)
+
+.. testoutput::
+
+ <http://example.org/newSubject> <http://example.org/p> <http://example.org/o>
+ <http://example.org/s> <http://example.org/p> <http://example.org/o1>
+ <http://example.org/s> <http://example.org/p> <http://example.org/o2>
+ <http://example.org/s> <http://example.org/p> <http://example.org/o4>
+ <http://example.org/t> <http://example.org/p> <http://example.org/o3>
+
+Writing Files
+-------------
+
+.. testcode::
+
+ env = serd.Env()
+ byte_sink = serd.FileSink("written.ttl")
+ writer = serd.Writer(world, serd.Syntax.TURTLE, 0, env, byte_sink)
+ st = model.all().serialise(writer.sink(), 0)
+ writer.finish()
+ byte_sink.close()
+ print(open("written.ttl", "r").read())
+
+.. testoutput::
+ :options: +NORMALIZE_WHITESPACE
+
+ <http://example.org/newSubject>
+ <http://example.org/p> <http://example.org/o> .
+
+ <http://example.org/s>
+ <http://example.org/p> <http://example.org/o1> ,
+ <http://example.org/o2> ,
+ <http://example.org/o4> .
+
+ <http://example.org/t>
+ <http://example.org/p> <http://example.org/o3> .
diff --git a/bindings/python/reference.rst b/bindings/python/reference.rst
new file mode 100644
index 00000000..0b64037e
--- /dev/null
+++ b/bindings/python/reference.rst
@@ -0,0 +1,8 @@
+=============
+API Reference
+=============
+
+.. automodule:: serd
+ :members:
+ :undoc-members:
+ :inherited-members:
diff --git a/bindings/python/serd.pyx b/bindings/python/serd.pyx
new file mode 100644
index 00000000..e2ed0c6c
--- /dev/null
+++ b/bindings/python/serd.pyx
@@ -0,0 +1,2315 @@
+# cython: binding=True
+# cython: language_level=3
+# cython: warn.maybe_uninitialized=True
+# cython: warn.multiple_declarators=True
+# cython: warn.unused=True
+
+"""A lightweight library for working with RDF data."""
+
+import enum
+import logging
+import errno
+
+import cython
+
+from libc.stdint cimport uint32_t, int64_t
+
+logger = logging.getLogger(__name__)
+
+cdef extern from "stdarg.h":
+ ctypedef struct va_list:
+ pass
+
+cdef extern from "serd/serd.h":
+ ctypedef struct SerdWorld
+ ctypedef struct SerdNodes
+ ctypedef struct SerdStatement
+ ctypedef struct SerdCursor
+ ctypedef struct SerdEnv
+ ctypedef struct SerdModel
+ ctypedef struct SerdIter
+ ctypedef struct SerdRange
+ ctypedef struct SerdReader
+ ctypedef struct SerdWriter
+ ctypedef struct SerdSink
+
+ ctypedef enum SerdStatus: pass
+ ctypedef enum SerdSyntax: pass
+ ctypedef enum SerdStatementFlag: pass
+ ctypedef enum SerdSerialisationFlag: pass
+ ctypedef enum SerdNodeType: pass
+ ctypedef enum SerdNodeFlag: pass
+ ctypedef enum SerdField: pass
+ ctypedef enum SerdModelFlag: pass
+
+ ctypedef uint32_t SerdStatementFlags
+ ctypedef uint32_t SerdSerialisationFlags
+ ctypedef uint32_t SerdNodeFlags
+ ctypedef uint32_t SerdModelFlags
+
+ ctypedef struct SerdNode
+
+ ctypedef struct SerdStringView:
+ const char* buf;
+ size_t len;
+
+ ctypedef struct SerdBuffer:
+ void* buf;
+ size_t len;
+
+ ctypedef struct SerdURIView:
+ SerdStringView scheme
+ SerdStringView authority
+ SerdStringView path_prefix
+ SerdStringView path
+ SerdStringView query
+ SerdStringView fragment
+
+ ctypedef enum SerdReaderFlag : pass
+ ctypedef uint32_t SerdReaderFlags
+
+ ctypedef enum SerdWriterFlag : pass
+ ctypedef uint32_t SerdWriterFlags
+
+ void serd_free(void* ptr);
+
+ # String Utilities
+ const char* serd_strerror(SerdStatus status);
+
+ # Base64
+
+ size_t serd_base64_encoded_length(size_t size, bint wrap_lines);
+ size_t serd_base64_decoded_size(size_t len);
+
+ bint serd_base64_encode(char* str,
+ const void* buf,
+ size_t size,
+ bint wrap_lines);
+
+ SerdStatus serd_base64_decode(void* buf,
+ size_t* size,
+ const char* str,
+ size_t len);
+
+ # Byte Source
+
+ ctypedef struct SerdByteSource
+
+ ctypedef int (*SerdStreamErrorFunc)(void* stream);
+
+ ctypedef size_t (*SerdReadFunc)(void* buf,
+ size_t size,
+ size_t nmemb,
+ void* stream);
+
+ SerdByteSource* serd_byte_source_new_string(const char* string,
+ const SerdNode* name);
+
+ SerdByteSource* serd_byte_source_new_filename(const char* path,
+ size_t block_size);
+
+ SerdByteSource* serd_byte_source_new_function(
+ SerdReadFunc read_func,
+ SerdStreamErrorFunc error_func,
+ void* stream,
+ const SerdNode* name,
+ size_t block_size);
+
+ void serd_byte_source_free(SerdByteSource* source);
+
+ # Byte sink
+
+ ctypedef struct SerdByteSink
+
+ ctypedef size_t (*SerdWriteFunc)(const void* buf,
+ size_t size,
+ size_t nmemb,
+ void* stream);
+
+ SerdByteSink* serd_byte_sink_new_buffer(SerdBuffer* buffer);
+
+ SerdByteSink* serd_byte_sink_new_filename(const char* path,
+ size_t block_size);
+
+ SerdByteSink* serd_byte_sink_new_function(SerdWriteFunc write_func,
+ void* stream,
+ size_t block_size);
+
+ void serd_byte_sink_flush(SerdByteSink* sink);
+ void serd_byte_sink_close(SerdByteSink* sink);
+ void serd_byte_sink_free(SerdByteSink* sink);
+
+ # Syntax Utilities
+
+ SerdSyntax serd_syntax_by_name(const char* name);
+ SerdSyntax serd_guess_syntax(const char* filename);
+ bint serd_syntax_has_graphs(SerdSyntax syntax);
+
+ # URI
+
+ char* serd_parse_file_uri(const char* uri, char** hostname);
+ bint serd_uri_string_has_scheme(const char* utf8);
+ SerdStatus serd_parse_uri(const char* utf8, SerdURIView* out);
+
+ SerdURIView serd_resolve_uri(SerdURIView r, SerdURIView base);
+
+ size_t serd_write_uri(SerdURIView uri, SerdWriteFunc sink, void* stream);
+
+ # Node
+
+ SerdNode* serd_node_from_syntax(const char* str, SerdSyntax syntax);
+ char* serd_node_to_syntax(const SerdNode* node, SerdSyntax syntax);
+
+ SerdNode* serd_new_simple_node(SerdNodeType type, SerdStringView string);
+ SerdNode* serd_new_string(SerdStringView string);
+ SerdNode* serd_new_plain_literal(SerdStringView str, SerdStringView lang);
+ SerdNode* serd_new_typed_literal(SerdStringView str, SerdStringView datatype_uri);
+
+ SerdNode* serd_new_blank(SerdStringView string);
+ SerdNode* serd_new_curie(SerdStringView string);
+ SerdNode* serd_new_uri(SerdStringView string);
+ SerdNode* serd_new_parsed_uri(SerdURIView uri);
+ SerdNode* serd_new_file_uri(SerdStringView path, SerdStringView hostname);
+ SerdNode* serd_new_boolean(bint b);
+ SerdNode* serd_new_decimal(double d, const SerdNode* datatype);
+ SerdNode* serd_new_double(double d);
+ SerdNode* serd_new_float(float f);
+ SerdNode* serd_new_integer(int64_t i, const SerdNode* datatype);
+ SerdNode* serd_new_blob(const void* buf, size_t size, const SerdNode* datatype);
+
+ bint serd_get_boolean(const SerdNode* node);
+ double serd_get_double(const SerdNode* node);
+ float serd_get_float(const SerdNode* node);
+ int64_t serd_get_integer(const SerdNode* node);
+ SerdNode* serd_node_copy(const SerdNode* node);
+ void serd_node_free(SerdNode* node);
+ SerdNodeType serd_node_type(const SerdNode* node);
+ const char* serd_node_string(const SerdNode* node);
+ size_t serd_node_length(const SerdNode* node);
+ SerdStringView serd_node_string_view(const SerdNode* node);
+ SerdURIView serd_node_uri_view(const SerdNode* node);
+ SerdNodeFlags serd_node_flags(const SerdNode* node);
+ const SerdNode* serd_node_datatype(const SerdNode* node);
+ const SerdNode* serd_node_language(const SerdNode* node);
+ bint serd_node_equals(const SerdNode* a, const SerdNode* b);
+ int serd_node_compare(const SerdNode* a, const SerdNode* b);
+
+ # Event
+
+ ctypedef enum SerdEventType: pass
+
+ ctypedef struct SerdBaseEvent:
+ SerdEventType type;
+ const SerdNode* uri;
+
+ ctypedef struct SerdPrefixEvent:
+ SerdEventType type;
+ const SerdNode* name;
+ const SerdNode* uri;
+
+ ctypedef struct SerdStatementEvent:
+ SerdEventType type;
+ SerdStatementFlags flags;
+ const SerdStatement* statement;
+
+ ctypedef struct SerdEndEvent:
+ SerdEventType type;
+ const SerdNode* node;
+
+ ctypedef union SerdEvent:
+ SerdEventType type;
+ SerdBaseEvent base;
+ SerdPrefixEvent prefix;
+ SerdStatementEvent statement;
+ SerdEndEvent end;
+
+ ctypedef SerdStatus (*SerdEventFunc)(void* handle, const SerdEvent* event);
+
+ # World
+
+ SerdWorld* serd_world_new();
+ void serd_world_free(SerdWorld* world);
+ SerdNodes* serd_world_nodes(SerdWorld* world);
+ const SerdNode* serd_world_get_blank(SerdWorld* world);
+
+ # TODO: logging
+
+ ctypedef enum SerdLogLevel: pass
+
+ cdef struct SerdLogField:
+ const char* key;
+ const char* value;
+
+ cdef struct SerdLogEntry:
+ const char* domain;
+ const SerdLogField* fields;
+ const char* fmt;
+ va_list* args;
+ SerdLogLevel level;
+ size_t n_fields;
+
+ ctypedef SerdStatus (*SerdLogFunc)(void* handle, const SerdLogEntry* entry);
+
+ # SerdStatus serd_quiet_error_func(void* handle, const SerdLogEntry* entry);
+
+ # const char* serd_log_entry_get_field(const SerdLogEntry* entry,
+ # const char* key);
+
+ void serd_world_set_log_func(SerdWorld* world,
+ SerdLogFunc log_func,
+ void* handle);
+
+ # SerdStatus serd_world_vlogf(const SerdWorld* world,
+ # const char* domain,
+ # SerdLogLevel level,
+ # size_t n_fields,
+ # const SerdLogField* fields,
+ # const char* fmt,
+ # va_list args);
+
+ SerdStatus serd_world_logf(const SerdWorld* world,
+ const char* domain,
+ SerdLogLevel level,
+ size_t n_fields,
+ const SerdLogField* fields,
+ const char* fmt,
+ ...);
+
+ # Environment
+
+ SerdEnv* serd_env_new(const SerdStringView base_uri);
+ SerdEnv* serd_env_copy(const SerdEnv* env);
+ bint serd_env_equals(const SerdEnv* a, const SerdEnv* b);
+ void serd_env_free(SerdEnv* env);
+ const SerdNode* serd_env_base_uri(SerdEnv* env)
+ SerdStatus serd_env_set_base_uri(SerdEnv* env, SerdStringView uri);
+
+ SerdStatus serd_env_set_prefix(SerdEnv* env,
+ SerdStringView name,
+ SerdStringView uri);
+
+ SerdNode* serd_env_qualify(const SerdEnv* env, const SerdNode* uri);
+ SerdNode* serd_env_expand(const SerdEnv* env, const SerdNode* node);
+
+ void serd_env_write_prefixes(const SerdEnv* env, const SerdSink* sink);
+
+ # Inserter
+
+ SerdSink* serd_inserter_new(SerdModel* model,
+ SerdEnv* env,
+ const SerdNode* default_graph);
+
+ # Statement
+
+ SerdStatement* serd_statement_new(const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g,
+ const SerdCursor* cursor);
+
+ SerdStatement* serd_statement_copy(const SerdStatement* statement);
+ void serd_statement_free(SerdStatement* statement);
+
+ const SerdNode* serd_statement_node(const SerdStatement* statement,
+ SerdField field);
+
+ const SerdNode* serd_statement_subject(const SerdStatement* statement);
+ const SerdNode* serd_statement_predicate(const SerdStatement* statement);
+ const SerdNode* serd_statement_object(const SerdStatement* statement);
+ const SerdNode* serd_statement_graph(const SerdStatement* statement);
+
+ const SerdCursor* serd_statement_cursor(const SerdStatement* statement);
+
+ bint serd_statement_equals(const SerdStatement* a, const SerdStatement* b);
+
+ bint serd_statement_matches(const SerdStatement* statement,
+ const SerdNode* subject,
+ const SerdNode* predicate,
+ const SerdNode* object,
+ const SerdNode* graph);
+
+ # Iter
+
+ SerdIter* serd_iter_copy(const SerdIter* iter);
+ const SerdStatement* serd_iter_get(const SerdIter* iter);
+
+ bint serd_iter_next(SerdIter* iter);
+ bint serd_iter_equals(const SerdIter* lhs, const SerdIter* rhs);
+ void serd_iter_free(SerdIter* iter);
+
+ # Range
+
+ SerdRange* serd_range_copy(const SerdRange* range);
+ void serd_range_free(SerdRange* range);
+ const SerdStatement* serd_range_front(const SerdRange* range);
+
+ bint serd_range_equals(const SerdRange* lhs, const SerdRange* rhs);
+
+ bint serd_range_next(SerdRange* range);
+ bint serd_range_empty(const SerdRange* range);
+ const SerdIter* serd_range_cbegin(const SerdRange* range);
+ const SerdIter* serd_range_cend(const SerdRange* range);
+ SerdIter* serd_range_begin(SerdRange* range);
+ SerdIter* serd_range_end(SerdRange* range);
+
+ SerdStatus serd_range_serialise(const SerdRange* range,
+ const SerdSink* sink,
+ SerdSerialisationFlags flags);
+
+
+ # Sink
+
+ ctypedef void (*SerdFreeFunc)(void* ptr);
+
+ SerdSink* serd_sink_new(void* handle,
+ SerdEventFunc event_func,
+ SerdFreeFunc free_handle);
+
+ void serd_sink_free(SerdSink* sink);
+
+ SerdStatus serd_sink_set_event_func(SerdSink* sink,
+ SerdEventFunc event_func);
+
+ SerdStatus serd_sink_write_event(const SerdSink* sink,
+ const SerdEvent* event);
+
+ SerdStatus serd_sink_write_base(const SerdSink* sink,
+ const SerdNode* uri);
+
+ SerdStatus serd_sink_write_prefix(const SerdSink* sink,
+ const SerdNode* name,
+ const SerdNode* uri);
+
+ SerdStatus serd_sink_write_statement(const SerdSink* sink,
+ SerdStatementFlags flags,
+ const SerdStatement* statement);
+
+ SerdStatus serd_sink_write(const SerdSink* sink,
+ SerdStatementFlags flags,
+ const SerdNode* subject,
+ const SerdNode* predicate,
+ const SerdNode* object,
+ const SerdNode* graph);
+
+ SerdStatus serd_sink_write_end(const SerdSink* sink, const SerdNode* node);
+
+ # Stream Processing
+
+ SerdSink* serd_canon_new(const SerdSink* target);
+
+ SerdSink* serd_filter_new(const SerdSink* target,
+ const SerdNode* subject,
+ const SerdNode* predicate,
+ const SerdNode* object,
+ const SerdNode* graph);
+
+ # Reader
+
+ SerdReader* serd_reader_new(SerdWorld* world,
+ SerdSyntax syntax,
+ SerdReaderFlags flags,
+ SerdEnv* env,
+ const SerdSink* sink,
+ size_t stack_size);
+
+ void serd_reader_add_blank_prefix(SerdReader* reader, const char* prefix);
+
+ SerdStatus serd_reader_start(SerdReader* reader, SerdByteSource* byte_source);
+ SerdStatus serd_reader_read_chunk(SerdReader* reader);
+ SerdStatus serd_reader_read_document(SerdReader* reader);
+ SerdStatus serd_reader_finish(SerdReader* reader);
+
+ void serd_reader_free(SerdReader* reader);
+
+ # Writer
+
+ SerdWriter* serd_writer_new(SerdWorld* world,
+ SerdSyntax syntax,
+ SerdWriterFlags flags,
+ SerdEnv* env,
+ SerdByteSink* byte_sink);
+
+ void serd_writer_free(SerdWriter* writer);
+ const SerdSink* serd_writer_sink(SerdWriter* writer);
+
+ size_t serd_buffer_sink(const void* buf,
+ size_t size,
+ size_t nmemb,
+ void* stream);
+
+ char* serd_buffer_sink_finish(SerdBuffer* stream);
+
+ void serd_writer_chop_blank_prefix(SerdWriter* writer, const char* prefix);
+
+ SerdStatus serd_writer_set_base_uri(SerdWriter* writer,
+ const SerdNode* uri);
+
+ SerdStatus serd_writer_set_root_uri(SerdWriter* writer,
+ const SerdNode* uri);
+
+ SerdStatus serd_writer_finish(SerdWriter* writer);
+
+ # Model
+
+ SerdModel* serd_model_new(SerdWorld* world, SerdModelFlags flags);
+ SerdModel* serd_model_copy(const SerdModel* model);
+ bint serd_model_equals(const SerdModel* a, const SerdModel* b);
+ void serd_model_free(SerdModel* model);
+ SerdWorld* serd_model_world(SerdModel* model);
+ SerdModelFlags serd_model_flags(const SerdModel* model);
+ size_t serd_model_size(const SerdModel* model);
+ bint serd_model_empty(const SerdModel* model);
+ SerdIter* serd_model_begin(const SerdModel* model);
+ const SerdIter* serd_model_end(const SerdModel* model);
+ SerdRange* serd_model_all(const SerdModel* model);
+
+ SerdIter* serd_model_find(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ SerdRange* serd_model_range(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ const SerdNode* serd_model_get(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ const SerdStatement* serd_model_get_statement(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ bint serd_model_ask(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ size_t serd_model_count(const SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ SerdStatus serd_model_add(SerdModel* model,
+ const SerdNode* s,
+ const SerdNode* p,
+ const SerdNode* o,
+ const SerdNode* g);
+
+ SerdStatus serd_model_insert(SerdModel* model,
+ const SerdStatement* statement);
+
+ SerdStatus serd_model_add_range(SerdModel* model, SerdRange* range);
+ SerdStatus serd_model_erase(SerdModel* model, SerdIter* iter);
+ SerdStatus serd_model_erase_range(SerdModel* model, SerdRange* range);
+ SerdStatus serd_validate(const SerdModel* model);
+
+
+ # Cursor
+
+ SerdCursor* serd_cursor_new(const SerdNode* name,
+ unsigned line,
+ unsigned col);
+
+ SerdCursor* serd_cursor_copy(const SerdCursor* cursor);
+ void serd_cursor_free(SerdCursor* cursor);
+
+ bint serd_cursor_equals(const SerdCursor* lhs, const SerdCursor* rhs);
+
+ const SerdNode* serd_cursor_name(const SerdCursor* cursor);
+ unsigned serd_cursor_line(const SerdCursor* cursor);
+ unsigned serd_cursor_column(const SerdCursor* cursor);
+
+
+class Status(enum.IntEnum):
+ """Return status code."""
+ SUCCESS = 0 # No error
+ FAILURE = 1 # Non-fatal failure
+ ERR_UNKNOWN = 2 # Unknown error
+ ERR_BAD_SYNTAX = 3 # Invalid syntax
+ ERR_BAD_ARG = 4 # Invalid argument
+ ERR_BAD_ITER = 5 # Use of invalidated iterator
+ ERR_NOT_FOUND = 6 # Not found
+ ERR_ID_CLASH = 7 # Encountered clashing blank node IDs
+ ERR_BAD_CURIE = 8 # Invalid CURIE (e.g. prefix does not exist)
+ ERR_INTERNAL = 9 # Unexpected internal error (should not happen)
+ ERR_OVERFLOW = 10 # Stack overflow
+ ERR_INVALID = 11 # Invalid data
+ ERR_NO_DATA = 12 # Unexpected end of input
+ ERR_BAD_WRITE = 13 # Error writing to file/stream
+ ERR_BAD_CALL = 14 # Invalid call
+
+
+class Syntax(enum.IntEnum):
+ """RDF syntax type."""
+ EMPTY = 0 # Empty syntax (suppress input or output)
+ TURTLE = 1 # Terse triples http://www.w3.org/TR/turtle
+ NTRIPLES = 2 # Flat triples http://www.w3.org/TR/n-triples/
+ NQUADS = 3 # Flat quads http://www.w3.org/TR/n-quads/
+ TRIG = 4 # Terse quads http://www.w3.org/TR/trig/
+
+
+class StatementFlags(enum.IntFlag):
+ """Flags indicating inline abbreviation information for a statement."""
+ EMPTY_S = 1 << 0 # Empty blank node subject
+ ANON_S = 1 << 1 # Start of anonymous subject
+ ANON_O = 1 << 2 # Start of anonymous object
+ LIST_S = 1 << 3 # Start of list subject
+ LIST_O = 1 << 4 # Start of list object
+ TERSE_S = 1 << 5 # Terse serialisation of new subject
+ TERSE_O = 1 << 6 # Terse serialisation of new object
+
+
+class SerialisationFlags(enum.IntFlag):
+ """Flags that control the style of a model serialisation."""
+ NO_INLINE_OBJECTS = 1 << 0 # Disable object inlining
+
+
+class NodeType(enum.IntEnum):
+ """Type of a node
+
+ An RDF node, in the abstract sense, can be either a resource, literal, or a
+ blank. This type is more precise, because syntactically there are two ways
+ to refer to a resource (by URI or CURIE). Serd also has support for
+ variable nodes to support some features, which are not RDF nodes.
+
+ There are also two ways to refer to a blank node in syntax (by ID or
+ anonymously), but this is handled by statement flags rather than distinct
+ node types.
+ """
+ LITERAL = 1 # Literal value
+ URI = 2 # URI (absolute or relative)
+ CURIE = 3 # CURIE (shortened URI)
+ BLANK = 4 # Blank node
+ VARIABLE = 5 # Variable node
+
+
+class NodeFlags(enum.IntFlag):
+ """Flags indicating certain string properties relevant to serialisation."""
+ IS_LONG_LITERAL = 1 << 1 # Literal uses long syntax (triple-quoted)
+ HAS_DATATYPE = 1 << 2 # Literal node has datatype
+ HAS_LANGUAGE = 1 << 3 # Literal node has language
+
+
+class Field(enum.IntEnum):
+ """Index of a statement in a field."""
+ SUBJECT = 0 # Subject
+ PREDICATE = 1 # Predicate ("key")
+ OBJECT = 2 # Object ("value")
+ GRAPH = 3 # Graph ("context")
+
+
+class ModelFlags(enum.IntFlag):
+ """Flags that control model storage and indexing."""
+ INDEX_SPO = 1 << 0 # Subject, Predicate, Object
+ INDEX_SOP = 1 << 1 # Subject, Object, Predicate
+ INDEX_OPS = 1 << 2 # Object, Predicate, Subject
+ INDEX_OSP = 1 << 3 # Object, Subject, Predicate
+ INDEX_PSO = 1 << 4 # Predicate, Subject, Object
+ INDEX_POS = 1 << 5 # Predicate, Object, Subject
+ INDEX_GRAPHS = 1 << 6 # Support multiple graphs in model
+ STORE_CURSORS = 1 << 7 # Store original cursor of statements
+
+# TODO: URI
+
+
+class ReaderFlags(enum.IntFlag):
+ """Reader support options."""
+ READ_LAX = 1 << 0 # Tolerate invalid input where possible
+ READ_VARIABLES = 1 << 1 # Support variable nodes
+
+
+class WriterFlags(enum.IntFlag):
+ """Writer style options.
+
+ These flags allow more precise control of writer output style. Note that
+ some options are only supported for some syntaxes, for example, NTriples
+ does not support abbreviation and is always ASCII.
+ """
+ WRITE_ASCII = 1 << 0 # Escape all non-ASCII characters
+ WRITE_TERSE = 1 << 1 # Write terser output without newlines
+ WRITE_LAX = 1 << 2 # Tolerate lossy output
+
+
+class EventType(enum.IntEnum):
+ """The type of a :class:`serd.Event`."""
+ BASE = 1
+ PREFIX = 2
+ STATEMENT = 3
+ END = 4
+
+
+# Private Python Bindings Utilities
+
+cdef SerdNode* _unwrap_node(node: Node):
+ if node is None:
+ return NULL
+ elif type(node) == Node:
+ return (<Node>node)._ptr
+
+ raise TypeError("Expected Node, got %s" % type(node))
+
+
+def _uri_from_param(param) -> Node:
+ if isinstance(param, type("")):
+ return uri(param)
+ elif isinstance(param, Node) and (<Node>param).type() == NodeType.URI:
+ return param
+
+ raise TypeError("Expected string or URI node, got %s" % type(param))
+
+
+def _blank_from_param(param) -> Node:
+ if isinstance(param, type("")):
+ return blank(param)
+ elif isinstance(param, Node) and (<Node>param).type() == NodeType.BLANK:
+ return param
+
+ raise TypeError("Expected string or blank node, got %s" % type(param))
+
+
+def _tocstr(s: str):
+ return s.encode('utf-8')
+
+
+def _string_view(s: str):
+ encoded = s.encode('utf-8')
+ return SerdStringView(encoded, len(encoded)) # FIXME: len?
+
+
+def _fromcstr(const char* s):
+ return s.decode('utf-8')
+
+
+# Public Python API Utilities
+
+class Namespace:
+ """Namespace prefix.
+
+ Use attribute syntax to easily create URIs within this namespace, for
+ example::
+
+ >>> world = lilv.World()
+ >>> ns = Namespace(world, "http://example.org/")
+ >>> print(ns.foo)
+ http://example.org/foo
+ """
+
+ def __init__(self, prefix):
+ self.prefix = str(_uri_from_param(prefix))
+
+ def __add__(self, suffix: str):
+ return uri(self.prefix + suffix)
+
+ def __eq__(self, other):
+ if type(other) == Namespace:
+ return self.prefix == other.prefix
+ elif type(other) == str:
+ return self.prefix == other
+ elif type(other) == Node:
+ return other.type() == NodeType.URI and other == self.prefix
+
+ def __str__(self):
+ return self.prefix
+
+ def __getattr__(self, suffix: str):
+ return uri(self.prefix + suffix)
+
+ def __getitem__(self, suffix: str):
+ return uri(self.prefix + suffix)
+
+ def name(self, uri):
+ uri = _uri_from_param(uri)
+ if uri is not None and str(uri).startswith(self.prefix):
+ return str(uri)[len(self.prefix):]
+
+ return None
+
+
+# String Utilities
+
+
+def strerror(status: Status) -> str:
+ """Return a string describing a status code."""
+ return _fromcstr(serd_strerror(status))
+
+
+# Base64
+
+
+# def base64_encode(const unsigned char[:] data, wrap_lines=False) -> str:
+# """Encode `data` to base64.
+
+# Args:
+# data: Array of arbitrary bytes to encode.
+# wrap_lines: Wrap lines at 76 characters to conform to RFC 2045.
+
+# Returns:
+# A string encoded in base64 format.
+# """
+# size = len(data)
+# length = serd_base64_encoded_length(size, wrap_lines)
+# result = bytes(length)
+# serd_base64_encode(result, &data[0], size, wrap_lines)
+
+# return result.decode("utf-8")
+
+
+# def base64_decode(string: str) -> bytes:
+# """Decode `string` from base64."""
+# length = len(string)
+# size = serd_base64_decoded_size(length)
+# result = cython.view.array(shape=(size,), itemsize=1, format="c")
+# actual_size = <size_t>0
+
+# cdef unsigned char[::1] result_view = result
+
+# serd_base64_decode(&result_view[0], &actual_size, _tocstr(string), length)
+# assert actual_size <= size
+
+# return bytes(result[0 : actual_size])
+
+
+# Syntax Utilities
+
+
+def syntax_by_name(name: str) -> Syntax:
+ """Get a syntax by name.
+
+ Case-insensitive, supports "Turtle", "NTriples", "NQuads", and "TriG".
+
+ Returns:
+ A syntax, or Syntax.EMPTY if the name is not recognized.
+ """
+ return Syntax(serd_syntax_by_name(_tocstr(name)))
+
+
+def guess_syntax(filename: str) -> Syntax:
+ """Guess a syntax from a filename.
+
+ This uses the file extension to guess the syntax of a file.
+
+ Returns:
+ A syntax, or Syntax.EMPTY if the name is not recognized.
+ """
+ return Syntax(serd_guess_syntax(_tocstr(filename)))
+
+
+def syntax_has_graphs(syntax: Syntax) -> bool:
+ """Return whether a syntax can represent multiple graphs.
+
+ Returns:
+ True for Syntax.NQUADS and Syntax.TRIG, False otherwise.
+ """
+ return serd_syntax_has_graphs(syntax)
+
+
+# World
+
+
+cdef class World:
+ """Global library state."""
+
+ cdef SerdWorld* _ptr
+
+ def __init__(self):
+ self._ptr = serd_world_new()
+
+ def __dealloc__(self):
+ serd_world_free(self._ptr)
+ self._ptr = NULL
+
+ def get_blank(self) -> Node:
+ return Node._wrap(serd_world_get_blank(self._ptr))
+
+ def load(
+ self,
+ path: str,
+ syntax: Syntax = Syntax.TURTLE,
+ reader_flags: ReaderFlags = ReaderFlags(0),
+ model_flags: ModelFlags = ModelFlags.INDEX_SPO,
+ stack_size: int = 4096,
+ ) -> Model:
+ """Load a model from a file and return it."""
+ base_uri = file_uri(path)
+ env = Env(base_uri)
+ model = Model(self, model_flags)
+ inserter = model.inserter(env)
+ byte_source = FileSource(path)
+ reader = Reader(self, syntax, reader_flags, env, inserter, stack_size)
+
+ st = reader.start(byte_source)
+ _ensure_success(st, "Failed to open file {}".format(path))
+
+ st = reader.read_document()
+ _ensure_success(st, "Failed to read file {}".format(path))
+
+ st = reader.finish()
+ _ensure_success(st, "Failed to finish reading file {}".format(path))
+
+ return model
+
+ def loads(
+ self,
+ s: str,
+ base_uri: Node = None,
+ syntax: Syntax = Syntax.TURTLE,
+ reader_flags: ReaderFlags = ReaderFlags(0),
+ model_flags: ModelFlags = ModelFlags.INDEX_SPO,
+ stack_size: int = 4096,
+ ) -> Model:
+ """Load a model from a string and return it."""
+ env = Env(base_uri)
+ model = Model(self, model_flags)
+ inserter = model.inserter(env)
+ byte_source = StringSource(s)
+ reader = Reader(self, syntax, reader_flags, env, inserter, stack_size)
+
+ st = reader.start(byte_source)
+ _ensure_success(st, "Failed to start reading string")
+
+ st = reader.read_document()
+ _ensure_success(st, "Failed to read string")
+
+ st = reader.finish()
+ _ensure_success(st, "Failed to finish reading string")
+
+ return model
+
+ def dump(
+ self,
+ model: Model,
+ path: str,
+ syntax: Syntax = Syntax.TURTLE,
+ writer_flags: WriterFlags = WriterFlags(0),
+ serialisation_flags: SerialisationFlags = SerialisationFlags(0),
+ env: Env = None,
+ ) -> None:
+ """Write a model to a file."""
+ byte_sink = FileSink(filename=path)
+ writer = Writer(self, syntax, writer_flags, env, byte_sink)
+ st = model.all().serialise(writer.sink(), serialisation_flags)
+ writer.finish()
+ byte_sink.flush()
+ _ensure_success(st)
+
+ def dumps(
+ self,
+ model: Model,
+ syntax: Syntax = Syntax.TURTLE,
+ writer_flags: WriterFlags = WriterFlags(0),
+ serialisation_flags: SerialisationFlags = SerialisationFlags(0),
+ env: Env = None,
+ ) -> str:
+ """Write a model to a string and return it."""
+ byte_sink = StringSink()
+ writer = Writer(self, syntax, writer_flags, env, byte_sink)
+ st = model.all().serialise(writer.sink(), serialisation_flags)
+ writer.finish()
+
+ _ensure_success(st)
+
+ return byte_sink.output()
+
+
+cdef class Node:
+ """An RDF node."""
+
+ cdef SerdNode* _ptr
+
+ @staticmethod
+ cdef Node _manage(SerdNode* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Node wrapper = Node.__new__(Node)
+ wrapper._ptr = ptr
+ return wrapper
+
+ @staticmethod
+ cdef Node _wrap(const SerdNode* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Node wrapper = Node.__new__(Node)
+ wrapper._ptr = serd_node_copy(ptr)
+ return wrapper
+
+ @staticmethod
+ def from_syntax(string: str, syntax: Syntax = Syntax.TURTLE):
+ """Return a new node created from a string.
+
+ The string must be a single node in the given syntax, as returned by
+ :meth:`serd.Node.to_syntax`.
+ """
+ return Node._manage(serd_node_from_syntax(_tocstr(string),
+ Syntax.TURTLE))
+
+ def __init__(self, value):
+ if isinstance(value, str):
+ value_view = _string_view(value)
+ self._ptr = serd_new_string(value_view)
+ elif isinstance(value, type(True)):
+ self._ptr = serd_new_boolean(value)
+ elif isinstance(value, type(1)):
+ if value < -9223372036854775808 or value > 9223372036854775807:
+ raise ValueError("Integer out of range for xsd:long: %s" % value)
+
+ self._ptr = serd_new_integer(value, NULL)
+ elif isinstance(value, type(1.0)):
+ self._ptr = serd_new_double(value)
+ else:
+ raise TypeError("Bad argument type for Node(): %s" % type(value))
+
+ def __dealloc__(self):
+ if self._ptr is not NULL:
+ serd_node_free(self._ptr)
+ self._ptr = NULL
+
+ def __hash__(self):
+ return (hash(self.type()) ^
+ hash(str(self)) ^
+ hash(self.datatype()) ^
+ hash(self.language()))
+
+ def __str__(self):
+ return _fromcstr(serd_node_string(self._ptr))
+
+ def __repr__(self):
+ assert self._ptr is not NULL
+ if self.type() == NodeType.LITERAL:
+ datatype = self.datatype()
+ language = self.language()
+ if datatype is None and language is None:
+ return 'serd.string("{}")'.format(self)
+ elif language is not None:
+ return 'serd.plain_literal("{}", "{}")'.format(
+ self, self.language())
+ elif datatype == "http://www.w3.org/2001/XMLSchema#boolean":
+ return 'serd.boolean({})'.format(
+ "True" if self == "true" else "False")
+
+ return 'serd.typed_literal("{}", "{}")'.format(
+ self, self.datatype())
+ if self.type() == NodeType.URI:
+ return 'serd.uri("{}")'.format(self)
+ if self.type() == NodeType.CURIE:
+ return 'serd.curie("{}")'.format(self)
+ if self.type() == NodeType.BLANK:
+ return 'serd.blank("{}")'.format(self)
+ if self.type() == NodeType.VARIABLE:
+ return 'serd.variable("{}")'.format(self)
+
+ raise NotImplementedError("Unknown node type {}".format(self.type()))
+
+ def __len__(self):
+ return serd_node_length(self._ptr)
+
+ def __eq__(self, rhs):
+ if rhs is None:
+ return False
+ elif type(rhs) == Node:
+ return serd_node_equals(self._ptr, (<Node>rhs)._ptr)
+ else:
+ return str(self) == rhs
+
+ def __lt__(self, rhs: Node):
+ return serd_node_compare(self._ptr, rhs._ptr) < 0
+
+ def __le__(self, rhs: Node):
+ return serd_node_compare(self._ptr, rhs._ptr) <= 0
+
+ def string_view(self):
+ return serd_node_string_view(self._ptr)
+
+ def type(self) -> NodeType:
+ """Return the type of this node.
+
+ This returns the fundamental "kind" of the node, for example
+ NodeType.URI or NodeType.LITERAL. Note that this is different than the
+ optional datatype URI of a literal node, which, for example, states
+ that a literal is an integer or a double.
+ """
+ return NodeType(serd_node_type(self._ptr))
+
+ def datatype(self) -> Node:
+ """Return the datatype of this literal, or None.
+
+ The returned node is always a URI, typically something like
+ `serd.uri("http://www.w3.org/2001/XMLSchema#decimal")`.
+ """
+ return Node._wrap(serd_node_datatype(self._ptr))
+
+ def language(self) -> Node:
+ """Return the language of this literal, or None.
+
+ The returned node is always a string, typically something like
+ `serd.string("en")`.
+ """
+ return Node._wrap(serd_node_language(self._ptr))
+
+ def flags(self) -> NodeFlags:
+ """Return flags that describe the basic properties of this node."""
+ return NodeFlags(serd_node_flags(self._ptr))
+
+ def to_syntax(self, syntax: Syntax = Syntax.TURTLE) -> str:
+ """Return a string representation of this node in a syntax.
+
+ The returned string represents that node as if written as an object in
+ the given syntax, without any extra quoting or punctuation. The syntax
+ should be either TURTLE or NTRIPLES (the others are redundant). Note
+ that namespaced (CURIE) nodes and relative URIs can not be expressed in
+ NTriples.
+
+ Passing the returned string to Node.from_syntax() will produce a node
+ equivalent to this one.
+ """
+ cstr = serd_node_to_syntax(self._ptr, syntax)
+ result = _fromcstr(cstr)
+ serd_free(cstr)
+ return result
+
+
+# Node constructors
+
+
+def string(s: str) -> Node:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_string(s_view))
+
+
+def plain_literal(s: str, lang: str = None) -> Node:
+ s_view = _string_view(s)
+ if lang is not None:
+ s_view = _string_view(s)
+ lang_view = _string_view(lang)
+ return Node._manage(serd_new_plain_literal(s_view, lang_view))
+ else:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_string(s_view))
+
+
+def typed_literal(s: str, datatype) -> Node:
+ s_view = _string_view(s)
+ datatype_node = _uri_from_param(datatype)
+ if type(datatype_node) == Node:
+ datatype_uri_view = datatype_node.string_view()
+ return Node._manage(serd_new_typed_literal(s_view, datatype_uri_view))
+
+ return None
+
+
+def blank(s: str) -> Node:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_blank(s_view))
+
+
+def curie(s: str) -> Node:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_curie(s_view))
+
+
+def uri(s: str) -> Node:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_uri(s_view))
+
+
+# def resolved_uri(s: str, base: Node) -> Node:
+# return Node._manage(serd_new_resolved_uri(_tocstr(s), base._ptr))
+
+
+def file_uri(path: str, hostname: str = "") -> Node:
+ path_view = _string_view(path)
+ hostname_view = _string_view(hostname)
+ return Node._manage(serd_new_file_uri(path_view, hostname_view))
+
+
+
+# def relative_uri(s: str, base: Node, root: Node) -> Node:
+# return Node._manage(serd_new_relative_uri(_tocstr(s), base._ptr, root._ptr))
+
+
+def decimal(
+ d: float,
+ datatype: Node = None,
+) -> Node:
+ return Node._manage(
+ serd_new_decimal(
+ d,
+ datatype._ptr if datatype else NULL,
+ )
+ )
+
+
+def double(d: float) -> Node:
+ return Node._manage(serd_new_double(d))
+
+
+def float(f: float) -> Node:
+ return Node._manage(serd_new_float(<float>f) )
+
+
+def integer(i: int, datatype: Node = None) -> Node:
+ return Node._manage(
+ serd_new_integer(i, datatype._ptr if datatype else NULL)
+ )
+
+
+def boolean(b: bool) -> Node:
+ return Node._manage(serd_new_boolean(b))
+
+
+def blob(const unsigned char[:] buf,
+ datatype: Node = None) -> Node:
+ assert datatype is None or type(datatype) == Node
+ return Node._manage(
+ serd_new_blob(
+ &buf[0], len(buf), datatype._ptr if datatype else NULL
+ )
+ )
+
+
+def variable(s: str) -> Node:
+ s_view = _string_view(s)
+ return Node._manage(serd_new_simple_node(NodeType.VARIABLE, s_view))
+
+
+cdef SerdStringView _empty_string = SerdStringView("", 0)
+
+
+cdef class Env:
+
+ """Lexical environment for abbreviating and expanding URIs."""
+
+ cdef SerdEnv* _ptr
+
+ @staticmethod
+ cdef Env _manage(SerdEnv* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Env wrapper = Env.__new__(Node)
+ wrapper._ptr = ptr
+ return wrapper
+
+ def __init__(self, arg=None):
+ if arg is None:
+ self._ptr = serd_env_new(_empty_string)
+ elif type(arg) == Env:
+ self._ptr = serd_env_copy((<Env>arg)._ptr)
+ elif type(arg) == Node:
+ arg_view = arg.string_view()
+ self._ptr = serd_env_new(arg_view)
+ else:
+ raise TypeError("Bad argument type for Env(): %s" % type(arg))
+
+ def __dealloc__(self):
+ serd_env_free(self._ptr)
+ self._ptr = NULL
+
+ def __eq__(self, rhs):
+ return type(rhs) == Env and serd_env_equals(self._ptr, (<Env>rhs)._ptr)
+
+ def base_uri(self) -> Node:
+ """Return the current base URI."""
+ return Node._wrap(serd_env_base_uri(self._ptr))
+
+ def set_base_uri(self, uri) -> Status:
+ """Set the current base URI."""
+ if uri is None:
+ return Status(serd_env_set_base_uri(self._ptr, _empty_string))
+
+ uri_view = _uri_from_param(uri).string_view()
+ return Status(serd_env_set_base_uri(self._ptr, uri_view))
+
+ def set_prefix(self, name, uri: Node) -> Status:
+ """Set a namespace prefix.
+
+ A namespace prefix is used to expand CURIE nodes, for example, with the
+ prefix "xsd" set to "http://www.w3.org/2001/XMLSchema#", "xsd:decimal"
+ will expand to "http://www.w3.org/2001/XMLSchema#decimal".
+ """
+ name_node = string(name) if type(name) == str else name
+ name_view = name_node.string_view()
+ uri_view = uri.string_view()
+ assert type(name_node) == Node
+ return Status(serd_env_set_prefix(self._ptr, name_view, uri_view))
+
+ def qualify(self, uri: Node) -> Node:
+ """Qualify `uri` into a CURIE if possible.
+
+ Returns null if `uri` can not be qualified (usually because no
+ corresponding prefix is defined).
+ """
+ return Node._manage(serd_env_qualify(self._ptr, uri._ptr))
+
+ def expand(self, node: Node) -> Node:
+ """Expand `node`, transforming CURIEs into URIs
+
+ If `node` is a relative URI reference, it is expanded to a full URI if
+ possible. If `node` is a literal, its datatype is expanded if
+ necessary. If `node` is a CURIE, it is expanded to a full URI if
+ possible.
+
+ Returns None if `node` can not be expanded.
+ """
+ return Node._manage(serd_env_expand(self._ptr, node._ptr))
+
+
+class ReadContext(object):
+ def __init__(self, reader, source):
+ self.reader = reader
+ self.source = source
+
+ def __enter__(self):
+ _ensure_success(self.reader.start(self.source),
+ "Failed to start reading")
+ return self
+
+ def __exit__(self, type, value, traceback) -> None:
+ _ensure_success(self.reader.finish(), "Failed to finish reading")
+
+ def read_chunk(self) -> None:
+ _ensure_success(self.reader.read_chunk(), "Failed to read chunk")
+
+ def read_document(self) -> None:
+ _ensure_success(self.reader.read_document(), "Failed to read document")
+
+
+cdef class Reader:
+ """Streaming parser that reads a text stream and writes to a sink.
+
+ .. py:function:: serd.Reader(world: serd.World, syntax: serd.Syntax, flags: serd.ReaderFlags, env: serd.Env, sink, stack_size: int = 4096)
+
+ Construct a new reader.
+
+ The `sink` can be either a :class:`serd.Sink`, a built-in sink (for
+ example, from :meth:`serd.Writer.sink()` or :meth:`serd.Model.inserter`),
+ or a function that takes a :class:`serd.Event` and returns a
+ :class:`serd.Status`.
+ """
+
+ cdef SerdReader* _ptr
+ cdef __ByteSource _byte_source
+ cdef _SinkBase _sink
+ cdef object _callback
+
+ @staticmethod
+ cdef Reader _manage(SerdReader* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Reader wrapper = Reader.__new__(Reader)
+ wrapper._ptr = ptr
+ return wrapper
+
+ def __init__(self,
+ world: World,
+ syntax: Syntax,
+ flags: ReaderFlags,
+ env: Env,
+ sink,
+ stack_size: int = 4096):
+ if isinstance(sink, _SinkBase):
+ self._sink = sink
+ else:
+ self._callback = sink
+ self._sink = Sink(func=self._callback)
+
+ assert isinstance(self._sink, _SinkBase)
+ assert self._sink._cptr is not NULL
+
+ self._ptr = serd_reader_new(world._ptr,
+ syntax,
+ flags,
+ env._ptr,
+ (<_SinkBase>self._sink)._cptr,
+ stack_size)
+
+ def __dealloc__(self):
+ serd_reader_free(self._ptr)
+ self._ptr = NULL
+
+ def add_blank_prefix(self, prefix: str) -> None:
+ """Set a prefix to be added to all blank node identifiers.
+
+ This is useful when multiple files are to be parsed into the same
+ output (a model or a file). Since Serd preserves blank node IDs, this
+ could cause conflicts where two non-equivalent blank nodes are merged,
+ resulting in corrupt data. By setting a unique blank node prefix for
+ each parsed file, this can be avoided, while preserving blank node
+ names.
+ """
+ serd_reader_add_blank_prefix(self._ptr, prefix)
+
+ def start(self, byte_source: __ByteSource) -> Status:
+ """Prepare to read from a byte source."""
+ return Status(serd_reader_start(self._ptr, byte_source._ptr))
+
+ def read_chunk(self) -> Status:
+ """Read a single "chunk" of data during an incremental read.
+
+ This function will read a single top level description, and return.
+ This may be a directive, statement, or several statements; essentially
+ it reads until a '.' is encountered. This is particularly useful for
+ reading directly from a pipe or socket.
+ """
+ return Status(serd_reader_read_chunk(self._ptr))
+
+ def read_document(self) -> Status:
+ """Read a complete document from the source.
+
+ This function will continue pulling from the source until a complete
+ document has been read. Note that this may block when used with
+ streams, for incremental reading use serd_reader_read_chunk().
+ """
+ return Status(serd_reader_read_document(self._ptr))
+
+ def finish(self) -> Status:
+ """Finish reading from the source.
+
+ This should be called before starting to read from another source.
+ Finish reading from the source.
+ """
+ return Status(serd_reader_finish(self._ptr))
+
+ def open(self, source) -> ReadContext:
+ return ReadContext(self, source)
+
+
+cdef class __ByteSource:
+ """A source for bytes that provides text input."""
+ cdef SerdByteSource* _ptr
+
+ def __dealloc__(self):
+ serd_byte_source_free(self._ptr)
+ self._ptr = NULL
+
+
+cdef class FileSource(__ByteSource):
+ """A byte source for text input that reads from a file."""
+ def __init__(self, filename: str, block_size: int = 4096):
+ super().__init__()
+ self._ptr = serd_byte_source_new_filename(_tocstr(filename), block_size)
+
+
+cdef class StringSource(__ByteSource):
+ cdef bytes _bytes
+
+ """A byte source for text input that reads from a string."""
+ def __init__(self, string: str, name: Node = None):
+ super().__init__()
+ self._bytes = _tocstr(string)
+ self._ptr = serd_byte_source_new_string(self._bytes,
+ _unwrap_node(name))
+
+
+cdef class ByteSink:
+ """A sink for bytes that receives text output."""
+ cdef SerdByteSink* _ptr
+
+ def __dealloc__(self):
+ serd_byte_sink_free(self._ptr)
+ self._ptr = NULL
+
+ def flush(self) -> None:
+ """Flush any pending output to the underlying stream."""
+ serd_byte_sink_flush(self._ptr)
+
+ def close(self) -> None:
+ """Close sink, including the underlying file if necessary."""
+ serd_byte_sink_close(self._ptr)
+
+
+cdef class FileSink(ByteSink):
+ """A sink for bytes that writes text output to a file."""
+
+ def __init__(self,
+ filename: str,
+ block_size: int = 4096):
+ super().__init__()
+
+ self._ptr = serd_byte_sink_new_filename(_tocstr(filename),
+ block_size)
+
+ if self._ptr is NULL:
+ raise OSError(errno, strerror(errno), filename)
+
+
+cdef class StringSink(ByteSink):
+ cdef SerdBuffer _buffer
+
+ def __dealloc__(self):
+ serd_free(self._buffer.buf)
+ self._buffer.buf = NULL
+ self._buffer.len = 0;
+ # super().__dealloc__(self)
+
+ def __init__(self):
+ super().__init__()
+
+ self._buffer.buf = NULL
+ self._buffer.len = 0;
+ self._ptr = serd_byte_sink_new_buffer(&self._buffer)
+
+ def output(self) -> str:
+ self.flush()
+ return _fromcstr(serd_buffer_sink_finish(&self._buffer))
+
+
+cdef class Writer:
+ """Streaming serialiser that writes a text stream as statements are pushed.
+ """
+
+ cdef SerdWriter* _ptr
+
+ def __init__(self,
+ world: World,
+ syntax: Syntax,
+ flags: WriterFlags,
+ env: Env,
+ byte_sink: ByteSink):
+ self._ptr = serd_writer_new(
+ world._ptr,
+ syntax,
+ flags,
+ env._ptr if env is not None else NULL,
+ byte_sink._ptr,
+ )
+
+ def __dealloc__(self):
+ serd_writer_free(self._ptr)
+ self._ptr = NULL
+
+ def sink(self) -> SinkView:
+ """Return a sink interface that emits statements via this writer."""
+ return SinkView._wrap(serd_writer_sink(self._ptr))
+
+ def chop_blank_prefix(self, prefix: str):
+ """Set a prefix to be removed from matching blank node identifiers.
+
+ This is the counterpart to :meth:`serd.Reader.add_blank_prefix()` and
+ can be used to "undo" added prefixes.
+ """
+ serd_writer_chop_blank_prefix(self._ptr, prefix._ptr)
+
+ def set_base_uri(self, uri: Node) -> Status:
+ """Set the current output base URI, and emit a directive if applicable.
+ """
+ return Status(serd_writer_set_base_uri(self._ptr, uri._ptr))
+
+ def set_root_uri(self, uri: Node) -> Status:
+ """Set the current root URI.
+
+ The root URI should be a prefix of the base URI. The path of the root
+ URI is the highest path any relative up-reference can refer to. For
+ example, with root <file:///foo/root> and base <file:///foo/root/base>,
+ <file:///foo/root> will be written as <../>, but <file:///foo> will be
+ written non-relatively as <file:///foo>. If the root is not explicitly
+ set, it defaults to the base URI, so no up-references will be created
+ at all.
+ """
+ return Status(serd_writer_set_root_uri(self._ptr, uri._ptr))
+
+ def finish(self) -> Status:
+ """Finish a write.
+
+ This flushes any pending output, for example terminating punctuation,
+ so that the output is a complete document.
+ """
+ return Status(serd_writer_finish(self._ptr))
+
+
+class SerdError(RuntimeError):
+ def __init__(self, status: Status, message: str = ""):
+ if message:
+ super().__init__("%s (%s)" % (message, strerror(status)))
+ else:
+ super().__init__(strerror(status))
+
+ self.status = status
+
+
+def _ensure_success(status: Status, message: str = ""):
+ if status != Status.SUCCESS:
+ raise SerdError(status, message)
+
+
+cdef class Model:
+ """An indexed set of statements."""
+ cdef SerdModel* _ptr
+ cdef World _world
+
+ def __init__(self,
+ world: World,
+ flags: ModelFlags = ModelFlags.INDEX_SPO,
+ model: Model = None):
+ if model is not None:
+ self._world = world
+ self._ptr = serd_model_copy(model._ptr)
+ elif type(world) == World and type(flags) == ModelFlags:
+ self._world = world
+ self._ptr = serd_model_new(world._ptr, flags)
+ else:
+ raise TypeError("Bad arguments for Model()")
+
+ def __dealloc__(self):
+ serd_model_free(self._ptr)
+ self._world = None
+ self._ptr = NULL
+
+ def __eq__(self, rhs):
+ return (type(rhs) == Model and
+ serd_model_equals(self._ptr, (<Model>rhs)._ptr))
+
+ def __len__(self):
+ return self.size()
+
+ def __iter__(self):
+ if self.size() == 0:
+ return _Iter._end()
+
+ return _Iter._manage(serd_model_begin(self._ptr))
+
+ def __contains__(self, statement):
+ return self._find(Statement._from_param(statement)) != self._end()
+
+ def __delitem__(self, statement):
+ i = self._find(statement)
+ if i is not None:
+ self.erase(i)
+
+ def __add__(self: Model, statement_param):
+ statement = Statement._from_param(statement_param)
+ status = serd_model_insert(self._ptr, (<Statement>statement)._ptr)
+ _ensure_success(status)
+
+ return self
+
+ def world(self) -> World:
+ return self._world
+
+ def copy(self) -> Model:
+ return Model(self.world(), self.flags(), self)
+
+ def flags(self) -> ModelFlags:
+ """Get the flags enabled on this model."""
+ return ModelFlags(serd_model_flags(self._ptr))
+
+ def size(self) -> int:
+ """Return the number of statements stored in this model."""
+ return serd_model_size(self._ptr)
+
+ def empty(self) -> bool:
+ """Return true iff there are no statements in this model."""
+ return serd_model_empty(self._ptr)
+
+ def inserter(self, env: Env, default_graph: Node = None) -> Sink:
+ """Return a sink that will insert into this model when written to."""
+ return Sink._manage(serd_inserter_new(
+ self._ptr, env._ptr, _unwrap_node(default_graph)
+ ))
+
+ def insert(self, arg) -> None:
+ """Insert a Statement or Range into this model."""
+ if type(arg) == Range:
+ return Status(serd_model_add_range(self._ptr, (<Range>arg)._ptr))
+
+ statement = Statement._from_param(arg)
+ st = serd_model_insert(self._ptr, (<Statement>statement)._ptr)
+ _ensure_success(st)
+
+ def erase(self, arg) -> Status:
+ """Erase a statement or range from the model.
+
+ The argument can be a range, iterator, statement, or tuple of nodes.
+ """
+
+ if type(arg) == Range:
+ _ensure_success(
+ serd_model_erase_range(self._ptr, (<Range>arg)._ptr),
+ "Failed to erase range")
+ elif type(arg) == _Iter:
+ # FIXME: remove?
+ _ensure_success(
+ serd_model_erase(self._ptr, (<_Iter>arg)._ptr),
+ "Failed to erase iterator")
+ elif type(arg) == Statement:
+ i = self._find(arg)
+ if i == self._end():
+ raise ValueError("serd.Model.erase(): statement not in model")
+
+ self.erase(i)
+ elif type(arg) == tuple:
+ self.erase(Statement._from_param(arg))
+ else:
+ raise TypeError("Bad argument type for Model.erase: %s" % type(arg))
+
+ # def begin(self) -> _Iter:
+ # return _Iter._manage(serd_model_begin(self._ptr))
+
+ def _end(self) -> _Iter:
+ return _Iter._wrap(serd_model_end(self._ptr))
+
+ def all(self) -> Range:
+ """Return a range that contains all statements in the model."""
+ return Range._manage(serd_model_all(self._ptr))
+
+ def _find(self, statement) -> _Iter:
+ statement = Statement._from_param(statement)
+ s = statement.subject()
+ p = statement.predicate()
+ o = statement.object()
+ g = statement.graph()
+
+ c_iter = serd_model_find(
+ self._ptr,
+ _unwrap_node(s),
+ _unwrap_node(p),
+ _unwrap_node(o),
+ _unwrap_node(g)
+ )
+
+ return _Iter._manage(c_iter) if c_iter else self._end()
+
+ def range(self, pattern) -> Range:
+ """Return a range of statements that match a pattern."""
+ assert type(pattern) == tuple
+ assert len(pattern) == 3 or len(pattern) == 4
+
+ s = pattern[0]
+ p = pattern[1]
+ o = pattern[2]
+ g = pattern[3] if len(pattern) == 4 else None
+
+ return Range._manage(
+ serd_model_range(
+ self._ptr,
+ _unwrap_node(s),
+ _unwrap_node(p),
+ _unwrap_node(o),
+ _unwrap_node(g)
+ )
+ )
+
+ def get(self,
+ subject: Node = None,
+ predicate: Node = None,
+ object: Node = None,
+ graph: Node = None) -> Node:
+ return Node._wrap(
+ serd_model_get(
+ self._ptr,
+ _unwrap_node(subject),
+ _unwrap_node(predicate),
+ _unwrap_node(object),
+ _unwrap_node(graph)
+ )
+ )
+
+ def ask(self, s: Node, p: Node, o: Node, g: Node = None) -> bool:
+ """Return true iff the model contains a statement matching a pattern.
+
+ None can be used as a wildcard which matches any node.
+ """
+ return serd_model_ask(
+ self._ptr,
+ _unwrap_node(s),
+ _unwrap_node(p),
+ _unwrap_node(o),
+ _unwrap_node(g)
+ )
+
+ def count(self, s: Node, p: Node, o: Node, g: Node = None) -> int:
+ """Return the number of statements in the model that match a pattern.
+
+ None can be used as a wildcard which matches any node.
+ """
+ return serd_model_count(
+ self._ptr,
+ _unwrap_node(s),
+ _unwrap_node(p),
+ _unwrap_node(o),
+ _unwrap_node(g)
+ )
+
+
+# cdef class Inserter:
+# """A statement sink that inserts into a model."""
+# cdef SerdInserter* _ptr
+
+# @staticmethod
+# cdef Inserter _manage(SerdInserter* ptr):
+# if ptr is NULL:
+# return None
+
+# cdef Inserter wrapper = Inserter.__new__(Inserter)
+# wrapper._ptr = ptr
+# return wrapper
+
+# def __init__(self, model: Model, env: Env, default_graph: Node = None):
+# self._ptr = serd_inserter_new(
+# model._ptr, env._ptr, _unwrap_node(default_graph)
+# )
+
+# def __dealloc__(self):
+# serd_inserter_free(self._ptr)
+# self._ptr = NULL
+
+# def sink(self) -> SinkView:
+# return SinkView._wrap(serd_inserter_get_sink(self._ptr))
+
+
+cdef class Statement:
+ """An RDF statement.
+
+ .. py:function:: serd.serd.Statement(subject: serd.Node, predicate: serd.Node, object: serd.Node, graph: serd.Node = None, cursor: serd.Cursor = None)
+
+ Construct a new statement.
+ """
+
+ cdef SerdStatement* _ptr
+ cdef Node _subject
+ cdef Node _predicate
+ cdef Node _object
+ cdef Node _graph
+ cdef Cursor _cursor
+
+ @staticmethod
+ cdef Statement _manage(SerdStatement* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Statement wrapper = Statement.__new__(Statement)
+ wrapper._ptr = ptr
+ return wrapper
+
+ @staticmethod
+ cdef Statement _wrap(const SerdStatement* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Statement wrapper = Statement.__new__(Statement)
+ wrapper._subject = Node._wrap(serd_statement_subject(ptr))
+ wrapper._predicate = Node._wrap(serd_statement_predicate(ptr))
+ wrapper._object = Node._wrap(serd_statement_object(ptr))
+ wrapper._graph = Node._wrap(serd_statement_graph(ptr))
+ wrapper._cursor = Cursor._wrap(serd_statement_cursor(ptr))
+ wrapper._ptr = serd_statement_new(
+ _unwrap_node(wrapper._subject),
+ _unwrap_node(wrapper._predicate),
+ _unwrap_node(wrapper._object),
+ _unwrap_node(wrapper._graph),
+ (<Cursor>wrapper._cursor)._ptr if wrapper._cursor is not None else NULL)
+
+ return wrapper
+
+ @staticmethod
+ def _from_param(obj):
+ if type(obj) == Statement:
+ return obj
+
+ if type(obj) == tuple:
+ if len(obj) != 3 and len(obj) != 4:
+ raise ValueError("Bad number of statement fields")
+
+ for i in range(len(obj)):
+ if type(obj[i]) != Node:
+ raise TypeError("Bad type for statement field " + i)
+
+ g = obj[3] if len(obj) == 4 else None
+ return Statement(obj[0], obj[1], obj[2], g)
+
+ raise TypeError("Bad argument type for Statement: %s" % type(obj))
+
+ def __init__(
+ self,
+ subject: Node,
+ predicate: Node,
+ object: Node,
+ graph: Node = None,
+ cursor: Cursor = None,
+ ):
+ self._subject = <Node>subject
+ self._predicate = <Node>predicate
+ self._object = <Node>object
+ self._graph = <Node>graph
+ self._cursor = <Cursor>cursor
+
+ self._ptr = serd_statement_new(
+ _unwrap_node(self._subject),
+ _unwrap_node(self._predicate),
+ _unwrap_node(self._object),
+ _unwrap_node(self._graph),
+ (<Cursor>self._cursor)._ptr if self._cursor is not None else NULL,
+ )
+
+ def __dealloc__(self):
+ serd_statement_free(self._ptr)
+ self._ptr = NULL
+
+ def __getitem__(self, field):
+ if field < 0 or field > 3 or (field == 3 and self.graph() is None):
+ raise IndexError(field)
+
+ return self.node(field)
+
+ def __eq__(self, rhs):
+ return type(rhs) == Statement and serd_statement_equals(
+ self._ptr, (<Statement>rhs)._ptr
+ )
+
+ def __str__(self):
+ result = " ".join(
+ [
+ self.subject().to_syntax(),
+ self.predicate().to_syntax(),
+ self.object().to_syntax(),
+ ]
+ )
+
+ if serd_statement_graph(self._ptr) is not NULL:
+ result += " " + self.graph().to_syntax()
+
+ return result
+
+ def __repr__(self):
+ args = [repr(self.subject()),
+ repr(self.predicate()),
+ repr(self.object())]
+
+ if self.graph() is not None:
+ args += [repr(self.graph())]
+
+ if self.cursor() is not None:
+ args += [repr(self.cursor())]
+
+ return "serd.Statement({})".format(", ".join(args))
+
+ def matches(self, s: Node, p: Node, o: Node, g: Node = None):
+ """Return true iff this statement matches the given pattern.
+
+ Nodes match if they are equivalent, or if one of them is NULL. The
+ statement matches if every node matches.
+ """
+ return serd_statement_matches(
+ self._ptr,
+ s._ptr if s is not None else NULL,
+ p._ptr if p is not None else NULL,
+ o._ptr if o is not None else NULL,
+ g._ptr if g is not None else NULL,
+ )
+
+ def node(self, field: Field) -> Node:
+ """Return a node in this statement."""
+ assert field >= Field.SUBJECT and field <= Field.GRAPH
+ return Node._wrap(serd_statement_node(self._ptr, field))
+
+ def subject(self) -> Node:
+ """Return the subject node of this statement."""
+ return Node._wrap(serd_statement_subject(self._ptr))
+
+ def predicate(self) -> Node:
+ """Return the predicate node of this statement."""
+ return Node._wrap(serd_statement_predicate(self._ptr))
+
+ def object(self) -> Node:
+ """Return the object node in this statement."""
+ return Node._wrap(serd_statement_object(self._ptr))
+
+ def graph(self) -> Node:
+ """Return the graph node in this statement."""
+ return Node._wrap(serd_statement_graph(self._ptr))
+
+ def cursor(self) -> Cursor:
+ """Return the file location this statement came from, or None."""
+ return Cursor._wrap(serd_statement_cursor(self._ptr))
+
+
+cdef class _Iter:
+ """An iterator that points to a statement in a model."""
+ cdef SerdIter* _ptr
+ cdef bint _is_end
+
+ @staticmethod
+ cdef _end():
+ cdef _Iter wrapper = _Iter.__new__(_Iter)
+
+ wrapper._ptr = NULL
+ wrapper._is_end = True
+
+ return wrapper
+
+ @staticmethod
+ cdef _manage(SerdIter* ptr):
+ cdef _Iter wrapper = _Iter.__new__(_Iter)
+
+ if ptr is NULL:
+ wrapper._ptr = NULL
+ wrapper._is_end = True
+ else:
+ wrapper._ptr = ptr
+ wrapper._is_end = False
+
+ return wrapper
+
+ @staticmethod
+ cdef _wrap(const SerdIter* ptr):
+ return _Iter._manage(serd_iter_copy(ptr))
+
+ def __init__(self, iter: _Iter):
+ assert type(iter) == _Iter
+
+ self._is_end = False
+ self._ptr = serd_iter_copy(iter._ptr)
+ self._is_end = iter._is_end
+
+ def __dealloc__(self):
+ serd_iter_free(self._ptr)
+ self._ptr = NULL
+
+ def __eq__(self, rhs):
+ return type(rhs) == _Iter and serd_iter_equals(self._ptr, (<_Iter>rhs)._ptr)
+
+ def __next__(self):
+ """Move to and return the next item."""
+ if self._is_end:
+ raise StopIteration
+
+ item = serd_iter_get(self._ptr)
+ self._is_end = serd_iter_next(self._ptr)
+
+ return Statement._wrap(item)
+
+ def get(self) -> Statement:
+ """Get the current item."""
+ return Statement._wrap(serd_iter_get(self._ptr))
+
+
+cdef class Range:
+ """A range of statements in a model.
+
+ This class is iterable so it can be used like a collection. For example,
+ :meth:`serd.Model.all()` returns a range, so all the statements in a model
+ can be printed like so::
+
+ for statement in model.all():
+ print(statement)
+
+ A range is "truthy" if it is non-empty.
+ """
+ cdef SerdRange* _ptr
+
+ @staticmethod
+ cdef _manage(SerdRange* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Range wrapper = Range.__new__(Range)
+ wrapper._ptr = ptr
+ return wrapper
+
+ @staticmethod
+ cdef _wrap(const SerdRange* ptr):
+ return Range._manage(serd_range_copy(ptr))
+
+ def __init__(self, range: Range):
+ assert type(range) == Range
+ self._ptr = serd_range_copy((<Range>range)._ptr)
+
+ def __dealloc__(self):
+ serd_range_free(self._ptr)
+ self._ptr = NULL
+
+ def __bool__(self):
+ return not self.empty()
+
+ def __eq__(self, rhs):
+ return type(rhs) == Range and serd_range_equals(self._ptr, (<Range>rhs)._ptr)
+
+ def __iter__(self):
+ if self.empty():
+ return _Iter._end()
+
+ return _Iter._wrap(serd_range_begin(self._ptr))
+
+ def front(self) -> Statement:
+ """Return the first statement in this range, or None."""
+ return Statement._wrap(serd_range_front(self._ptr))
+
+ def empty(self) -> bool:
+ """Return true iff there are no statements in this range."""
+ return serd_range_empty(self._ptr)
+
+ def serialise(self, sink: _SinkBase, flags: SerialisationFlags) -> Status:
+ """Write this range to `sink`.
+
+ The serialisation style can be controlled with `flags`. The default is
+ to write statements in an order suited for pretty-printing with Turtle
+ or TriG with as many objects written inline as possible. If
+ `SerialisationFlags.NO_INLINE_OBJECTS` is given, a simple sorted stream
+ is written instead, which is significantly faster since no searching is
+ required, but can result in ugly output for Turtle or Trig.
+ """
+ return Status(serd_range_serialise(self._ptr, sink._cptr, flags))
+
+
+cdef class Cursor:
+ """The origin of a statement in a document."""
+ cdef SerdCursor* _ptr
+ cdef Node _name_node
+
+ @staticmethod
+ cdef Cursor _manage(SerdCursor* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Cursor wrapper = Cursor.__new__(Cursor)
+ wrapper._ptr = ptr
+ return wrapper
+
+ @staticmethod
+ cdef Cursor _wrap(const SerdCursor* ptr):
+ return Cursor._manage(serd_cursor_copy(ptr))
+
+ def __init__(self, name, line: uint = 1, col: uint = 0):
+ if type(name) == Node:
+ self._name_node = <Node>name
+ self._ptr = serd_cursor_new((<Node>self._name_node)._ptr, line, col)
+ elif type(name) == str:
+ self._name_node = string(name)
+ self._ptr = serd_cursor_new((<Node>self._name_node)._ptr, line, col)
+ else:
+ raise TypeError("Bad name argument type for Cursor(): %s" % type(name))
+
+
+ def __dealloc__(self):
+ serd_cursor_free(self._ptr)
+ self._ptr = NULL
+
+ def __eq__(self, rhs):
+ return (type(rhs) == Cursor and
+ serd_cursor_equals(self._ptr, (<Cursor>rhs)._ptr))
+
+ def __str__(self):
+ return "{}:{}:{}".format(self.name(), self.line(), self.column())
+
+ def __repr__(self):
+ return "serd.Cursor({})".format(
+ ", ".join([repr(self.name()), str(self.line()), str(self.column())]))
+
+ def name(self) -> Node:
+ """Return the document name.
+
+ This is typically a file URI, but may be a descriptive string node for
+ statements that originate from strings or streams.
+ """
+
+ return Node._wrap(serd_cursor_name(self._ptr))
+
+ def line(self) -> int:
+ """Return the one-relative line number in the document."""
+ return serd_cursor_line(self._ptr)
+
+ def column(self) -> int:
+ """Return the zero-relative column number in the line."""
+ return serd_cursor_column(self._ptr)
+
+
+cdef class Event:
+ """An event in a data stream.
+
+ Streams of data are represented as a series of events. Events represent
+ everything that can occur in an RDF document, and are used to plumb
+ together different components. For example, when parsing a document, a
+ reader emits a stream of events which can be sent to a writer to serialise
+ a document, or to an inserter to build a model in memory.
+ """
+
+ cdef SerdEvent* _ptr
+ cdef SerdEventType _type
+ cdef Node _name
+ cdef Node _uri
+ cdef SerdStatementFlags _flags
+ cdef Statement _statement
+ cdef Node _node
+
+ @staticmethod
+ cdef Event _wrap(const SerdEvent* ptr):
+ event = Event()
+ event._type = ptr.type
+
+ if event._type == EventType.BASE:
+ base_event = <const SerdBaseEvent*>ptr
+ event._uri = Node._wrap(base_event.uri)
+ elif event._type == EventType.PREFIX:
+ prefix_event = <const SerdPrefixEvent*>ptr
+ event._name = Node._wrap(prefix_event.name)
+ event._uri = Node._wrap(prefix_event.uri)
+ elif event._type == EventType.STATEMENT:
+ statement_event = <const SerdStatementEvent*>ptr
+ event._flags = StatementFlags(statement_event.flags)
+ event._statement = Statement._wrap(statement_event.statement)
+ elif event._type == EventType.END:
+ end_event = <const SerdEndEvent*>ptr
+ event._node = Node._wrap(end_event.node)
+ else:
+ return None
+
+ return event
+
+ @staticmethod
+ def base(base_uri):
+ """Return an event that sets the base URI."""
+ event = Event()
+ event._type = EventType.BASE
+ event._uri = _uri_from_param(base_uri)
+ return event
+
+ @staticmethod
+ def prefix(name, namespace_uri):
+ """Return an event that sets a namespace prefix."""
+ event = Event()
+ event._type = EventType.PREFIX
+ event._name = string(name)
+ event._uri = _uri_from_param(namespace_uri)
+ return event
+
+ @staticmethod
+ def statement(statement, flags: StatementFlags = StatementFlags(0)):
+ """Return an event that represents a statement."""
+ assert type(statement) == Statement
+
+ event = Event()
+ event._type = EventType.STATEMENT
+ event._statement = Statement._from_param(statement)
+ event._flags = StatementFlags(flags)
+ return event
+
+ @staticmethod
+ def end(node):
+ """Return an event that ends an anonymous node description."""
+ event = Event()
+ event._type = EventType.END
+ event._node = _blank_from_param(node)
+ return event
+
+ def __eq__(self, rhs):
+ if type(rhs) != Event:
+ return False
+
+ other = <Event>rhs
+ if self._type != other._type:
+ return False
+ elif self._type == EventType.BASE:
+ return self._uri == other._uri
+ elif self._type == EventType.PREFIX:
+ return (self._name, self._uri) == (other._name, other._uri)
+ elif self._type == EventType.STATEMENT:
+ return (self._statement, self._flags) == (other._statement, other._flags)
+ elif self._type == EventType.END:
+ return self._node == other._node
+
+ return False
+
+ def __repr__(self):
+ def flags_repr(flags):
+ active = []
+ for f in [StatementFlags.EMPTY_S,
+ StatementFlags.ANON_S,
+ StatementFlags.ANON_O,
+ StatementFlags.LIST_S,
+ StatementFlags.LIST_O,
+ StatementFlags.TERSE_S,
+ StatementFlags.TERSE_O]:
+ if flags & f:
+ active += ['serd.' + str(f)]
+
+ return ' | '.join(active)
+
+ if self._type == EventType.BASE:
+ return 'serd.Event.base("%s")' % self._uri
+ elif self._type == EventType.PREFIX:
+ return 'serd.Event.prefix("%s", "%s")' % (self._name, self._uri)
+ elif self._type == EventType.STATEMENT:
+ result = 'serd.Event.statement(%s' % repr(self._statement)
+ if self._flags:
+ result += ', %s' % flags_repr(self._flags)
+
+ return result + ')'
+ elif self._type == EventType.END:
+ return 'serd.Event.end(%s)' % repr(self._node)
+
+ return "None"
+
+
+cdef class _SinkBase:
+ cdef const SerdSink* _cptr
+
+
+cdef class SinkView(_SinkBase):
+ @staticmethod
+ cdef SinkView _wrap(const SerdSink* cptr):
+ if cptr is NULL:
+ return None
+
+ cdef SinkView wrapper = SinkView.__new__(SinkView)
+ wrapper._cptr = cptr
+ return wrapper
+
+
+cdef class Sink(_SinkBase):
+ cdef SerdSink* _ptr
+ cdef Env _env
+ cdef object _func
+
+ @staticmethod
+ cdef Sink _manage(SerdSink* ptr):
+ if ptr is NULL:
+ return None
+
+ cdef Sink wrapper = Sink.__new__(Sink)
+ wrapper._cptr = ptr
+ wrapper._ptr = ptr
+ return wrapper
+
+ def __init__(self: Sink, func: callable = None):
+ if func is not None:
+ self._env = Env()
+ self._func = func
+ self._ptr = serd_sink_new(<void*>self, Sink._c_on_event, NULL)
+ self._cptr = self._ptr
+ # TODO: get_env?
+ else:
+ self._env = Env()
+ self._func = None
+ self._ptr = serd_sink_new(<void*>self, Sink._c_on_event, NULL)
+ self._cptr = self._ptr
+ # TODO: get_env?
+
+ def __dealloc__(self):
+ serd_sink_free(self._ptr)
+ self._ptr = NULL
+ self._cptr = NULL
+
+ def on_event(self, event: Event) -> Status:
+ return Status.SUCCESS
+
+ def __call__(self, event: Event) -> Status:
+ return self._func(event) if self._func is not None else Status.SUCCESS
+
+ @staticmethod
+ cdef SerdStatus _c_on_event(void* handle, const SerdEvent* event):
+ self = <Sink>handle
+ result = self.__call__(Event._wrap(event))
+ assert result is None or type(result) == Status
+ return result if result is not None else Status.SUCCESS
diff --git a/bindings/python/test_serd.py b/bindings/python/test_serd.py
new file mode 100644
index 00000000..9da487b9
--- /dev/null
+++ b/bindings/python/test_serd.py
@@ -0,0 +1,1132 @@
+# Copyright 2020 David Robillard <d@drobilla.net>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import base64
+import math
+import os
+import serd
+import shutil
+import tempfile
+import textwrap
+import unittest
+import itertools
+
+
+class NamespaceTests(unittest.TestCase):
+ def testConstruction(self):
+ with self.assertRaises(TypeError):
+ serd.Namespace()
+
+ with self.assertRaises(TypeError):
+ serd.Namespace(4)
+
+ with self.assertRaises(TypeError):
+ serd.Namespace(None)
+
+ ns1 = serd.Namespace(serd.uri("http://example.org"))
+ ns2 = serd.Namespace("http://example.org")
+
+ self.assertEqual(ns1, ns2)
+
+ def testComparison(self):
+ ns1 = serd.Namespace("http://example.org/a#")
+ ns2 = serd.Namespace("http://example.org/b#")
+
+ self.assertNotEqual(ns1, ns2)
+
+ self.assertEqual(ns1, serd.Namespace("http://example.org/a#"))
+ self.assertEqual(ns1, serd.uri("http://example.org/a#"))
+ self.assertEqual(ns1, "http://example.org/a#")
+
+ self.assertNotEqual(ns1, serd.uri("http://drobilla.net/a#"))
+ self.assertNotEqual(ns1, "http://drobilla.net/a#")
+
+ def testAdd(self):
+ ns = serd.Namespace("http://example.org/")
+
+ self.assertEqual(ns + "foo", "http://example.org/foo")
+ self.assertEqual(ns.foo, "http://example.org/foo")
+ self.assertEqual(ns["foo"], "http://example.org/foo")
+
+ def testName(self):
+ ns = serd.Namespace("http://example.org/")
+
+ self.assertEqual(ns.name("http://example.org/foo"), "foo")
+ self.assertEqual(ns.name(serd.uri("http://example.org/foo")), "foo")
+
+ self.assertIsNone(ns.name("http://drobilla.net/foo"))
+
+
+class StringTests(unittest.TestCase):
+ def testStrerror(self):
+ self.assertEqual(serd.strerror(serd.Status.SUCCESS), "Success")
+ self.assertEqual(serd.strerror(99999), "Unknown error")
+
+ with self.assertRaises(OverflowError):
+ serd.strerror(-1)
+
+ self.assertEqual(
+ serd.strerror(serd.Status.ERR_BAD_WRITE), "Error writing to file"
+ )
+
+
+# class Base64Tests(unittest.TestCase):
+# def testShortBase64(self):
+# data = "foobar".encode("utf-8")
+# encoded = "Zm9vYmFy"
+
+# self.assertEqual(serd.base64_encode(data), encoded)
+# self.assertEqual(serd.base64_encode(data, True), encoded)
+# self.assertEqual(serd.base64_decode(encoded), data)
+
+# def testLongBase64(self):
+# data = ("foobar" * 20).encode("utf-8")
+# oneline_encoded = "Zm9vYmFy" * 20
+# multiline_encoded = "\n".join(textwrap.wrap("Zm9vYmFy" * 20, width=76))
+
+# self.assertEqual(serd.base64_encode(data), oneline_encoded)
+# self.assertEqual(serd.base64_encode(data, True), multiline_encoded)
+# self.assertEqual(serd.base64_decode(oneline_encoded), data)
+# self.assertEqual(serd.base64_decode(multiline_encoded), data)
+
+
+class SyntaxTests(unittest.TestCase):
+ def testSyntaxByName(self):
+ self.assertEqual(serd.syntax_by_name("TuRtLe"), serd.Syntax.TURTLE)
+ self.assertEqual(serd.syntax_by_name("wat"), serd.Syntax.EMPTY)
+
+ def testGuessSyntax(self):
+ self.assertEqual(serd.guess_syntax("foo.nq"), serd.Syntax.NQUADS)
+ self.assertEqual(serd.guess_syntax("foo.txt"), serd.Syntax.EMPTY)
+
+ def testSyntaxHasGraphs(self):
+ self.assertFalse(serd.syntax_has_graphs(serd.Syntax.EMPTY))
+ self.assertFalse(serd.syntax_has_graphs(serd.Syntax.TURTLE))
+ self.assertFalse(serd.syntax_has_graphs(serd.Syntax.NTRIPLES))
+ self.assertTrue(serd.syntax_has_graphs(serd.Syntax.NQUADS))
+ self.assertTrue(serd.syntax_has_graphs(serd.Syntax.TRIG))
+
+
+class WorldTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+
+ def testGetBlank(self):
+ self.assertEqual(self.world.get_blank(), serd.blank("b1"))
+ self.assertEqual(self.world.get_blank(), serd.blank("b2"))
+
+
+class NodeTests(unittest.TestCase):
+ @staticmethod
+ def _throughSyntax(n):
+ return serd.Node.from_syntax(n.to_syntax())
+
+ def testConstruction(self):
+ self.assertEqual(serd.Node("hello"), serd.plain_literal("hello"))
+ self.assertEqual(serd.Node(False), serd.boolean(False))
+ self.assertEqual(serd.Node(True), serd.boolean(True))
+ self.assertEqual(serd.Node(42), serd.integer(42))
+ self.assertEqual(serd.Node(42.34), serd.double(42.34))
+
+ with self.assertRaises(ValueError):
+ serd.Node(-9223372036854775809)
+
+ with self.assertRaises(ValueError):
+ serd.Node(9223372036854775808)
+
+ def testString(self):
+ n = serd.string("hello")
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "hello")
+ self.assertEqual(len(n), 5)
+ self.assertEqual(repr(n), 'serd.string("hello")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testPlainLiteral(self):
+ n = serd.plain_literal("hallo", "de")
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "hallo")
+ self.assertEqual(len(n), 5)
+ self.assertEqual(repr(n), 'serd.plain_literal("hallo", "de")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertEqual(n.language(), serd.string("de"))
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_LANGUAGE)
+
+ def testTypedLiteral(self):
+ datatype = serd.uri("http://example.org/ns#Hex")
+ n = serd.typed_literal("ABCD", datatype)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "ABCD")
+ self.assertEqual(len(n), 4)
+ self.assertEqual(
+ repr(n), 'serd.typed_literal("ABCD", "http://example.org/ns#Hex")'
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), datatype)
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ def testBlank(self):
+ n = serd.blank("b0")
+ self.assertEqual(n.type(), serd.NodeType.BLANK)
+ self.assertEqual(n, "b0")
+ self.assertEqual(len(n), 2)
+ self.assertEqual(repr(n), 'serd.blank("b0")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testCurie(self):
+ n = serd.curie("ns:name")
+ self.assertEqual(n.type(), serd.NodeType.CURIE)
+ self.assertEqual(n, "ns:name")
+ self.assertEqual(len(n), 7)
+ self.assertEqual(repr(n), 'serd.curie("ns:name")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testUri(self):
+ n = serd.uri("http://example.org/")
+ self.assertEqual(n.type(), serd.NodeType.URI)
+ self.assertEqual(n, "http://example.org/")
+ self.assertEqual(len(n), 19)
+ self.assertEqual(repr(n), 'serd.uri("http://example.org/")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testRelativeUri(self):
+ n = serd.uri("rel/uri")
+ self.assertEqual(n.type(), serd.NodeType.URI)
+ self.assertEqual(n, "rel/uri")
+ self.assertEqual(len(n), 7)
+ self.assertEqual(repr(n), 'serd.uri("rel/uri")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ # def testResolvedUri(self):
+ # base = serd.uri("http://example.org/")
+ # n = serd.resolved_uri("name", base)
+ # self.assertEqual(n.type(), serd.NodeType.URI)
+ # self.assertEqual(n, "http://example.org/name")
+ # self.assertEqual(len(n), 23)
+ # self.assertEqual(repr(n), 'serd.uri("http://example.org/name")')
+ # self.assertEqual(n, eval(repr(n)))
+ # self.assertEqual(n, self._throughSyntax(n))
+ # self.assertIsNone(n.datatype())
+ # self.assertIsNone(n.language())
+ # self.assertEqual(n.flags(), 0)
+
+ def testLocalFileUri(self):
+ n = serd.file_uri("/foo/bar")
+ self.assertEqual(n.type(), serd.NodeType.URI)
+ self.assertEqual(n, "file:///foo/bar")
+ self.assertEqual(len(n), 15)
+ self.assertEqual(repr(n), 'serd.uri("file:///foo/bar")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testFileUriWithHostname(self):
+ n = serd.file_uri("/foo/bar", "host")
+ self.assertEqual(n.type(), serd.NodeType.URI)
+ self.assertEqual(n, "file://host/foo/bar")
+ print(n)
+ self.assertEqual(len(n), 19)
+ self.assertEqual(repr(n), 'serd.uri("file://host/foo/bar")')
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testDecimal(self):
+ xsd_decimal = "http://www.w3.org/2001/XMLSchema#decimal"
+
+ n = serd.decimal(12.34, None)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "12.34")
+ self.assertEqual(len(n), 5)
+ self.assertEqual(
+ repr(n),
+ 'serd.typed_literal("12.34", "http://www.w3.org/2001/XMLSchema#decimal")',
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_decimal))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ n = serd.decimal(12.34)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "12.34")
+ self.assertEqual(len(n), 5)
+ self.assertEqual(
+ repr(n), 'serd.typed_literal("12.34", "{}")'.format(xsd_decimal)
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_decimal))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ datatype = "http://example.org/ns#Decimal"
+ d = serd.decimal(1234, datatype=serd.uri(datatype))
+ self.assertEqual(d.datatype(), serd.uri(datatype))
+ self.assertEqual(d, "1234.0")
+ self.assertEqual(len(d), 6)
+ self.assertEqual(
+ repr(d), 'serd.typed_literal("1234.0", "%s")' % datatype
+ )
+ self.assertEqual(d, eval(repr(d)))
+ self.assertEqual(n, self._throughSyntax(n))
+
+ def testDouble(self):
+ xsd_double = "http://www.w3.org/2001/XMLSchema#double"
+ n = serd.double(12.34)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "1.234E1")
+ self.assertEqual(len(n), 7)
+ self.assertEqual(
+ repr(n), 'serd.typed_literal("1.234E1", "{}")'.format(xsd_double)
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_double))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ def testFloat(self):
+ xsd_float = "http://www.w3.org/2001/XMLSchema#float"
+ n = serd.float(234.5)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "2.345E2")
+ self.assertEqual(len(n), 7)
+ self.assertEqual(
+ repr(n), 'serd.typed_literal("2.345E2", "{}")'.format(xsd_float)
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_float))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ def testInteger(self):
+ xsd_integer = "http://www.w3.org/2001/XMLSchema#integer"
+ n = serd.integer(42)
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(n, "42")
+ self.assertEqual(len(n), 2)
+ self.assertEqual(
+ repr(n), 'serd.typed_literal("42", "{}")'.format(xsd_integer)
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_integer))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ datatype = "http://example.org/ns#Integer"
+ d = serd.decimal(1234, datatype=serd.uri(datatype))
+ self.assertEqual(d.datatype(), serd.uri(datatype))
+ self.assertEqual(d, "1234.0")
+ self.assertEqual(len(d), 6)
+ self.assertEqual(
+ repr(d), 'serd.typed_literal("1234.0", "{}")'.format(datatype)
+ )
+ self.assertEqual(d, eval(repr(d)))
+ self.assertEqual(n, self._throughSyntax(n))
+
+ def testBoolean(self):
+ xsd_boolean = "http://www.w3.org/2001/XMLSchema#boolean"
+ t = serd.boolean(True)
+ self.assertEqual(t.type(), serd.NodeType.LITERAL)
+ self.assertEqual(t, "true")
+ self.assertEqual(len(t), 4)
+ self.assertEqual(repr(t), "serd.boolean(True)")
+ self.assertEqual(t, eval(repr(t)))
+ self.assertEqual(t, self._throughSyntax(t))
+ self.assertEqual(t.datatype(), serd.uri(xsd_boolean))
+ self.assertIsNone(t.language())
+ self.assertEqual(t.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ f = serd.boolean(False)
+ self.assertEqual(f.type(), serd.NodeType.LITERAL)
+ self.assertEqual(f, "false")
+ self.assertEqual(len(f), 5)
+ self.assertEqual(repr(f), "serd.boolean(False)")
+ self.assertEqual(f, eval(repr(f)))
+ self.assertEqual(f, self._throughSyntax(f))
+ self.assertEqual(f.datatype(), serd.uri(xsd_boolean))
+ self.assertIsNone(f.language())
+ self.assertEqual(f.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ def testBlob(self):
+ xsd_base64Binary = "http://www.w3.org/2001/XMLSchema#base64Binary"
+ n = serd.blob(b"DEAD")
+ n_bytes = base64.b64encode(b"DEAD")
+ self.assertEqual(n.type(), serd.NodeType.LITERAL)
+ self.assertEqual(bytes(str(n), "utf-8"), n_bytes)
+ self.assertEqual(len(n), 8)
+ self.assertEqual(
+ repr(n),
+ 'serd.typed_literal("{}", "{}")'.format(
+ n_bytes.decode("utf-8"), xsd_base64Binary
+ ),
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(n.datatype(), serd.uri(xsd_base64Binary))
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ datatype = "http://example.org/ns#Blob"
+ t = serd.blob(b"BEEF", datatype=serd.uri(datatype))
+ t_bytes = base64.b64encode(b"BEEF")
+ self.assertEqual(t.type(), serd.NodeType.LITERAL)
+ self.assertEqual(bytes(str(t), "utf-8"), t_bytes)
+ self.assertEqual(len(t), 8)
+ self.assertEqual(
+ repr(t),
+ 'serd.typed_literal("{}", "{}")'.format(
+ t_bytes.decode("utf-8"), datatype
+ ),
+ )
+ self.assertEqual(n, eval(repr(n)))
+ self.assertEqual(n, self._throughSyntax(n))
+ self.assertEqual(t.datatype(), serd.uri(datatype))
+ self.assertIsNone(t.language())
+ self.assertEqual(t.flags(), serd.NodeFlags.HAS_DATATYPE)
+
+ def testVariable(self):
+ n = serd.variable("foo")
+ self.assertEqual(n.type(), serd.NodeType.VARIABLE)
+ self.assertEqual(n, "foo")
+ self.assertEqual(len(n), 3)
+ self.assertEqual(repr(n), 'serd.variable("foo")')
+ self.assertEqual(n, eval(repr(n)))
+ # self.assertEqual(n, self._throughSyntax(n))
+ self.assertIsNone(n.datatype())
+ self.assertIsNone(n.language())
+ self.assertEqual(n.flags(), 0)
+
+ def testComparison(self):
+ a = serd.string("Aardvark")
+ b = serd.string("Banana")
+
+ self.assertEqual(a, a)
+ self.assertNotEqual(a, b)
+ self.assertLess(a, b)
+ self.assertLessEqual(a, b)
+ self.assertLessEqual(a, a)
+ self.assertGreater(b, a)
+ self.assertGreaterEqual(b, a)
+ self.assertGreaterEqual(b, b)
+
+ def testHash(self):
+ nodes = [
+ serd.plain_literal("hello"),
+ serd.plain_literal("hello", "en"),
+ serd.typed_literal("hello", "http://example.org/hex"),
+ serd.blank("hello"),
+ serd.curie("eg:hello"),
+ serd.uri("http://example.org"),
+ ]
+
+ # Check that all node types have a distinct hash
+ for lhs, rhs in itertools.combinations(nodes, r=2):
+ self.assertNotEqual(hash(lhs), hash(rhs))
+
+ # Check that nodes work in a set
+ self.assertEqual(len(set(nodes)), len(nodes))
+
+
+class EnvTests(unittest.TestCase):
+ def testEquality(self):
+ uri = serd.uri("http://example.org/")
+ env1 = serd.Env()
+ env2 = serd.Env()
+ self.assertEqual(env1, env2)
+
+ env2.set_base_uri(uri)
+ self.assertNotEqual(env1, env2)
+
+ env2.set_base_uri(None)
+ self.assertEqual(env1, env2)
+
+ env2.set_prefix("eg", uri)
+ self.assertNotEqual(env1, env2)
+
+ env1.set_prefix(serd.string("eg"), uri)
+ self.assertEqual(env1, env2)
+
+ def testBaseUri(self):
+ env = serd.Env()
+ self.assertIsNone(env.base_uri())
+
+ base = serd.uri("http://example.org/")
+ env.set_base_uri(base)
+ self.assertEqual(env.base_uri(), base)
+
+ def testInitialBaseUri(self):
+ base = serd.uri("http://example.org/")
+ env = serd.Env(base)
+ self.assertEqual(env.base_uri(), base)
+
+ def testQualify(self):
+ base = serd.uri("http://example.org/")
+ uri = serd.uri("http://example.org/name")
+ env = serd.Env(base)
+
+ self.assertIsNone(env.qualify(uri))
+
+ env.set_prefix("eg", base)
+ self.assertEqual(env.qualify(uri), "eg:name")
+
+ def testExpand(self):
+ base = serd.uri("http://example.org/")
+ curie = serd.curie("eg:name")
+ env = serd.Env(base)
+
+ self.assertIsNone(env.expand(curie))
+
+ env.set_prefix("eg", base)
+ self.assertEqual(
+ env.expand(curie), serd.uri("http://example.org/name")
+ )
+
+
+class ModelTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+ self.s = serd.uri("http://example.org/s")
+ self.p = serd.uri("http://example.org/p")
+ self.o = serd.uri("http://example.org/o")
+ self.o1 = serd.uri("http://example.org/o1")
+ self.o2 = serd.uri("http://example.org/o2")
+ self.g = serd.uri("http://example.org/g")
+ self.x = serd.uri("http://example.org/x")
+
+ def testConstruction(self):
+ flags = serd.ModelFlags.INDEX_SPO | serd.ModelFlags.INDEX_GRAPHS
+ model = serd.Model(self.world, flags)
+ self.assertEqual(model.flags(), flags)
+ self.assertNotEqual(model.flags(), serd.ModelFlags.INDEX_SPO)
+ self.assertEqual(model.world(), self.world)
+
+ def testInsertErase(self):
+ model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ model.insert((self.s, self.p, self.o))
+ self.assertEqual(len(model), 1)
+ model.erase(iter(model))
+ self.assertEqual(len(model), 0)
+
+ statement = serd.Statement(self.s, self.p, self.o)
+ model += statement
+ self.assertEqual(len(model), 1)
+ del model[statement]
+ self.assertEqual(len(model), 0)
+
+ def testSize(self):
+ model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+ self.assertEqual(model.size(), 0)
+ self.assertEqual(len(model), 0)
+ self.assertTrue(model.empty())
+
+ model.insert((self.s, self.p, self.o))
+ self.assertEqual(model.size(), 1)
+ self.assertEqual(len(model), 1)
+ self.assertFalse(model.empty())
+
+ model.erase(iter(model))
+ self.assertEqual(model.size(), 0)
+ self.assertEqual(len(model), 0)
+ self.assertTrue(model.empty())
+
+ # def testBeginEnd(self):
+ # s, p, o, g = self.s, self.p, self.o, self.g
+ # model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ # self.assertEqual(model.begin(), model.end())
+
+ # model.insert((s, p, o, g))
+ # self.assertNotEqual(model.begin(), model.end())
+
+ # def testFind(self):
+ # s, p, o, g, x = self.s, self.p, self.o, self.g, self.x
+ # flags = serd.ModelFlags.INDEX_SPO | serd.ModelFlags.INDEX_GRAPHS
+ # model = serd.Model(self.world, flags)
+ # in_statement = serd.Statement(s, p, o, g)
+ # out_statement = serd.Statement(x, p, o, g)
+
+ # model += in_statement
+ # self.assertEqual(model.find(out_statement), model.end())
+ # self.assertNotEqual(model.find(in_statement), model.end())
+
+ def testGet(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ flags = serd.ModelFlags.INDEX_SPO | serd.ModelFlags.INDEX_GRAPHS
+ model = serd.Model(self.world, flags)
+
+ model.insert((s, p, o, g))
+ self.assertEqual(model.get(None, p, o, g), s)
+ self.assertEqual(model.get(s, None, o, g), p)
+ self.assertEqual(model.get(s, p, None, g), o)
+ self.assertEqual(model.get(s, p, o, None), g)
+
+ def testAsk(self):
+ s, p, o, g, x = self.s, self.p, self.o, self.g, self.x
+ flags = serd.ModelFlags.INDEX_SPO | serd.ModelFlags.INDEX_GRAPHS
+ model = serd.Model(self.world, flags)
+ model.insert((s, p, o, g))
+
+ self.assertTrue(model.ask(s, p, o, g))
+ self.assertIn(serd.Statement(s, p, o, g), model)
+ self.assertIn((s, p, o, g), model)
+
+ self.assertFalse(model.ask(x, p, o, g))
+ self.assertNotIn(serd.Statement(x, p, o, g), model)
+ self.assertNotIn((x, p, o, g), model)
+
+ self.assertTrue(model.ask(None, p, o, g))
+ self.assertTrue(model.ask(s, None, o, g))
+ self.assertTrue(model.ask(s, p, None, g))
+ self.assertTrue(model.ask(s, p, o, None))
+
+ self.assertFalse(model.ask(None, x, o, g))
+ self.assertFalse(model.ask(s, None, x, g))
+ self.assertFalse(model.ask(s, p, None, x))
+ self.assertFalse(model.ask(x, p, o, None))
+
+ def testCount(self):
+ s, p, o1, o2, g, x = self.s, self.p, self.o1, self.o2, self.g, self.x
+ flags = serd.ModelFlags.INDEX_SPO | serd.ModelFlags.INDEX_GRAPHS
+ model = serd.Model(self.world, flags)
+ model.insert((s, p, o1, g))
+ model.insert((s, p, o2, g))
+
+ self.assertEqual(model.count(s, p, o1, g), 1)
+ self.assertEqual(model.count(s, p, None, g), 2)
+ self.assertEqual(model.count(s, p, x, g), 0)
+
+
+class StatementTests(unittest.TestCase):
+ def setUp(self):
+ self.s = serd.uri("http://example.org/s")
+ self.p = serd.uri("http://example.org/p")
+ self.o = serd.uri("http://example.org/o")
+ self.g = serd.uri("http://example.org/g")
+ self.cursor = serd.Cursor("foo.ttl", 1, 0)
+
+ def testGet(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ statement = serd.Statement(s, p, o, g, self.cursor)
+
+ self.assertEqual(statement[serd.Field.SUBJECT], s)
+ self.assertEqual(statement[serd.Field.PREDICATE], p)
+ self.assertEqual(statement[serd.Field.OBJECT], o)
+ self.assertEqual(statement[serd.Field.GRAPH], g)
+
+ self.assertEqual(statement[0], s)
+ self.assertEqual(statement[1], p)
+ self.assertEqual(statement[2], o)
+ self.assertEqual(statement[3], g)
+
+ with self.assertRaises(IndexError):
+ statement[-1]
+
+ with self.assertRaises(IndexError):
+ statement[4]
+
+ def testAllFields(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ statement = serd.Statement(s, p, o, g, self.cursor)
+
+ self.assertEqual(statement.node(serd.Field.SUBJECT), s)
+ self.assertEqual(statement.node(serd.Field.PREDICATE), p)
+ self.assertEqual(statement.node(serd.Field.OBJECT), o)
+ self.assertEqual(statement.node(serd.Field.GRAPH), g)
+
+ self.assertEqual(statement.subject(), s)
+ self.assertEqual(statement.predicate(), p)
+ self.assertEqual(statement.object(), o)
+ self.assertEqual(statement.graph(), g)
+
+ self.assertEqual(statement.cursor(), self.cursor)
+
+ def testNoGraph(self):
+ s, p, o = self.s, self.p, self.o
+ statement = serd.Statement(s, p, o, None, self.cursor)
+
+ self.assertEqual(statement.node(serd.Field.SUBJECT), s)
+ self.assertEqual(statement.node(serd.Field.PREDICATE), p)
+ self.assertEqual(statement.node(serd.Field.OBJECT), o)
+ self.assertIsNone(statement.node(serd.Field.GRAPH))
+
+ self.assertEqual(statement.subject(), s)
+ self.assertEqual(statement.predicate(), p)
+ self.assertEqual(statement.object(), o)
+ self.assertIsNone(statement.graph())
+
+ self.assertEqual(statement.cursor(), self.cursor)
+
+ def testNoCursor(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ statement = serd.Statement(s, p, o, g)
+
+ self.assertEqual(statement.node(serd.Field.SUBJECT), s)
+ self.assertEqual(statement.node(serd.Field.PREDICATE), p)
+ self.assertEqual(statement.node(serd.Field.OBJECT), o)
+ self.assertEqual(statement.node(serd.Field.GRAPH), g)
+
+ self.assertEqual(statement.subject(), s)
+ self.assertEqual(statement.predicate(), p)
+ self.assertEqual(statement.object(), o)
+ self.assertEqual(statement.graph(), g)
+
+ self.assertIsNone(statement.cursor())
+
+ def testNoGraphOrCursor(self):
+ s, p, o = self.s, self.p, self.o
+ statement = serd.Statement(s, p, o)
+
+ self.assertEqual(statement.node(serd.Field.SUBJECT), s)
+ self.assertEqual(statement.node(serd.Field.PREDICATE), p)
+ self.assertEqual(statement.node(serd.Field.OBJECT), o)
+ self.assertIsNone(statement.node(serd.Field.GRAPH))
+
+ self.assertEqual(statement.subject(), s)
+ self.assertEqual(statement.predicate(), p)
+ self.assertEqual(statement.object(), o)
+ self.assertIsNone(statement.graph())
+
+ self.assertIsNone(statement.cursor())
+
+ def testComparison(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ statement1 = serd.Statement(s, p, o, g)
+ statement2 = serd.Statement(o, p, s, g)
+
+ self.assertEqual(statement1, statement1)
+ self.assertNotEqual(statement1, statement2)
+
+ def testMatches(self):
+ s, p, o, g = self.s, self.p, self.o, self.g
+ x = serd.uri("http://example.org/x")
+ statement = serd.Statement(s, p, o, g)
+
+ self.assertTrue(statement.matches(s, p, o, g))
+ self.assertTrue(statement.matches(None, p, o, g))
+ self.assertTrue(statement.matches(s, None, o, g))
+ self.assertTrue(statement.matches(s, p, None, g))
+ self.assertTrue(statement.matches(s, p, o, None))
+
+ self.assertFalse(statement.matches(x, p, o, g))
+ self.assertFalse(statement.matches(s, x, o, g))
+ self.assertFalse(statement.matches(s, p, x, g))
+ self.assertFalse(statement.matches(s, p, o, x))
+
+ def testIteration(self):
+ triple = serd.Statement(self.s, self.p, self.o)
+ quad = serd.Statement(self.s, self.p, self.o, self.g)
+
+ self.assertEqual([n for n in triple], [self.s, self.p, self.o])
+ self.assertEqual([n for n in quad], [self.s, self.p, self.o, self.g])
+
+ def testStr(self):
+ self.assertEqual(
+ str(serd.Statement(self.s, self.p, self.o)),
+ "<http://example.org/s> <http://example.org/p> <http://example.org/o>",
+ )
+
+ self.assertEqual(
+ str(serd.Statement(self.s, self.p, self.o, self.g)),
+ "<http://example.org/s> <http://example.org/p> <http://example.org/o> <http://example.org/g>",
+ )
+
+ def testRepr(self):
+ self.assertEqual(
+ repr(serd.Statement(self.s, self.p, self.o)),
+ 'serd.Statement(serd.uri("http://example.org/s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o"))',
+ )
+
+ self.assertEqual(
+ repr(serd.Statement(self.s, self.p, self.o, self.g)),
+ 'serd.Statement(serd.uri("http://example.org/s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o"), serd.uri("http://example.org/g"))',
+ )
+
+
+class RangeTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+ self.s = serd.uri("http://example.org/s")
+ self.p = serd.uri("http://example.org/p")
+ self.p1 = serd.uri("http://example.org/p1")
+ self.p2 = serd.uri("http://example.org/p2")
+ self.o1 = serd.uri("http://example.org/o1")
+ self.o2 = serd.uri("http://example.org/o2")
+ self.g = serd.uri("http://example.org/g")
+
+ def testFront(self):
+ model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ model.insert((self.s, self.p, self.o1))
+ self.assertEqual(
+ model.all().front(), serd.Statement(self.s, self.p, self.o1)
+ )
+
+ def testEmpty(self):
+ model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ self.assertTrue(model.all().empty())
+ self.assertFalse(model.all())
+
+ model.insert((self.s, self.p, self.o1))
+ self.assertFalse(model.all().empty())
+ self.assertTrue(model.all())
+
+ def testIteration(self):
+ model = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ model.insert((self.s, self.p, self.o1))
+ model.insert((self.s, self.p, self.o2))
+
+ i = iter(model.all())
+ self.assertEqual(next(i), serd.Statement(self.s, self.p, self.o1))
+ self.assertEqual(next(i), serd.Statement(self.s, self.p, self.o2))
+ with self.assertRaises(StopIteration):
+ next(i)
+
+ def testEmptyIteration(self):
+ model = serd.Model(self.world)
+ count = 0
+
+ for s in model:
+ count += 1
+
+ self.assertEqual(count, 0)
+
+ for s in model.all():
+ count += 1
+
+ self.assertEqual(count, 0)
+
+ def testInsertErase(self):
+ model1 = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+ model2 = serd.Model(self.world, serd.ModelFlags.INDEX_SPO)
+
+ model1.insert((self.s, self.p1, self.o1))
+ model1.insert((self.s, self.p1, self.o2))
+ model1.insert((self.s, self.p2, self.o1))
+ model1.insert((self.s, self.p2, self.o2))
+
+ model2.insert(model1.range((self.s, self.p1, None)))
+
+ self.assertEqual(
+ [s for s in model2],
+ [
+ serd.Statement(self.s, self.p1, self.o1),
+ serd.Statement(self.s, self.p1, self.o2),
+ ],
+ )
+
+ model1.erase(model1.range((self.s, self.p2, None)))
+ self.assertEqual(model1, model2)
+
+
+class CursorTests(unittest.TestCase):
+ def testStringConstruction(self):
+ cur = serd.Cursor("foo.ttl", 3, 4)
+ self.assertEqual(cur.name(), "foo.ttl")
+ self.assertEqual(cur.line(), 3)
+ self.assertEqual(cur.column(), 4)
+
+ def testNodeConstruction(self):
+ name = serd.string("foo.ttl")
+ cur = serd.Cursor(name, 5, 6)
+ self.assertEqual(cur.name(), name)
+ self.assertEqual(cur.line(), 5)
+ self.assertEqual(cur.column(), 6)
+
+ def testComparison(self):
+ self.assertEqual(
+ serd.Cursor("foo.ttl", 1, 2), serd.Cursor("foo.ttl", 1, 2)
+ )
+ self.assertNotEqual(
+ serd.Cursor("foo.ttl", 9, 2), serd.Cursor("foo.ttl", 1, 2)
+ )
+ self.assertNotEqual(
+ serd.Cursor("foo.ttl", 1, 9), serd.Cursor("foo.ttl", 1, 2)
+ )
+ self.assertNotEqual(
+ serd.Cursor("bar.ttl", 1, 2), serd.Cursor("foo.ttl", 1, 2)
+ )
+
+
+class EventTests(unittest.TestCase):
+ def testRepr(self):
+ base = serd.uri("http://example.org/base")
+ ns = serd.uri("http://example.org/ns")
+
+ self.assertEqual(
+ repr(serd.Event.base(base)),
+ 'serd.Event.base("http://example.org/base")',
+ )
+
+ self.assertEqual(
+ repr(serd.Event.prefix("eg", ns)),
+ 'serd.Event.prefix("eg", "http://example.org/ns")',
+ )
+
+ s = serd.blank("s")
+ p = serd.uri("http://example.org/p")
+ o = serd.uri("http://example.org/o")
+ g = serd.uri("http://example.org/g")
+ statement = serd.Statement(s, p, o, g)
+
+ self.assertEqual(
+ repr(serd.Event.statement(statement)),
+ 'serd.Event.statement(serd.Statement(serd.blank("s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o"), serd.uri("http://example.org/g")))',
+ )
+
+ self.assertEqual(
+ repr(
+ serd.Event.statement(
+ statement,
+ serd.StatementFlags.EMPTY_S | serd.StatementFlags.ANON_O,
+ )
+ ),
+ 'serd.Event.statement(serd.Statement(serd.blank("s"), serd.uri("http://example.org/p"), serd.uri("http://example.org/o"), serd.uri("http://example.org/g")), serd.StatementFlags.EMPTY_S | serd.StatementFlags.ANON_O)',
+ )
+
+ self.assertEqual(
+ repr(serd.Event.end(s)), 'serd.Event.end(serd.blank("s"))'
+ )
+
+
+class ReaderTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+ self.temp_dir = tempfile.mkdtemp()
+ self.ttl_path = os.path.join(self.temp_dir, "input.ttl")
+ self.s = serd.uri("http://example.org/s")
+ self.p1 = serd.uri("http://example.org/p1")
+ self.p2 = serd.uri("http://example.org/p2")
+ self.o1 = serd.uri("http://example.org/o1")
+ self.o2 = serd.uri("http://example.org/o2")
+
+ self.ttl_document = """@prefix eg: <http://example.org/> .
+@base <http://example.org/base> .
+eg:s eg:p1 eg:o1 ;
+eg:p2 eg:o2 .
+"""
+ self.events = [
+ serd.Event.prefix("eg", "http://example.org/"),
+ serd.Event.base("http://example.org/base"),
+ serd.Event.statement(serd.Statement(self.s, self.p1, self.o1)),
+ serd.Event.statement(serd.Statement(self.s, self.p2, self.o2)),
+ ]
+
+ with open(self.ttl_path, "w") as f:
+ f.write(self.ttl_document)
+
+ def tearDown(self):
+ shutil.rmtree(self.temp_dir)
+
+ def testReadFileToSink(self):
+ class TestSink(serd.Sink):
+ def __init__(self):
+ super().__init__()
+ self.events = []
+
+ def __call__(self, event):
+ self.events += [event]
+ return serd.Status.SUCCESS
+
+ s, p1, p2, o1, o2 = self.s, self.p1, self.p2, self.o1, self.o2
+
+ env = serd.Env()
+ source = serd.FileSource(self.ttl_path)
+ sink = TestSink()
+ reader = serd.Reader(
+ self.world, serd.Syntax.TURTLE, 0, env, sink, 4096
+ )
+
+ self.assertEqual(reader.start(source), serd.Status.SUCCESS)
+ self.assertEqual(sink.events, [])
+ self.assertEqual(reader.read_document(), serd.Status.SUCCESS)
+ self.assertEqual(reader.finish(), serd.Status.SUCCESS)
+ self.assertEqual(sink.events, self.events)
+
+ def testReadFileToFunction(self):
+ captured_events = []
+
+ def sink(event):
+ captured_events.append(event)
+
+ s, p1, p2, o1, o2 = self.s, self.p1, self.p2, self.o1, self.o2
+
+ env = serd.Env()
+ source = serd.FileSource(self.ttl_path)
+ reader = serd.Reader(
+ self.world, serd.Syntax.TURTLE, 0, env, sink, 4096
+ )
+
+ self.assertEqual(reader.start(source), serd.Status.SUCCESS)
+ self.assertEqual(captured_events, [])
+ self.assertEqual(reader.read_document(), serd.Status.SUCCESS)
+ self.assertEqual(reader.finish(), serd.Status.SUCCESS)
+ self.assertEqual(captured_events, self.events)
+
+ def testReadStringToFunction(self):
+ captured_events = []
+
+ def sink(event):
+ captured_events.append(event)
+
+ s, p1, p2, o1, o2 = self.s, self.p1, self.p2, self.o1, self.o2
+
+ env = serd.Env()
+ source = serd.StringSource(self.ttl_document)
+ reader = serd.Reader(
+ self.world, serd.Syntax.TURTLE, 0, env, sink, 4096
+ )
+
+ self.assertEqual(reader.start(source), serd.Status.SUCCESS)
+ self.assertEqual(captured_events, [])
+ self.assertEqual(reader.read_document(), serd.Status.SUCCESS)
+ self.assertEqual(reader.finish(), serd.Status.SUCCESS)
+ self.assertEqual(captured_events, self.events)
+
+
+class LoadTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+ self.temp_dir = tempfile.mkdtemp()
+ self.ttl_path = os.path.join(self.temp_dir, "input.ttl")
+ self.ttl_document = r"""@prefix eg: <http://example.org/> .
+@base <http://example.org/base> .
+eg:s eg:p1 eg:o1 ;
+ eg:p2 eg:o2 .
+"""
+
+ with open(self.ttl_path, "w") as f:
+ f.write(self.ttl_document)
+
+ def tearDown(self):
+ shutil.rmtree(self.temp_dir)
+
+ def testLoad(self):
+ s = serd.uri("http://example.org/s")
+ p1 = serd.uri("http://example.org/p1")
+ p2 = serd.uri("http://example.org/p2")
+ o1 = serd.uri("http://example.org/o1")
+ o2 = serd.uri("http://example.org/o2")
+
+ model = self.world.load(self.ttl_path)
+
+ self.assertEqual(
+ [statement for statement in model],
+ [
+ serd.Statement(s, p1, o1),
+ serd.Statement(s, p2, o2),
+ ],
+ )
+
+ def testLoadString(self):
+ s = serd.uri("http://example.org/s")
+ p1 = serd.uri("http://example.org/p1")
+ p2 = serd.uri("http://example.org/p2")
+ o1 = serd.uri("http://example.org/o1")
+ o2 = serd.uri("http://example.org/o2")
+
+ model = self.world.loads(self.ttl_document)
+
+ self.assertEqual(
+ [statement for statement in model],
+ [
+ serd.Statement(s, p1, o1),
+ serd.Statement(s, p2, o2),
+ ],
+ )
+
+
+class DumpTests(unittest.TestCase):
+ def setUp(self):
+ self.world = serd.World()
+ self.temp_dir = tempfile.mkdtemp()
+ self.ttl_path = os.path.join(self.temp_dir, "output.ttl")
+
+ self.ttl_document = r"""<http://example.org/s>
+ <http://example.org/p> <http://example.org/o1> ,
+ <http://example.org/o2> .
+"""
+
+ self.s = serd.uri("http://example.org/s")
+ self.p = serd.uri("http://example.org/p")
+ self.o = serd.uri("http://example.org/o")
+ self.o1 = serd.uri("http://example.org/o1")
+ self.o2 = serd.uri("http://example.org/o2")
+ self.g = serd.uri("http://example.org/g")
+ self.x = serd.uri("http://example.org/x")
+
+ def tearDown(self):
+ shutil.rmtree(self.temp_dir)
+
+ def testDumpFile(self):
+ s, p, o, o1, o2 = self.s, self.p, self.o, self.o1, self.o2
+ g, x = self.g, self.x
+
+ flags = serd.ModelFlags.INDEX_SPO
+ model = serd.Model(self.world, flags)
+
+ model.insert((s, p, o1))
+ model.insert((s, p, o2))
+
+ self.world.dump(model, self.ttl_path)
+
+ with open(self.ttl_path, "r") as output:
+ self.assertEqual(output.read(), self.ttl_document)
+
+ def testDumpString(self):
+ s, p, o, o1, o2 = self.s, self.p, self.o, self.o1, self.o2
+ g, x = self.g, self.x
+
+ flags = serd.ModelFlags.INDEX_SPO
+ model = serd.Model(self.world, flags)
+
+ model.insert((s, p, o1))
+ model.insert((s, p, o2))
+
+ self.assertEqual(self.world.dumps(model), self.ttl_document)
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 03:36:14 +0000