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-rw-r--r--src/RDFModel.cpp262
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diff --git a/src/RDFModel.cpp b/src/RDFModel.cpp
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--- a/src/RDFModel.cpp
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-/* This file is part of Raul.
- * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
- *
- * Raul is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any later
- * version.
- *
- * Raul is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <sstream>
-#include <raul/RDFWorld.hpp>
-#include <raul/RDFModel.hpp>
-#include <raul/RDFNode.hpp>
-#include <raul/AtomRedland.hpp>
-
-#define U(x) ((const unsigned char*)(x))
-
-using namespace std;
-
-namespace Raul {
-namespace RDF {
-
-
-//static const char* const RDF_LANG = "rdfxml-abbrev";
-static const char* const RDF_LANG = "turtle";
-
-
-/** Create an empty in-memory RDF model.
- */
-Model::Model(RDF::World& world)
- : _world(world)
- , _serialiser(NULL)
-{
- Glib::Mutex::Lock lock(world.mutex());
- _storage = librdf_new_storage(_world.world(), "hashes", NULL, "hash-type='memory'");
- _model = librdf_new_model(_world.world(), _storage, NULL);
-}
-
-
-/** Load a model from a URI (local file or remote).
- */
-Model::Model(World& world, const Glib::ustring& data_uri, Glib::ustring base_uri)
- : _world(world)
- , _serialiser(NULL)
-{
- Glib::Mutex::Lock lock(world.mutex());
- _storage = librdf_new_storage(_world.world(), "hashes", NULL, "hash-type='memory'");
- _model = librdf_new_model(_world.world(), _storage, NULL);
-
- set_base_uri(base_uri);
-
- librdf_uri* uri = librdf_new_uri(world.world(), (const unsigned char*)data_uri.c_str());
-
- if (uri) {
- librdf_parser* parser = librdf_new_parser(world.world(), "guess", NULL, NULL);
- librdf_parser_parse_into_model(parser, uri, _base.get_uri(), _model);
- librdf_free_parser(parser);
- } else {
- cerr << "Unable to create URI " << data_uri << endl;
- }
-
- if (uri)
- librdf_free_uri(uri);
-
- /*cout << endl << "Loaded model from " << data_uri << ":" << endl;
- serialize_to_file_handle(stdout);
- cout << endl << endl;*/
-}
-
-
-Model::~Model()
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- if (_serialiser)
- librdf_free_serializer(_serialiser);
-
- librdf_free_model(_model);
- librdf_free_storage(_storage);
-}
-
-
-void
-Model::set_base_uri(const Glib::ustring& uri)
-{
- if (uri == "")
- return;
-
- _base = Node(_world, Node::RESOURCE, uri);
-}
-
-
-void
-Model::setup_prefixes()
-{
- assert(_serialiser);
-
- for (Namespaces::const_iterator i = _world.prefixes().begin(); i != _world.prefixes().end(); ++i) {
- librdf_serializer_set_namespace(_serialiser,
- librdf_new_uri(_world.world(), U(i->second.c_str())), i->first.c_str());
- }
-}
-
-
-/** Begin a serialization to a C file handle.
- *
- * This must be called before any write methods.
- */
-void
-Model::serialise_to_file_handle(FILE* fd)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- _serialiser = librdf_new_serializer(_world.world(), RDF_LANG, NULL, NULL);
- setup_prefixes();
- librdf_serializer_serialize_model_to_file_handle(_serialiser, fd, NULL, _model);
- librdf_free_serializer(_serialiser);
- _serialiser = NULL;
-}
-
-
-/** Begin a serialization to a file.
- *
- * \a uri must be a local (file://) URI.
- *
- * This must be called before any write methods.
- */
-void
-Model::serialise_to_file(const Glib::ustring& uri_str)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- librdf_uri* uri = librdf_new_uri(_world.world(), (const unsigned char*)uri_str.c_str());
- if (uri && librdf_uri_is_file_uri(uri)) {
- _serialiser = librdf_new_serializer(_world.world(), RDF_LANG, NULL, NULL);
- setup_prefixes();
- librdf_serializer_serialize_model_to_file(_serialiser, librdf_uri_to_filename(uri), uri, _model);
- librdf_free_serializer(_serialiser);
- _serialiser = NULL;
- }
- librdf_free_uri(uri);
-}
-
-
-/** Begin a serialization to a string.
- *
- * This must be called before any write methods.
- *
- * The results of the serialization will be returned by the finish() method after
- * the desired objects have been serialized.
- */
-string
-Model::serialise_to_string()
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- _serialiser = librdf_new_serializer(_world.world(), RDF_LANG, NULL, NULL);
- setup_prefixes();
-
- unsigned char* c_str
- = librdf_serializer_serialize_model_to_string(_serialiser, NULL, _model);
-
- string result((const char*)c_str);
- free(c_str);
-
- librdf_free_serializer(_serialiser);
- _serialiser = NULL;
-
- return result;
-}
-
-
-void
-Model::add_statement(const Node& subject,
- const Node& predicate,
- const Node& object)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- assert(subject.get_node());
- assert(predicate.get_node());
- assert(object.get_node());
-
- librdf_statement* triple = librdf_new_statement_from_nodes(_world.world(),
- subject.get_node(), predicate.get_node(), object.get_node());
-
- librdf_model_add_statement(_model, triple);
-}
-
-
-void
-Model::add_statement(const Node& subject,
- const string& predicate_id,
- const Node& object)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- const string predicate_uri = _world.expand_uri(predicate_id);
- librdf_node* predicate = librdf_new_node_from_uri_string(_world.world(),
- (const unsigned char*)predicate_uri.c_str());
-
- librdf_statement* triple = librdf_new_statement_from_nodes(_world.world(),
- subject.get_node(), predicate, object.get_node());
-
- librdf_model_add_statement(_model, triple);
-}
-
-
-void
-Model::add_statement(const Node& subject,
- const Node& predicate,
- const Atom& object)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- librdf_node* atom_node = AtomRedland::atom_to_rdf_node(_world.world(), object);
-
- if (atom_node) {
- librdf_statement* triple = librdf_new_statement_from_nodes(_world.world(),
- subject.get_node(), predicate.get_node(), atom_node);
- librdf_model_add_statement(_model, triple);
- } else {
- cerr << "WARNING: Unable to add statement (unserializable Atom)" << endl;
- }
-}
-
-
-void
-Model::add_statement(const Node& subject,
- const string& predicate_id,
- const Atom& object)
-{
- Glib::Mutex::Lock lock(_world.mutex());
-
- const string predicate_uri = _world.expand_uri(predicate_id);
- librdf_node* predicate = librdf_new_node_from_uri_string(_world.world(),
- (const unsigned char*)predicate_uri.c_str());
-
- librdf_node* atom_node = AtomRedland::atom_to_rdf_node(_world.world(), object);
-
- if (atom_node) {
- librdf_statement* triple = librdf_new_statement_from_nodes(_world.world(),
- subject.get_node(), predicate, atom_node);
- librdf_model_add_statement(_model, triple);
- } else {
- cerr << "WARNING: Unable to add statement (unserializable Atom)" << endl;
- }
-}
-
-
-
-} // namespace RDF
-} // namespace Raul
-