Serializer -> Serialiser.

Ingen is a god-fearing proper Queen's english speaking upstanding gentleman of a project, cherrio, pip-pip, indeed, etc.


git-svn-id: http://svn.drobilla.net/lad/ingen@849 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 434 insertions, 0 deletions

diff --git a/src/libs/serialisation/Serialiser.cpp b/src/libs/serialisation/Serialiser.cpp
new file mode 100644
index 00000000..15b7f753
--- /dev/null
+++ b/src/libs/serialisation/Serialiser.cpp
@@ -0,0 +1,434 @@
+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstdlib> // atof
+#include <cstring>
+#include <fstream>
+#include <iostream>
+#include <locale.h>
+#include <stdexcept>
+#include <string>
+#include <utility> // pair, make_pair
+#include <vector>
+#include <raul/Atom.hpp>
+#include <raul/AtomRedland.hpp>
+#include <raul/Path.hpp>
+#include <raul/RDFModel.hpp>
+#include <raul/RDFNode.hpp>
+#include <raul/RDFWorld.hpp>
+#include <raul/TableImpl.hpp>
+#include "interface/EngineInterface.hpp"
+#include "interface/Plugin.hpp"
+#include "interface/Patch.hpp"
+#include "interface/Node.hpp"
+#include "interface/Port.hpp"
+#include "interface/Connection.hpp"
+#include "Serialiser.hpp"
+
+using namespace std;
+using namespace Raul;
+using namespace Raul::RDF;
+using namespace Ingen;
+using namespace Ingen::Shared;
+
+namespace Ingen {
+namespace Serialisation {
+
+
+Serialiser::Serialiser(Raul::RDF::World& world)
+	: _world(world)
+{
+}
+	
+void
+Serialiser::to_file(SharedPtr<GraphObject> object, const string& filename)
+{
+	_root_object = object;
+	start_to_filename(filename);
+	serialize(object);
+	finish();
+}
+
+
+string
+Serialiser::to_string(SharedPtr<GraphObject> object)
+{
+	_root_object = object;
+	start_to_string();
+	serialize(object);
+	return finish();
+}
+
+
+/** Begin a serialization to a file.
+ *
+ * This must be called before any serializing methods.
+ */
+void
+Serialiser::start_to_filename(const string& filename)
+{
+	setlocale(LC_NUMERIC, "C");
+
+	_base_uri = "file://" + filename;
+	_model = new RDF::Model(_world);
+	_mode = TO_FILE;
+}
+
+
+/** Begin a serialization to a string.
+ *
+ * This must be called before any serializing methods.
+ *
+ * The results of the serialization will be returned by the finish() method after
+ * the desired objects have been serialized.
+ */
+void
+Serialiser::start_to_string()
+{
+	setlocale(LC_NUMERIC, "C");
+
+	_base_uri = "";
+	_model = new RDF::Model(_world);
+	_mode = TO_STRING;
+}
+
+
+/** Finish a serialization.
+ *
+ * If this was a serialization to a string, the serialization output
+ * will be returned, otherwise the empty string is returned.
+ */
+string
+Serialiser::finish()
+{
+	string ret = "";
+
+	if (_mode == TO_FILE)
+		_model->serialize_to_file(_base_uri);
+	else
+		ret = _model->serialize_to_string();
+
+	_base_uri = "";
+	_node_map.clear();
+	
+	return ret;
+}
+
+
+/** Convert a path to an RDF blank node ID for serializing.
+ */
+RDF::Node
+Serialiser::path_to_node_id(const Path& path)
+{
+	assert(_model);
+	/*string ret = path.substr(1);
+
+	for (size_t i=0; i < ret.length(); ++i) {
+		if (ret[i] == '/')
+			ret[i] = '_';
+	}
+
+	return RDF::Node(Node::BLANK, ret);
+	*/
+
+	NodeMap::iterator i = _node_map.find(path);
+	if (i != _node_map.end()) {
+		assert(i->second);
+		assert(i->second.get_node());
+		return i->second;
+	} else {
+		RDF::Node id = _world.blank_id();
+		assert(id);
+		_node_map[path] = id;
+		return id;
+	}
+}
+
+
+#if 0
+/** Searches for the filename passed in the path, returning the full
+ * path of the file, or the empty string if not found.
+ *
+ * This function tries to be as friendly a black box as possible - if the path
+ * passed is an absolute path and the file is found there, it will return
+ * that path, etc.
+ *
+ * additional_path is a list (colon delimeted as usual) of additional
+ * directories to look in.  ie the directory the parent patch resides in would
+ * be a good idea to pass as additional_path, in the case of a subpatch.
+ */
+string
+Serialiser::find_file(const string& filename, const string& additional_path)
+{
+	string search_path = additional_path + ":" + _patch_search_path;
+	
+	// Try to open the raw filename first
+	std::ifstream is(filename.c_str(), std::ios::in);
+	if (is.good()) {
+		is.close();
+		return filename;
+	}
+	
+	string directory;
+	string full_patch_path = "";
+	
+	while (search_path != "") {
+		directory = search_path.substr(0, search_path.find(':'));
+		if (search_path.find(':') != string::npos)
+			search_path = search_path.substr(search_path.find(':')+1);
+		else
+			search_path = "";
+
+		full_patch_path = directory +"/"+ filename;
+		
+		std::ifstream is;
+		is.open(full_patch_path.c_str(), std::ios::in);
+	
+		if (is.good()) {
+			is.close();
+			return full_patch_path;
+		} else {
+			cerr << "[Serialiser] Could not find patch file " << full_patch_path << endl;
+		}
+	}
+
+	return "";
+}
+#endif
+
+void
+Serialiser::serialize(SharedPtr<GraphObject> object) throw (std::logic_error)
+{
+	if (!_model)
+		throw std::logic_error("serialize called without serialization in progress");
+
+	SharedPtr<Shared::Patch> patch = PtrCast<Shared::Patch>(object);
+	if (patch) {
+		serialize_patch(patch);
+		return;
+	}
+	
+	SharedPtr<Shared::Node> node = PtrCast<Shared::Node>(object);
+	if (node) {
+		serialize_node(node, path_to_node_id(node->path()));
+		return;
+	}
+	
+	SharedPtr<Shared::Port> port = PtrCast<Shared::Port>(object);
+	if (port) {
+		serialize_port(port.get(), path_to_node_id(port->path()));
+		return;
+	}
+
+	cerr << "[Serialiser] WARNING: Unsupported object type, "
+		<< object->path() << " not serialized." << endl;
+}
+
+
+RDF::Node
+Serialiser::patch_path_to_rdf_id(const Path& path)
+{
+	if (path == _root_object->path()) {
+		return RDF::Node(_model->world(), RDF::Node::RESOURCE, _base_uri);
+	} else {
+		assert(path.length() > _root_object->path().length());
+		return RDF::Node(_model->world(), RDF::Node::RESOURCE,
+				_base_uri + string("#") + path.substr(_root_object->path().length()));
+	}
+}
+
+
+void
+Serialiser::serialize_patch(SharedPtr<Shared::Patch> patch)
+{
+	assert(_model);
+
+	const RDF::Node patch_id = patch_path_to_rdf_id(patch->path());
+	
+	_model->add_statement(
+		patch_id,
+		"rdf:type",
+		RDF::Node(_model->world(), RDF::Node::RESOURCE, "http://drobilla.net/ns/ingen#Patch"));
+
+	if (patch->path().name().length() > 0) {
+		_model->add_statement(
+			patch_id, "ingen:name",
+			Atom(patch->path().name().c_str()));
+	}
+
+	_model->add_statement(
+		patch_id,
+		"ingen:polyphony",
+		Atom((int)patch->internal_polyphony()));
+	
+	_model->add_statement(
+		patch_id,
+		"ingen:enabled",
+		Atom(patch->enabled()));
+	
+	for (GraphObject::MetadataMap::const_iterator m = patch->metadata().begin();
+			m != patch->metadata().end(); ++m) {
+		if (m->first.find(":") != string::npos) {
+			_model->add_statement(
+				patch_id,
+				m->first.c_str(),
+				m->second);
+		}
+	}
+
+	for (GraphObject::const_iterator n = patch->children_begin(); n != patch->children_end(); ++n) {
+		SharedPtr<Shared::Patch> patch = PtrCast<Shared::Patch>(n->second);
+		SharedPtr<Shared::Node>  node  = PtrCast<Shared::Node>(n->second);
+		if (patch) {
+			_model->add_statement(patch_id, "ingen:node", patch_path_to_rdf_id(patch->path()));
+			serialize_patch(patch);
+		} else if (node) {
+			const RDF::Node node_id = path_to_node_id(n->second->path());
+			_model->add_statement(patch_id, "ingen:node", node_id);
+			serialize_node(node, node_id);
+		}
+	}
+	
+	for (uint32_t i=0; i < patch->num_ports(); ++i) {
+		Port* p = patch->port(i);
+		const RDF::Node port_id = path_to_node_id(p->path());
+		_model->add_statement(patch_id, "ingen:port", port_id);
+		serialize_port(p, port_id);
+	}
+
+	for (Shared::Patch::Connections::const_iterator c = patch->connections().begin();
+			c != patch->connections().end(); ++c) {
+		serialize_connection(*c);
+	}
+}
+
+
+void
+Serialiser::serialize_plugin(SharedPtr<Shared::Plugin> plugin)
+{
+	assert(_model);
+
+	const RDF::Node plugin_id = RDF::Node(_model->world(), RDF::Node::RESOURCE, plugin->uri());
+
+	_model->add_statement(
+		plugin_id,
+		"rdf:type",
+		RDF::Node(_model->world(), RDF::Node::RESOURCE, plugin->type_uri()));
+} 
+
+
+void
+Serialiser::serialize_node(SharedPtr<Shared::Node> node, const RDF::Node& node_id)
+{
+	const RDF::Node plugin_id
+		= RDF::Node(_model->world(), RDF::Node::RESOURCE, node->plugin()->uri());
+
+	_model->add_statement(
+		node_id,
+		"rdf:type",
+		RDF::Node(_model->world(), RDF::Node::RESOURCE, "ingen:Node"));
+	
+	_model->add_statement(
+		node_id,
+		"ingen:name",
+		node->path().name());
+	
+	_model->add_statement(
+		node_id,
+		"ingen:plugin",
+		plugin_id);
+	
+	_model->add_statement(
+		node_id,
+		"ingen:polyphonic",
+		node->polyphonic());
+
+	//serialize_plugin(node->plugin());
+	
+	for (uint32_t i=0; i < node->num_ports(); ++i) {
+		Port* p = node->port(i);
+		assert(p);
+		const RDF::Node port_id = path_to_node_id(p->path());
+		serialize_port(p, port_id);
+		_model->add_statement(node_id, "ingen:port", port_id);
+	}
+
+	for (GraphObject::MetadataMap::const_iterator m = node->metadata().begin();
+			m != node->metadata().end(); ++m) {
+		if (m->first.find(":") != string::npos) {
+			_model->add_statement(
+				node_id,
+				m->first,
+				m->second);
+		}
+	}
+}
+
+/** Writes a port subject with various information only if there are some
+ * predicate/object pairs to go with it (eg if the port has metadata, or a value, or..).
+ * Audio output ports with no metadata will not be written, for example.
+ */
+void
+Serialiser::serialize_port(const Port* port, const RDF::Node& port_id)
+{
+	if (port->is_input())
+		_model->add_statement(port_id, "rdf:type",
+				RDF::Node(_model->world(), RDF::Node::RESOURCE, "ingen:InputPort"));
+	else
+		_model->add_statement(port_id, "rdf:type",
+				RDF::Node(_model->world(), RDF::Node::RESOURCE, "ingen:OutputPort"));
+
+	_model->add_statement(port_id, "ingen:name", Atom(port->path().name().c_str()));
+	
+	_model->add_statement(port_id, "rdf:type",
+			RDF::Node(_model->world(), RDF::Node::RESOURCE, port->type().uri()));
+	
+	if (port->type() == DataType::CONTROL && port->is_input())
+		_model->add_statement(port_id, "ingen:value", port->value());
+
+	if (port->metadata().size() > 0) {
+		for (GraphObject::MetadataMap::const_iterator m = port->metadata().begin();
+				m != port->metadata().end(); ++m) {
+		if (m->first.find(":") != string::npos) {
+				_model->add_statement(
+						port_id,
+						m->first,
+						m->second);
+			}
+		}
+	}
+}
+
+
+void
+Serialiser::serialize_connection(SharedPtr<Connection> connection) throw (std::logic_error)
+{
+	if (!_model)
+		throw std::logic_error("serialize_connection called without serialization in progress");
+
+	const RDF::Node src_node = path_to_node_id(connection->src_port_path());
+	const RDF::Node dst_node = path_to_node_id(connection->dst_port_path());
+
+	_model->add_statement(dst_node, "ingen:connectedTo", src_node);
+}
+
+
+} // namespace Serialisation
+} // namespace Ingen