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-rw-r--r--raul/AtomRDF.hpp143
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diff --git a/raul/AtomRDF.hpp b/raul/AtomRDF.hpp
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-/* This file is part of Raul.
- * Copyright 2007-2011 David 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
- */
-
-#ifndef RAUL_ATOM_RDF_HPP
-#define RAUL_ATOM_RDF_HPP
-
-#include <cmath>
-#include <cstring>
-#include <string>
-#include <utility>
-
-#include "raul/Atom.hpp"
-#include "raul/log.hpp"
-
-#include "sord/sordmm.hpp"
-
-#define CUC(x) ((const unsigned char*)(x))
-
-namespace Raul {
-
-/** Conversion between Raul Atoms and Sord RDF nodes.
- * This code (in header raul/AtomRDF.hpp) depends on sord, only apps
- * which directly depend on both raul and sord should include it.
- */
-namespace AtomRDF {
-
-/** Convert a Sord::Node to a Raul::Atom */
-inline Atom
-node_to_atom(Forge& forge, Sord::Model& model, const Sord::Node& node)
-{
- if (node.is_bool()) {
- return forge.make(bool(node.to_bool()));
- } else if (node.is_uri()) {
- return forge.alloc(Atom::URI, node.to_c_string());
- } else if (node.is_float()) {
- return forge.make(node.to_float());
- } else if (node.is_int()) {
- return forge.make(node.to_int());
- } else if (node.is_blank()) {
- Atom::DictValue dict;
- Sord::Node nil;
- for (Sord::Iter i = model.find(node, nil, nil); !i.end(); ++i) {
- Sord::Node predicate = i.get_predicate();
- Sord::Node object = i.get_object();
- dict.insert(std::make_pair(node_to_atom(forge, model, predicate),
- node_to_atom(forge, model, object)));
- }
- return forge.alloc(dict);
- } else {
- return forge.alloc(node.to_c_string());
- }
-}
-
-#define RAUL_NS_XSD "http://www.w3.org/2001/XMLSchema#"
-
-/** Convert a Raul::Atom to a Sord::Node
- * Note that not all Atoms are serialisable, the returned node should
- * be checked (can be treated as a bool) before use. */
-inline Sord::Node
-atom_to_node(Sord::Model& model, const Atom& atom)
-{
- Sord::World& world = model.world();
-
- std::string str;
- SordNode* type = NULL;
- SordNode* node = NULL;
- SerdNode snode;
-
- switch (atom.type()) {
- case Atom::INT:
- snode = serd_node_new_integer(atom.get_int32());
- str = (const char*)snode.buf;
- serd_node_free(&snode);
- // xsd:integer -> pretty integer literals in Turtle
- type = sord_new_uri(world.world(), CUC(RAUL_NS_XSD "integer"));
- break;
- case Atom::FLOAT:
- if (std::isnan(atom.get_float()) || std::isinf(atom.get_float()))
- break;
- snode = serd_node_new_decimal(atom.get_float(), 8);
- str = (const char*)snode.buf;
- serd_node_free(&snode);
- // xsd:decimal -> pretty decimal (float) literals in Turtle
- type = sord_new_uri(world.world(), CUC(RAUL_NS_XSD "decimal"));
- break;
- case Atom::BOOL:
- // xsd:boolean -> pretty boolean literals in Turtle
- if (atom.get_bool())
- str = "true";
- else
- str = "false";
- type = sord_new_uri(world.world(), CUC(RAUL_NS_XSD "boolean"));
- break;
- case Atom::URI:
- str = atom.get_uri();
- node = sord_new_uri(world.world(), CUC(str.c_str()));
- break;
- case Atom::STRING:
- str = atom.get_string();
- break;
- case Atom::DICT: {
- Sord::Node blank = Sord::Node::blank_id(model.world());
- for (Atom::DictValue::const_iterator i = atom.get_dict().begin();
- i != atom.get_dict().end(); ++i) {
- model.add_statement(blank,
- atom_to_node(model, i->first),
- atom_to_node(model, i->second));
- }
- node = blank.c_obj();
- break;
- }
- case Atom::BLOB:
- case Atom::NIL:
- default:
- warn << "Unserializable Atom" << std::endl;
- break;
- }
-
- if (!node && str != "")
- node = sord_new_literal(world.world(), type, CUC(str.c_str()), NULL);
-
- return Sord::Node(world, node);
-}
-
-} // namespace AtomRDF
-} // namespace Raul
-
-#endif // RAUL_ATOM_RDF_HPP
-