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-rw-r--r--raul/AtomRedland.hpp108
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diff --git a/raul/AtomRedland.hpp b/raul/AtomRedland.hpp
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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
- */
-
-#ifndef RAUL_ATOM_REDLAND_HPP
-#define RAUL_ATOM_REDLAND_HPP
-
-#include <iostream>
-#include <sstream>
-#include <cstring>
-#include <librdf.h>
-#include <raul/Atom.hpp>
-#include <raul/RDFNode.hpp>
-
-#define CUC(x) ((const unsigned char*)(x))
-
-namespace Raul {
-
-
-/** Support for serializing an Atom to/from RDF (via librdf).
- *
- * (Here to prevent a unnecessary reddland dependency for Atom).
- *
- * \ingroup raul
- */
-class AtomRedland {
-public:
- /** Set this atom's value to the object (value) portion of an RDF triple.
- *
- * Caller is responsible for calling free(triple->object).
- */
- static librdf_node* atom_to_rdf_node(librdf_world* world,
- const Atom& atom)
- {
- std::ostringstream os;
-
- librdf_uri* type = NULL;
- librdf_node* node = NULL;
- std::string str;
-
- switch (atom.type()) {
- case Atom::INT:
- os << atom.get_int32();
- str = os.str();
- // xsd:integer -> pretty integer literals in Turtle
- type = librdf_new_uri(world, CUC("http://www.w3.org/2001/XMLSchema#integer"));
- break;
- case Atom::FLOAT:
- os.precision(20);
- os << atom.get_float();
- str = os.str();
- // xsd:decimal -> pretty decimal (float) literals in Turtle
- type = librdf_new_uri(world, CUC("http://www.w3.org/2001/XMLSchema#decimal"));
- break;
- case Atom::BOOL:
- // xsd:boolean -> pretty boolean literals in Turtle
- if (atom.get_bool())
- str = "true";
- else
- str = "false";
- type = librdf_new_uri(world, CUC("http://www.w3.org/2001/XMLSchema#boolean"));
- break;
- case Atom::STRING:
- str = atom.get_string();
- break;
- case Atom::BLOB:
- case Atom::NIL:
- default:
- std::cerr << "WARNING: Unserializable Atom!" << std::endl;
- }
-
- if (str != "")
- node = librdf_new_node_from_typed_literal(world, CUC(str.c_str()), NULL, type);
-
- return node;
- }
-
- static Atom rdf_node_to_atom(const RDF::Node& node) {
- if (node.type() == RDF::Node::RESOURCE)
- return Atom(node.to_string());
- else if (node.is_float())
- return Atom(node.to_float());
- else if (node.is_int())
- return Atom(node.to_int());
- else if (node.is_bool())
- return Atom(node.to_bool());
- else
- return Atom(node.to_string());
- }
-};
-
-
-} // namespace Raul
-
-#endif // RAUL_ATOM_REDLAND_HPP