From 7a4f561e851fdc7246d804c3abb6748b8a4199a6 Mon Sep 17 00:00:00 2001 From: gnowgi Date: Thu, 15 Mar 2012 16:19:20 +0530 Subject: master trunk of gnowsys-studio --- gstudio/rdf.py | 120 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 gstudio/rdf.py (limited to 'gstudio/rdf.py') diff --git a/gstudio/rdf.py b/gstudio/rdf.py new file mode 100644 index 0000000..771490b --- /dev/null +++ b/gstudio/rdf.py @@ -0,0 +1,120 @@ +# Copyright (c) 2011, 2012 Free Software Foundation + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. + +# This program 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 Affero General Public License for more details. + +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + + +# This project incorporates work covered by the following copyright and permission notice: + +# Copyright (c) 2009, Julien Fache +# All rights reserved. + +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: + +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# * Neither the name of the author nor the names of other +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. + +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED +# OF THE POSSIBILITY OF SUCH DAMAGE. + + +# Copyright (c) 2011, 2012 Free Software Foundation + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as +# published by the Free Software Foundation, either version 3 of the +# License, or (at your option) any later version. + +# This program 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 Affero General Public License for more details. + +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see . + + + +import rdflib +from rdflib.graph import ConjunctiveGraph as Graph +from rdflib import plugin +from rdflib.store import Store, NO_STORE, VALID_STORE +from rdflib.namespace import Namespace +from rdflib.term import Literal +from rdflib.term import URIRef +from tempfile import mkdtemp +from gstudio.models import * + +def rdf_description(name, notation='xml' ): + """ + Funtion takes title of node, and rdf notation. + """ + valid_formats = ["xml", "n3", "ntriples", "trix"] + default_graph_uri = "http://gstudio.gnowledge.org/rdfstore" + configString = "/var/tmp/rdfstore" + + # Get the Sleepycat plugin. + store = plugin.get('Sleepycat', Store)('rdfstore') + + # Open previously created store, or create it if it doesn't exist yet + graph = Graph(store="Sleepycat", + identifier = URIRef(default_graph_uri)) + path = mkdtemp() + rt = graph.open(path, create=False) + if rt == NO_STORE: + #There is no underlying Sleepycat infrastructure, create it + graph.open(path, create=True) + else: + assert rt == VALID_STORE, "The underlying store is corrupt" + + + # Now we'll add some triples to the graph & commit the changes + rdflib = Namespace('http://sbox.gnowledge.org/gstudio/') + graph.bind("gstudio", "http://gnowledge.org/") + exclusion_fields = ["id", "rght", "node_ptr_id", "image", "lft", "_state", "_altnames_cache", "_tags_cache", "nid_ptr_id", "_mptt_cached_fields"] + node=Objecttype.objects.get(title=name) + node_dict=node.__dict__ + + subject=str(node_dict['id']) + for key in node_dict: + if key not in exclusion_fields: + predicate=str(key) + pobject=str(node_dict[predicate]) + graph.add((rdflib[subject], rdflib[predicate], Literal(pobject))) + + + graph.commit() + + print graph.serialize(format=notation) + + graph.close() + -- cgit v1.1