master trunk of gnowsys-studio

1 files changed, 120 insertions, 0 deletions

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 <http://www.gnu.org/licenses/>.
+
+
+# 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 <http://www.gnu.org/licenses/>.
+
+
+
+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()
+