author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Tue, 13 Sep 2011 15:41:11 +0200 | |
changeset 7784 | 7f5c455ec7d1 |
parent 7519 | 4e531c8697f8 |
child 7911 | 5ab88d05083f |
permissions | -rw-r--r-- |
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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# |
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# This file is part of CubicWeb. |
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# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""base xml and rss views""" |
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|
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__docformat__ = "restructuredtext en" |
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_ = unicode |
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|
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from yams import xy |
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|
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from cubicweb.schema import VIRTUAL_RTYPES |
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from cubicweb.view import EntityView |
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from cubicweb.web.views.xmlrss import SERIALIZERS |
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|
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try: |
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import rdflib |
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except ImportError: |
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rdflib = None |
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|
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if rdflib is not None: |
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RDF = rdflib.Namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#') |
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CW = rdflib.Namespace('http://ns.cubicweb.org/cubicweb/0.0/') |
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from rdflib import Literal, URIRef, Namespace |
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def urijoin(item): |
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base, ext = item |
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return URIRef(Namespace(base)[ext]) |
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SKIP_RTYPES = VIRTUAL_RTYPES | set(['cwuri', 'is', 'is_instance_of']) |
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class RDFView(EntityView): |
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"""rdf view for entities""" |
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__regid__ = 'rdf' |
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title = _('rdf') |
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templatable = False |
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content_type = 'text/xml' # +rdf |
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def call(self): |
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graph = rdflib.Graph() |
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graph.bind('cw', CW) |
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for prefix, xmlns in xy.XY.prefixes.items(): |
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graph.bind(prefix, rdflib.Namespace(xmlns)) |
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for i in xrange(self.cw_rset.rowcount): |
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entity = self.cw_rset.complete_entity(i, 0) |
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self.entity2graph(graph, entity) |
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self.w(graph.serialize().decode('utf-8')) |
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def entity_call(self, entity): |
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self.call() |
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def entity2graph(self, graph, entity): |
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cwuri = URIRef(entity.cwuri) |
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add = graph.add |
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add( (cwuri, RDF.type, CW[entity.e_schema.type]) ) |
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try: |
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for item in xy.xeq(entity.e_schema.type): |
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add( (cwuri, RDF.type, urijoin(item)) ) |
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except xy.UnsupportedVocabulary: |
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pass |
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for rschema, eschemas, role in entity.e_schema.relation_definitions('relation'): |
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rtype = rschema.type |
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if rtype in SKIP_RTYPES or rtype.endswith('_permission'): |
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continue |
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for eschema in eschemas: |
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if eschema.final: |
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try: |
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value = entity.cw_attr_cache[rtype] |
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except KeyError: |
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continue # assuming rtype is Bytes |
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if value is not None: |
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add( (cwuri, CW[rtype], Literal(value)) ) |
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try: |
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for item in xy.xeq('%s %s' % (entity.e_schema.type, rtype)): |
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add( (cwuri, urijoin(item[1]), Literal(value)) ) |
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except xy.UnsupportedVocabulary: |
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pass |
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else: |
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for related in entity.related(rtype, role, entities=True): |
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if role == 'subject': |
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add( (cwuri, CW[rtype], URIRef(related.cwuri)) ) |
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try: |
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for item in xy.xeq('%s %s' % (entity.e_schema.type, rtype)): |
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add( (cwuri, urijoin(item), URIRef(related.cwuri)) ) |
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except xy.UnsupportedVocabulary: |
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pass |
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else: |
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add( (URIRef(related.cwuri), CW[rtype], cwuri) ) |
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|
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