web/views/owl.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Wed, 09 May 2012 17:15:44 +0200
changeset 8394 b8b23af60019
parent 8190 2a3c1b787688
child 10609 e2d8e81bfe68
permissions -rw-r--r--
[server/hook] a tiny bit of doc about before_server_shutdown
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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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"""produces some Ontology Web Language schema and views
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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from logilab.mtconverter import TransformError, xml_escape
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from cubicweb.view import StartupView, EntityView
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from cubicweb.predicates import none_rset, match_view
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from cubicweb.web.action import Action
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from cubicweb.web.views import schema
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OWL_CARD_MAP = {'1': '<rdf:type rdf:resource="&owl;FunctionalProperty"/>',
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                '?': '<owl:maxCardinality rdf:datatype="&xsd;int">1</owl:maxCardinality>',
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                '+': '<owl:minCardinality rdf:datatype="&xsd;int">1</owl:minCardinality>',
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                '*': ''
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                }
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OWL_TYPE_MAP = {'String': 'xsd:string',
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                'Bytes': 'xsd:byte',
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                'Password': 'xsd:byte',
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                'Boolean': 'xsd:boolean',
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                'Int': 'xsd:int',
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                'BigInt': 'xsd:int',
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                'Float': 'xsd:float',
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                'Decimal' : 'xsd:decimal',
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                'Date':'xsd:date',
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                'Datetime': 'xsd:dateTime',
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                'TZDatetime': 'xsd:dateTime',
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                'Time': 'xsd:time',
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                'TZTime': 'xsd:time',
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                'Interval': 'xsd:duration'
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                }
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OWL_OPENING_ROOT = u'''<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE rdf:RDF [
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        <!ENTITY owl "http://www.w3.org/2002/07/owl#" >
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        <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#" >
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]>
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<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
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    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
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    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
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    xmlns:owl="http://www.w3.org/2002/07/owl#"
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    xmlns="http://logilab.org/owl/ontologies/%(appid)s#"
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    xmlns:%(appid)s="http://logilab.org/owl/ontologies/%(appid)s#"
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    xmlns:base="http://logilab.org/owl/ontologies/%(appid)s">
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  <owl:Ontology rdf:about="">
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    <rdfs:comment>
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    %(appid)s Cubicweb OWL Ontology
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    </rdfs:comment>
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  </owl:Ontology>'''
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OWL_CLOSING_ROOT = u'</rdf:RDF>'
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class OWLView(StartupView):
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    """This view export in owl format schema database. It is the TBOX"""
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    __regid__ = 'owl'
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    title = _('owl')
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    templatable = False
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    content_type = 'application/xml' # 'text/xml'
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    def call(self, writeprefix=True):
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        skipmeta = int(self._cw.form.get('skipmeta', True))
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        if writeprefix:
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            self.w(OWL_OPENING_ROOT % {'appid': self._cw.vreg.schema.name})
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        self.visit_schema(skiptypes=skipmeta and schema.SKIP_TYPES or ())
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        if writeprefix:
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            self.w(OWL_CLOSING_ROOT)
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    def should_display_rschema(self, eschema, rschema, role):
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        return not rschema in self.skiptypes and (
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            rschema.may_have_permission('read', self._cw, eschema, role))
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    def visit_schema(self, skiptypes):
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    97
        """get a layout for a whole schema"""
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    98
        self.skiptypes = skiptypes
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    99
        entities = sorted(eschema for eschema in self._cw.vreg.schema.entities()
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   100
                          if not eschema.final or eschema in skiptypes)
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   101
        self.w(u'<!-- classes definition -->')
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   102
        for eschema in entities:
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   103
            self.visit_entityschema(eschema)
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   104
            self.w(u'<!-- property definition -->')
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   105
            self.visit_property_schema(eschema)
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diff changeset
   106
            self.w(u'<!-- datatype property -->')
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   107
            self.visit_property_object_schema(eschema)
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   108
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diff changeset
   109
    def visit_entityschema(self, eschema):
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   110
        """get a layout for an entity OWL schema"""
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   111
        self.w(u'<owl:Class rdf:ID="%s">'% eschema)
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   112
        self.w(u'<!-- relations -->')
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   113
        for rschema, targetschemas, role in eschema.relation_definitions():
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   114
            if not self.should_display_rschema(eschema, rschema, role):
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   115
                continue
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   116
            for oeschema in targetschemas:
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   117
                card = rschema.role_rdef(eschema, oeschema, role).role_cardinality(role)
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   118
                cardtag = OWL_CARD_MAP[card]
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   119
                if cardtag:
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   120
                    self.w(u'''<rdfs:subClassOf>
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   121
 <owl:Restriction>
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   122
  <owl:onProperty rdf:resource="#%s"/>
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   123
  %s
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   124
 </owl:Restriction>
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   125
</rdfs:subClassOf>''' % (rschema, cardtag))
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   126
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   127
        self.w(u'<!-- attributes -->')
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   128
        for rschema, aschema in eschema.attribute_definitions():
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   129
            if not self.should_display_rschema(eschema, rschema, 'subject'):
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   130
                continue
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   131
            self.w(u'''<rdfs:subClassOf>
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   132
  <owl:Restriction>
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   133
   <owl:onProperty rdf:resource="#%s"/>
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   134
   <rdf:type rdf:resource="&owl;FunctionalProperty"/>
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   135
  </owl:Restriction>
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   136
</rdfs:subClassOf>''' % rschema)
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   137
        self.w(u'</owl:Class>')
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diff changeset
   138
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diff changeset
   139
    def visit_property_schema(self, eschema):
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   140
        """get a layout for property entity OWL schema"""
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   141
        for rschema, targetschemas, role in eschema.relation_definitions():
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   142
            if not self.should_display_rschema(eschema, rschema, role):
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   143
                continue
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   144
            for oeschema in targetschemas:
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   145
                self.w(u'''<owl:ObjectProperty rdf:ID="%s">
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diff changeset
   146
 <rdfs:domain rdf:resource="#%s"/>
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   147
 <rdfs:range rdf:resource="#%s"/>
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diff changeset
   148
</owl:ObjectProperty>''' % (rschema, eschema, oeschema.type))
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   149
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diff changeset
   150
    def visit_property_object_schema(self, eschema):
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   151
        for rschema, aschema in eschema.attribute_definitions():
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   152
            if not self.should_display_rschema(eschema, rschema, 'subject'):
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   153
                continue
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   154
            self.w(u'''<owl:DatatypeProperty rdf:ID="%s">
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   155
  <rdfs:domain rdf:resource="#%s"/>
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   156
  <rdfs:range rdf:resource="%s"/>
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diff changeset
   157
</owl:DatatypeProperty>''' % (rschema, eschema, OWL_TYPE_MAP[aschema.type]))
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diff changeset
   158
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   159
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   160
class OWLABOXView(EntityView):
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   161
    '''This view represents a part of the ABOX for a given entity.'''
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   162
    __regid__ = 'owlabox'
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   163
    title = _('owlabox')
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   164
    templatable = False
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   165
    content_type = 'application/xml' # 'text/xml'
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   166
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diff changeset
   167
    def call(self):
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diff changeset
   168
        self.w(OWL_OPENING_ROOT % {'appid': self._cw.vreg.schema.name})
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   169
        for i in xrange(self.cw_rset.rowcount):
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   170
            self.cell_call(i, 0)
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   171
        self.w(OWL_CLOSING_ROOT)
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diff changeset
   172
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   173
    def cell_call(self, row, col):
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   174
        self.wview('owlaboxitem', self.cw_rset, row=row, col=col)
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diff changeset
   175
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   176
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   177
class OWLABOXItemView(EntityView):
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   178
    '''This view represents a part of the ABOX for a given entity.'''
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   179
    __regid__ = 'owlaboxitem'
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   180
    templatable = False
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   181
    content_type = 'application/xml' # 'text/xml'
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   182
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   183
    def cell_call(self, row, col):
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   184
        entity = self.cw_rset.complete_entity(row, col)
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   185
        eschema = entity.e_schema
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   186
        self.w(u'<%s rdf:ID="%s">' % (eschema, entity.eid))
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   187
        self.w(u'<!--attributes-->')
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   188
        for rschema, aschema in eschema.attribute_definitions():
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diff changeset
   189
            if rschema.meta:
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                continue
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            rdef = rschema.rdef(eschema, aschema)
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            if not rdef.may_have_permission('read', self._cw):
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                continue
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            aname = rschema.type
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            if aname == 'eid':
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                continue
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            try:
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                attr = entity.printable_value(aname, format='text/plain')
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                if attr:
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                    self.w(u'<%s>%s</%s>' % (aname, xml_escape(attr), aname))
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            except TransformError:
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                pass
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        self.w(u'<!--relations -->')
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        for rschema, targetschemas, role in eschema.relation_definitions():
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            if rschema.meta:
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                continue
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            for tschema in targetschemas:
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                rdef = rschema.role_rdef(eschema, tschema, role)
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                if rdef.may_have_permission('read', self._cw):
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                    break
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            else:
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                # no read perms to any relation of this type. Skip.
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                continue
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            if role == 'object':
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                attr = 'reverse_%s' % rschema.type
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            else:
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                attr = rschema.type
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            for x in getattr(entity, attr):
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                self.w(u'<%s>%s %s</%s>' % (attr, x.__regid__, x.eid, attr))
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        self.w(u'</%s>'% eschema)
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   221
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   222
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   223
class DownloadOWLSchemaAction(Action):
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    __regid__ = 'download_as_owl'
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    __select__ = none_rset() & match_view('schema')
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   226
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    category = 'mainactions'
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    title = _('download schema as owl')
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   229
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    def url(self):
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   231
        return self._cw.build_url('view', vid='owl')