more on constraints: provide editable StaticConstraint

git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@2264 fd906abe-77d9-0310-91a1-e0d9ade77398

common.py

@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2008 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -88,6 +88,9 @@ class AdapterBase(object):
             return False
         return self.context == other.context
 
+    def getLoopsRoot(self):
+        return self.context.getLoopsRoot()
+
 
 class ResourceAdapterBase(AdapterBase):
 

concept.py

@@ -29,7 +29,7 @@ from zope.cachedescriptors.property import Lazy
 from zope.component import adapts
 from zope.interface import implements
 from zope.interface import alsoProvides, directlyProvides, directlyProvidedBy
-from zope.security.proxy import removeSecurityProxy
+from zope.security.proxy import removeSecurityProxy, isinstance
 from zope.traversing.api import getName, getParent
 from persistent import Persistent
 
@@ -41,6 +41,7 @@ from cybertools.typology.interfaces import IType, ITypeManager
 from cybertools.util.jeep import Jeep
 
 from loops.base import ParentInfo
+from loops.common import AdapterBase
 from loops.interfaces import IConcept, IConceptRelation, IConceptView
 from loops.interfaces import IConceptManager, IConceptManagerContained
 from loops.interfaces import ILoopsContained
@@ -286,6 +287,9 @@ class ConceptTypeSourceList(object):
 
     def __init__(self, context):
         self.context = context
+        if isinstance(context, AdapterBase):
+            self.context = self.context.context
+
 
     def __iter__(self):
         return iter(self.conceptTypes)
@@ -326,7 +330,7 @@ class PredicateSourceList(object):
         return result
 
     def __len__(self):
-        return len(self.conceptTypes)
+        return len(self.predicates)
 
 
 class IndexAttributes(object):

configure.zcml

@@ -467,41 +467,28 @@
       component="loops.resource.ResourceTypeSourceList"
       name="loops.resourceTypeSource" />
 
+  <utility
+      provides="zope.schema.interfaces.IVocabularyFactory"
+      component="loops.concept.PredicateSourceList"
+      name="loops.predicateSource" />
+
   <utility
       provides="zope.schema.interfaces.IVocabularyFactory"
       component="loops.type.TypeInterfaceSourceList"
       name="loops.TypeInterfaceSource" />
 
-  <!--<vocabulary
-      factory="loops.concept.ConceptTypeSourceList"
-      name="loops.conceptTypeSource"
-      />
-
-  <vocabulary
-      factory="loops.resource.ResourceTypeSourceList"
-      name="loops.resourceTypeSource"
-      />-->
-
-  <!--<vocabulary
-      factory="loops.type.TypeInterfaceSourceList"
-      name="loops.TypeInterfaceSource"
-      />-->
-
-  <utility component="loops.concept.PredicateSourceList"
-           provides="zope.schema.interfaces.IVocabularyFactory"
-           name="loops.PredicateSource" />
-
 
   <include package=".browser" />
   <include package=".classifier" />
+  <include package=".constraint" />
   <include package=".i18n" />
   <include package=".integrator" />
   <include package=".knowledge" />
   <include package=".organize" />
   <include package=".process" />
+  <include package=".rest" />
   <include package=".search" />
   <include package=".versioning" />
   <include package=".xmlrpc" />
-  <include package=".rest" />
 
 </configure>

constraint/README.txt

@@ -4,3 +4,22 @@ loops - Linked Objects for Organization and Processing Services
 
   ($Id$)
 
+  >>> from zope import component
+  >>> from zope.traversing.api import getName
+
+Let's set up a loops site with basic and example concepts and resources.
+
+  >>> from zope.app.testing.setup import placefulSetUp, placefulTearDown
+  >>> site = placefulSetUp(True)
+
+  >>> from loops.tests.setup import TestSite
+  >>> t = TestSite(site)
+  >>> concepts, resources, views = t.setup()
+
+
+Constraints - Restrict Predicates and Types for Concept and Resource Assignments
+================================================================================
+
+  >>> from loops.constraint.base import StaticConstraint
+  >>> component.provideAdapter(StaticConstraint)
+

constraint/base.py

@@ -23,3 +23,33 @@ for assignment as children or as concepts to resources.
 $Id$
 """
 
+from zope.cachedescriptors.property import Lazy
+from zope.interface import implements
+from zope.traversing.api import getName
+
+from loops.common import AdapterBase
+from loops.constraint.interfaces import IStaticConstraint
+from loops.type import TypeInterfaceSourceList
+
+
+TypeInterfaceSourceList.typeInterfaces += (IStaticConstraint,)
+
+
+class StaticConstraint(AdapterBase):
+
+    _contextAttributes = AdapterBase._contextAttributes + ['relationType', 'cardinality']
+    _adapterAttributes = AdapterBase._adapterAttributes + ('predicates', 'types',)
+
+    implements(IStaticConstraint)
+
+    def getPredicates(self):
+        return getattr(self.context, '_predicates', [])
+    def setPredicates(self, value):
+        self.context._predicates = value
+    predicates = property(getPredicates, setPredicates)
+
+    def getTypes(self):
+        return getattr(self.context, '_types', [])
+    def setTypes(self, value):
+        self.context._types = value
+    types = property(getTypes, setTypes)

constraint/configure.zcml

@@ -0,0 +1,18 @@
+<!-- $Id$ -->
+
+<configure
+   xmlns:zope="http://namespaces.zope.org/zope"
+   xmlns:browser="http://namespaces.zope.org/browser"
+   i18n_domain="zope">
+
+  <zope:adapter
+        factory="loops.constraint.base.StaticConstraint"
+        trusted="True" />
+  <zope:class class="loops.constraint.base.StaticConstraint">
+    <require permission="zope.View"
+        interface="loops.constraint.interfaces.IStaticConstraint" />
+    <require permission="zope.ManageContent"
+        set_schema="loops.constraint.interfaces.IStaticConstraint" />
+  </zope:class>
+
+</configure>

constraint/interfaces.py

@@ -29,6 +29,8 @@ $Id$
 from zope.interface import Interface, Attribute
 from zope import interface, component, schema
 
+from loops.concept import Concept
+from loops.interfaces import IConceptSchema
 from loops.util import _
 
 
@@ -38,10 +40,10 @@ class IConstraint(Interface):
         client object.
 
         When the client object is a concept the constraint checks
-        for child relations, if it is a resource it checks for concept
-        relations. In order to check for allowed parent relations (on
-        a concept only) you may specify ``relationType=parent``
-        on the method calls.
+        parent relations, if it is a resource it checks concept
+        relations. In order to check for allowed child relations
+        on a concept only you may specify a relation type of ``child``
+        as an additional argument for the method calls.
     """
 
     client = Attribute('Object that will be checked for allowed relations.')
@@ -68,7 +70,7 @@ class IConstraint(Interface):
         """
 
 
-class IStaticConstraint(IConstraint):
+class IStaticConstraint(IConceptSchema, IConstraint):
     """ Provides a statically assigned contstraint setting.
 
         Typically used as a concept adapter for a persistent constraint
@@ -76,11 +78,40 @@ class IStaticConstraint(IConstraint):
         of allowed relationships.
     """
 
-    relationType = schema.TextLine()
+    relationType = schema.Choice(
+            title=_(u'Relation type'),
+            description=_(u'Select the type of the relation for '
+                    'which this constraint should be checked, '
+                    '"default" meaning parent relations for concepts '
+                    'and resource/concept relations for resources.'),
+            values=('default', 'child'),
+            default='default',
+            required=True,)
 
-    predicates = schema.List()
+    predicates = schema.List(
+            title=_(u'Predicates'),
+            description=_(u'Select the predicates that this '
+                    'constraint should allow.'),
+            value_type=schema.Choice(
+                        title=_(u'Predicate'),
+                        source='loops.predicateSource'),
+            required=False,)
 
-    types = schema.List()
+    types = schema.List(
+            title=_(u'Target types'),
+            description=_(u'Select the types of the objects '
+                    'that this constraints should allow.'),
+            value_type=schema.Choice(
+                        title=_(u'Type'),
+                        source='loops.conceptTypeSource'),
+            required=False,)
 
-    cardinality = schema.List()
+    cardinality = schema.Choice(
+            title=_(u'Cardinality'),
+            description=_(u'Select an entry that represents the '
+                    'allowed number of assigned items as specified '
+                    'by this constraint.'),
+            values=('0,*', '0,1', '1,*', '1,1'),
+            default='0,*',
+            required=True,)
 

knowledge/interfaces.py

@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -24,7 +24,6 @@ $Id$
 
 from zope.interface import Interface, Attribute
 from zope import interface, component, schema
-from zope.app import zapi
 from zope.i18nmessageid import MessageFactory
 from zope.security.proxy import removeSecurityProxy
 

organize/interfaces.py

@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2006 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by