[Zope-Checkins] CVS: Zope3/lib/python/Zope/ComponentArchitecture - IToIRegistry.py:1.1.4.10

[Jim Fulton]

Update of /cvs-repository/Zope3/lib/python/Zope/ComponentArchitecture
In directory cvs.zope.org:/tmp/cvs-serv14827

Modified Files:
      Tag: Zope-3x-branch
	IToIRegistry.py 
Log Message:
Added the type registry, which lets us register data for object types.



=== Zope3/lib/python/Zope/ComponentArchitecture/IToIRegistry.py 1.1.4.9 => 1.1.4.10 ===
 
 class IRegistry(IToIRegistry):
+    """Registry for components that provide an interface but down require one
+
+    For example, this is used for registering utilities and resources.
+    """
 
     def register(self, provide, c):
         '''
@@ -100,6 +104,7 @@
         self._registerAll(None, provide, c, provide)
 
 class DataRegistry(IToIRegistry):
+    """XXX need doc for this"""
 
     def register(self, provide, c):
         '''
@@ -108,6 +113,11 @@
         self._registerAll(None, provide, c, provide)
 
 class IToIDataRegistry(IToIRegistry):
+    """Store data accociated with two interfaces
+
+    This is used for default view names, which are registered for
+    specific presentation types and object types.
+    """
 
     def register(self, require, provide, data):
         '''
@@ -115,3 +125,24 @@
         provide interface.
         '''
         self._registerAll(require, provide, data, provide)
+
+class TypeRegistry(IToIRegistry):
+    """Register data for objects of a given type.
+
+    Type is expressed by an interface.
+
+    For example, this allows us to register subscription lists by event types.
+    """
+
+    def register(self, require, data):
+        '''
+        Registers data for combination of a require and a
+        provide interface.
+        '''
+        self._registerAll(require, None, data, None)
+
+    def getForObject(self, ob):
+        for i in objectImplements(ob):
+            c=self.get(i, None)
+            if c is not None: return c
+        return self.get(None, None)