[Zodb-checkins] CVS: Zope3/src/zope/interface - adapter.py:1.3

[Jim Fulton]

Update of /cvs-repository/Zope3/src/zope/interface
In directory cvs.zope.org:/tmp/cvs-serv8310

Modified Files:
	adapter.py 
Log Message:
Added a simpler adapter cache.


=== Zope3/src/zope/interface/adapter.py 1.2 => 1.3 ===
--- Zope3/src/zope/interface/adapter.py:1.2	Wed Dec 25 09:13:42 2002
+++ Zope3/src/zope/interface/adapter.py	Mon Jan 20 15:02:52 2003
@@ -75,13 +75,34 @@
             raise TypeError(
                 "The provide argument must be an interface (or None)")
 
+        # Invalidate our cache
+        self._v_cache = {}
+
         self._registerAllProvided(require, provide, object, provide)
 
-    def get(self, (ob_interface, provide), default=None, filter=None):
+    def get(self, ob_interface_provide, default=None, filter=None):
         """
         Finds a registered component that provides the given interface.
         Returns None if not found.
         """
+
+        if filter is None:
+            cache = getattr(self, '_v_cache', self)
+            if cache is self:
+                cache = self._v_cache = {}
+            key = `ob_interface_provide`
+            cached = cache.get(key, self)
+            if cached is self:
+                cached = self._uncached_get(ob_interface_provide,
+                                            default, filter)
+                cache[key] = cached
+            return cached
+
+        return self._uncached_get(ob_interface_provide,
+                                  default, filter)
+
+    def _uncached_get(self, (ob_interface, provide), default, filter):
+        
         for interface in _flatten(ob_interface, 1):
             c = self._reg.get((interface, provide))
             if c: