[Zope3-checkins] SVN: Zope3/trunk/src/zope/schema/interfaces.py - add IIterableChoice and note the desire to depricate vocabularies

[Benji York]

Log message for revision 38249:
  - add IIterableChoice and note the desire to depricate vocabularies
  

Changed:
  U   Zope3/trunk/src/zope/schema/interfaces.py

-=-
Modified: Zope3/trunk/src/zope/schema/interfaces.py
===================================================================
--- Zope3/trunk/src/zope/schema/interfaces.py	2005-09-02 20:13:02 UTC (rev 38248)
+++ Zope3/trunk/src/zope/schema/interfaces.py	2005-09-02 20:14:33 UTC (rev 38249)
@@ -17,8 +17,8 @@
 """
 
 from zope.interface import Interface, Attribute
+from zope.schema._bootstrapfields import Container, Iterable
 from zope.schema._bootstrapfields import Field, Text, TextLine, Bool, Int
-from zope.schema._bootstrapfields import Container, Iterable
 
 from zope.i18nmessageid import MessageIDFactory
 _ = MessageIDFactory("zope")
@@ -523,6 +523,21 @@
         If 'value' is not a valid term, this method raises LookupError.
         """
 
+
+class IIterableSource(Interface):
+    """Source which supports iteration over allowed values.
+
+    The objects iteration provides must be values from the source.
+    """
+
+    def __iter__():
+        """Return an iterator which provides the values from the source."""
+
+    def __len__():
+        """Return the number of valid values, or sys.maxint."""
+
+
+# BBB vocabularies are pending deprecation, hopefully in 3.2
 class IIterableVocabulary(Interface):
     """Vocabulary which supports iteration over allowed values.