UnIndex.py now accepts any mapping type for

the extra argument. Its parameter 'indexed_attrs'
can be string with comma delimited attribute names
or list/tuple

This fixes: # 1688

lib/python/Products/PluginIndexes/common/UnIndex.py

@@ -16,7 +16,7 @@ $Id$"""
 import sys
 from cgi import escape
 from logging import getLogger
-from types import IntType
+from types import IntType, StringTypes
 
 from BTrees.OOBTree import OOBTree, OOSet
 from BTrees.IOBTree import IOBTree
@@ -65,8 +65,10 @@ class UnIndex(SimpleItem):
           You will also need to pass in an object in the index and
           uninded methods for this to work.
 
-          'extra' -- a record-style object that keeps additional 
-          index-related parameters
+          'extra' -- a mapping object that keeps additional
+          index-related parameters - subitem 'indexed_attrs'
+          can be string with comma separated attribute names or
+          a list
 
           'caller' -- reference to the calling object (usually
           a (Z)Catalog instance
@@ -80,10 +82,12 @@ class UnIndex(SimpleItem):
 
         # allow index to index multiple attributes
         try:
-            self.indexed_attrs = extra.indexed_attrs.split(',')
-            self.indexed_attrs = [ 
-                attr.strip() for attr in  self.indexed_attrs if attr ]
-            if len(self.indexed_attrs) == 0: self.indexed_attrs = [ self.id ]
+            ia=extra['indexed_attrs']
+            if type(ia) in StringTypes:
+                self.indexed_attrs = ia.split(',')
+            else:
+                self.indexed_attrs = list(ia)
+            self.indexed_attrs = [ attr.strip() for attr in  self.indexed_attrs if attr ] or [self.id]
        except:
             self.indexed_attrs = [ self.id ]