From d7a1d3449062b713963e7c31644764e4a04cb020 Mon Sep 17 00:00:00 2001
From: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Date: Mon, 10 Sep 2007 16:04:54 +0000
Subject: Add a parameter to datastore.find() for filtering out unwanted metadata properties.

---
diff --git a/src/olpc/datastore/datastore.py b/src/olpc/datastore/datastore.py
index f37bff3..91bdb4a 100644
--- a/src/olpc/datastore/datastore.py
+++ b/src/olpc/datastore/datastore.py
@@ -244,9 +244,9 @@ class DataStore(dbus.service.Object):
 
     #@utils.sanitize_dbus    
     @dbus.service.method(DS_DBUS_INTERFACE,
-             in_signature='a{sv}',
+             in_signature='a{sv}as',
              out_signature='aa{sv}u')
-    def find(self, query=None, **kwargs):
+    def find(self, query=None, properties=None, **kwargs):
         """find(query)
         takes a dict of parameters and returns data in the following
              format
@@ -354,6 +354,11 @@ class DataStore(dbus.service.Object):
                 props['filename'] = filename
             d.append(props)
 
+            if properties:
+                for name in props.keys():
+                    if name not in properties:
+                        del props[name]
+
         if limit:
             d = d[offset: offset+limit]
             
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