Index: src/java/javax/jdo/PersistenceManager.java
===================================================================
--- src/java/javax/jdo/PersistenceManager.java	(revision 601047)
+++ src/java/javax/jdo/PersistenceManager.java	(working copy)
@@ -24,6 +24,8 @@
 
 import java.util.Collection;
 import java.util.Date;
+import java.util.EnumSet;
+import java.util.Set;
 
 import javax.jdo.datastore.JDOConnection;
 import javax.jdo.datastore.Sequence;
@@ -1191,7 +1193,7 @@
      * @return The objects
      * @since 2.1
      */
-    Collection getManagedObjects();
+    Set getManagedObjects();
 
     /**
      * Get the objects enlisted in the current transaction having the
@@ -1200,7 +1202,7 @@
      * @return The objects
      * @since 2.1
      */
-    Collection getManagedObjects(ObjectState... states);
+    Set getManagedObjects(EnumSet<ObjectState> states);
 
     /**
      * Get the objects enlisted in the current transaction being instances of
@@ -1209,5 +1211,14 @@
      * @return The objects
      * @since 2.1
      */
-    Collection getManagedObjects(Class... classes);
+    Set getManagedObjects(Class... classes);
+
+    /**
+     * Get the objects enlisted in the current transaction having the
+     * specified object states and being instances of the specified classes.
+     * @param states The states of objects that we are interested in
+     * @return The objects
+     * @since 2.1
+     */
+    Set getManagedObjects(EnumSet<ObjectState> states, Class... classes);
 }