optimizations to IntPairMap.java

[sbp.git] / src / edu / berkeley / sbp / util / TopologicalBag.java

diff --git a/src/edu/berkeley/sbp/util/TopologicalBag.java b/src/edu/berkeley/sbp/util/TopologicalBag.java
index 2595602..28166fb 100644 (file)
--- a/src/edu/berkeley/sbp/util/TopologicalBag.java
+++ b/src/edu/berkeley/sbp/util/TopologicalBag.java
@@ -1,3 +1,5 @@
+// Copyright 2006-2007 all rights reserved; see LICENSE file for BSD-style license
+
 package edu.berkeley.sbp.util;
 import edu.berkeley.sbp.util.*;
 import edu.berkeley.sbp.*;
@@ -12,7 +14,7 @@ import java.lang.ref.*;
 //
 
 /** a mapping from topologies over <tt>K</tt> to <i>sets of</i> values of type <tt>V</tt> */
-public class TopologicalBag<K,V> implements MapBag<Topology<K>,V>, VisitableMap<K,V> {
+public class TopologicalBag<K,V> implements MapBag<Topology<K>,V>, VisitableMap<K,V>, Serializable {
 
     // CRUCIAL INVARIANT: keys in this hashmap MUST be disjoint or the universe will implode
     private final HashMap<Topology<K>,HashSet<V>> h = new HashMap<Topology<K>,HashSet<V>>();