New serialization util methods.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@8344 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/util/cache/DummyExternalizableUtil.java

@@ -10,10 +10,7 @@
  */
 package org.jivesoftware.util.cache;
 
-import java.io.DataInput;
-import java.io.DataOutput;
-import java.io.Externalizable;
-import java.io.IOException;
+import java.io.*;
 import java.util.*;
 
 /**
@@ -150,6 +147,15 @@ public class DummyExternalizableUtil implements ExternalizableUtilStrategy {
         return new byte[0];
     }
 
+    public void writeSerializable(DataOutput out, Serializable value) throws IOException {
+        // Do nothing
+    }
+
+    public Serializable readSerializable(DataInput in) throws IOException {
+        // Do nothing
+        return null;
+    }
+
     public void writeSafeUTF(DataOutput out, String value) {
         // Do nothing
     }