--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/mangler/EntrySizer.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,34 @@
+package org.dancres.blitz.mangler;
+
+import java.io.IOException;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectOutputStream;
+
+import net.jini.core.entry.Entry;
+
+/**
+   <p>Utility class to compute a rough indication of the number of bytes an
+   Entry will consume once written to a Blitz JavaSpace instance (persistent
+   or transient).</p>
+
+   <p>Basic usage is to construct an instance of EntrySizer and then invoke
+   computeSize for each Entry you're interested in.</p>
+ */
+public class EntrySizer {
+    private EntryMangler theMangler = new EntryMangler();
+
+    public EntrySizer() {
+    }
+
+    public int computeSize(Entry anEntry) throws IOException {
+        MangledEntry myEntry = theMangler.mangle(anEntry);
+
+        ByteArrayOutputStream myBAOS = new ByteArrayOutputStream();
+        ObjectOutputStream myOOS = new ObjectOutputStream(myBAOS);
+
+        myOOS.writeObject(myEntry);
+        myOOS.close();
+
+        return myBAOS.size();
+    }
+}
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