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comparison src/org/dancres/blitz/mangler/EntrySizer.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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-1:000000000000 0:3dc0c5604566
1 package org.dancres.blitz.mangler;
2
3 import java.io.IOException;
4 import java.io.ByteArrayOutputStream;
5 import java.io.ObjectOutputStream;
6
7 import net.jini.core.entry.Entry;
8
9 /**
10 <p>Utility class to compute a rough indication of the number of bytes an
11 Entry will consume once written to a Blitz JavaSpace instance (persistent
12 or transient).</p>
13
14 <p>Basic usage is to construct an instance of EntrySizer and then invoke
15 computeSize for each Entry you're interested in.</p>
16 */
17 public class EntrySizer {
18 private EntryMangler theMangler = new EntryMangler();
19
20 public EntrySizer() {
21 }
22
23 public int computeSize(Entry anEntry) throws IOException {
24 MangledEntry myEntry = theMangler.mangle(anEntry);
25
26 ByteArrayOutputStream myBAOS = new ByteArrayOutputStream();
27 ObjectOutputStream myOOS = new ObjectOutputStream(myBAOS);
28
29 myOOS.writeObject(myEntry);
30 myOOS.close();
31
32 return myBAOS.size();
33 }
34 }