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annotate src/org/dancres/blitz/mangler/EntrySizer.java @ 32:243c74d599bf

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author Dan Creswell <dan.creswell@gmail.com>
date Sat, 12 Jun 2010 10:41:47 +0100
parents 3dc0c5604566
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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1 package org.dancres.blitz.mangler;
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3 import java.io.IOException;
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4 import java.io.ByteArrayOutputStream;
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5 import java.io.ObjectOutputStream;
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7 import net.jini.core.entry.Entry;
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8
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9 /**
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10 <p>Utility class to compute a rough indication of the number of bytes an
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11 Entry will consume once written to a Blitz JavaSpace instance (persistent
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12 or transient).</p>
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14 <p>Basic usage is to construct an instance of EntrySizer and then invoke
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15 computeSize for each Entry you're interested in.</p>
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16 */
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17 public class EntrySizer {
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18 private EntryMangler theMangler = new EntryMangler();
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20 public EntrySizer() {
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21 }
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23 public int computeSize(Entry anEntry) throws IOException {
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24 MangledEntry myEntry = theMangler.mangle(anEntry);
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26 ByteArrayOutputStream myBAOS = new ByteArrayOutputStream();
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27 ObjectOutputStream myOOS = new ObjectOutputStream(myBAOS);
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29 myOOS.writeObject(myEntry);
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30 myOOS.close();
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32 return myBAOS.size();
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33 }
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34 }