com.gargoylesoftware.base.io
Class CondensedObjectOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.ObjectOutputStream
          com.gargoylesoftware.base.io.CondensedObjectOutputStream

All Implemented Interfaces:

DataOutput, ObjectOutput, ObjectStreamConstants

public class CondensedObjectOutputStream

extends ObjectOutputStream

A specialized subclass of ObjectOutputStream that is used to serialize objects. This stream will remove duplicate objects from the stream in order to shrink the resulting byte stream.

Only objects of the following types will be condensed: Character, Double, Integer, Long, Short and String. The biggest benefit will come from duplicate Strings.

Version:

$Revision: 1.4 $

Author:

Mike Bowler

Nested Class Summary

Nested classes inherited from class java.io.ObjectOutputStream

ObjectOutputStream.PutField

Field Summary

Fields inherited from interface java.io.ObjectStreamConstants

baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING

Constructor Summary

CondensedObjectOutputStream(OutputStream stream)
Create the stream

Method Summary

protected Object

replaceObject(Object object) Overrides the superclass to perform substitutions of duplicate immutable objects.

Methods inherited from class java.io.ObjectOutputStream

annotateClass, annotateProxyClass, close, defaultWriteObject, drain, enableReplaceObject, flush, putFields, reset, useProtocolVersion, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeClassDescriptor, writeDouble, writeFields, writeFloat, writeInt, writeLong, writeObject, writeObjectOverride, writeShort, writeStreamHeader, writeUnshared, writeUTF

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CondensedObjectOutputStream

public CondensedObjectOutputStream(OutputStream stream)
                            throws IOException

Create the stream

Parameters:

stream - The output stream that we are wrapping

Throws:

IOException - If the superclass throws an IOException in it's constructor.

Method Detail

replaceObject

protected Object replaceObject(Object object)

Overrides the superclass to perform substitutions of duplicate immutable objects.

Parameters:

object - The object to be serialized

Returns:

Either the object that was passed in or an identical object that had previously been passed in.