org.aspectj.weaver
Class CompressingDataOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          java.io.DataOutputStream
              org.aspectj.weaver.CompressingDataOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.DataOutput, java.io.Flushable

public class CompressingDataOutputStream
extends java.io.DataOutputStream

A variation of a DataOutputStream that is linked to a constant pool writer. The linked constant pool can be used to compress objects into to simple index references into the constant pool. The corresponding decompression is done in the VersionedDataInputStream.

Author:

Andy Clement

Field Summary

boolean

compressionEnabled

Constructor Summary

CompressingDataOutputStream(java.io.ByteArrayOutputStream baos, ConstantPoolWriter constantPoolWriter)

CompressingDataOutputStream(java.io.FileOutputStream fos)

Method Summary

boolean	canCompress()
int	compressFilepath(java.lang.String filepath)
int	compressName(java.lang.String name)
int	compressSignature(java.lang.String signature)
void	writeCompressedName(java.lang.String name)
void	writeCompressedPath(java.lang.String path)
void	writeCompressedSignature(java.lang.String signature)

Methods inherited from class java.io.DataOutputStream

flush, size, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.io.FilterOutputStream

close, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Field Detail

compressionEnabled

public boolean compressionEnabled

Constructor Detail

CompressingDataOutputStream

public CompressingDataOutputStream(java.io.ByteArrayOutputStream baos,
                                   ConstantPoolWriter constantPoolWriter)

CompressingDataOutputStream

public CompressingDataOutputStream(java.io.FileOutputStream fos)

Method Detail

canCompress

public boolean canCompress()

compressSignature

public int compressSignature(java.lang.String signature)

Parameters:

signature - of the form 'La/b/c/d;'

Returns:

the constant pool index

compressFilepath

public int compressFilepath(java.lang.String filepath)

Parameters:

filepath - a file system path 'c:\a\b\c.txt' or '/a/b/c.txt'

Returns:

the constant pool index

compressName

public int compressName(java.lang.String name)

Parameters:

name - a simple name (for example a method or field name)

Returns:

the constant pool index

writeCompressedName

public void writeCompressedName(java.lang.String name)
                         throws java.io.IOException

Parameters:

name - a simple name (for example a method or field name)

Throws:

java.io.IOException

writeCompressedSignature

public void writeCompressedSignature(java.lang.String signature)
                              throws java.io.IOException

Parameters:

signature - of the form 'La/b/c/d;'

Throws:

java.io.IOException

writeCompressedPath

public void writeCompressedPath(java.lang.String path)
                         throws java.io.IOException

Parameters:

path - a file system path 'c:\a\b\c.txt' or '/a/b/c.txt'

Throws:

java.io.IOException