Package org.aspectj.weaver

Class CompressingDataOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.DataOutputStream

org.aspectj.weaver.CompressingDataOutputStream

All Implemented Interfaces:

Closeable, DataOutput, Flushable, AutoCloseable

public class CompressingDataOutputStream
extends 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

Fields

Modifier and Type	Field	Description
boolean	compressionEnabled

Fields inherited from class java.io.DataOutputStream

written

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
CompressingDataOutputStream(ByteArrayOutputStream baos, ConstantPoolWriter constantPoolWriter)
CompressingDataOutputStream(FileOutputStream fos)

Method Summary

Modifier and Type	Method	Description
boolean	canCompress()
int	compressFilepath(String filepath)
int	compressName(String name)
int	compressSignature(String signature)
void	writeCompressedName(String name)
void	writeCompressedPath(String path)
void	writeCompressedSignature(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.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Field Details

compressionEnabled

public boolean compressionEnabled

Constructor Details

CompressingDataOutputStream

public CompressingDataOutputStream(ByteArrayOutputStream baos,
 ConstantPoolWriter constantPoolWriter)

CompressingDataOutputStream

public CompressingDataOutputStream(FileOutputStream fos)

Method Details

canCompress

public boolean canCompress()

compressSignature

public int compressSignature(String signature)

Parameters:

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

Returns:

the constant pool index

compressFilepath

public int compressFilepath(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(String name)

Parameters:

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

Returns:

the constant pool index

writeCompressedName

public void writeCompressedName(String name)
                         throws IOException

Parameters:

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

Throws:

IOException

writeCompressedSignature

public void writeCompressedSignature(String signature)
                              throws IOException

Parameters:

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

Throws:

IOException

writeCompressedPath

public void writeCompressedPath(String path)
                         throws IOException

Parameters:

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

Throws:

IOException