com.izforge.izpack.compressor

Class DefaultPackCompressor

java.lang.Object

com.izforge.izpack.compressor.PackCompressorBase

com.izforge.izpack.compressor.DefaultPackCompressor

All Implemented Interfaces:

PackCompressor

public class DefaultPackCompressor
extends PackCompressorBase

IzPack will be able to support different compression methods for the packs included in the installation jar file. This class implements the PackCompressor for the compression format "default" which is current the LZ77 implementation of zlib (also known as zip or deflate).

Author:

Klaus Bartz

Field Summary

Fields

Modifier and Type	Field and Description
private static java.lang.String[]	THIS_CONTAINER_PATH
private static java.lang.String[][]	THIS_DECODER_CLASS_NAMES
private static java.lang.String	THIS_DECODER_MAPPER
private static java.lang.String	THIS_ENCODER_CLASS_NAME
private static java.lang.String[]	THIS_FORMAT_NAMES

Fields inherited from class com.izforge.izpack.compressor.PackCompressorBase

containerPaths, decoderClassNames, decoderMapper, encoderClassName, formatNames, paramsClasses

Constructor Summary

Constructors

Constructor and Description
DefaultPackCompressor()

Method Summary

Methods

Modifier and Type	Method and Description
java.io.OutputStream	getOutputStream(java.io.OutputStream os) Returns a newly created output stream which write method writes the given input encoded to the defined output stream.
boolean	needsBufferedOutputStream() Returns whether a buffered output stream should be used intermediate between the output stream of this compressor and the destination.
boolean	useStandardCompression() Returns whether the standard comression should be used with this pack compressor or not.

Methods inherited from class com.izforge.izpack.compressor.PackCompressorBase

getCompressionFormatSymbols, getCompressionLevel, getContainerPaths, getDecoderClassNames, getDecoderMapperName, getEncoderClassName, getOutputInstance, loadClass, resolveConstructorParams, setCompiler, setCompressionLevel

Methods inherited from class java.lang.Object

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

Field Detail

THIS_FORMAT_NAMES

private static final java.lang.String[] THIS_FORMAT_NAMES

THIS_CONTAINER_PATH

private static final java.lang.String[] THIS_CONTAINER_PATH

THIS_DECODER_MAPPER

private static final java.lang.String THIS_DECODER_MAPPER

THIS_DECODER_CLASS_NAMES

private static final java.lang.String[][] THIS_DECODER_CLASS_NAMES

THIS_ENCODER_CLASS_NAME

private static final java.lang.String THIS_ENCODER_CLASS_NAME

Constructor Detail

DefaultPackCompressor

public DefaultPackCompressor()

Method Detail

getOutputStream

public java.io.OutputStream getOutputStream(java.io.OutputStream os)

Description copied from interface: PackCompressor

Returns a newly created output stream which write method writes the given input encoded to the defined output stream. Attention! This method will be returned a valid output stream only if it is used in the IzPack compiler, or if this pack compressor needs no external classes. A call in the installation should be throw if external classes are used. The implementation should load the needed classes via reflection because classes are not present in the installation.

Parameters:

os - output stream to be used as listener

Returns:

a newly created encoding output stream

useStandardCompression

public boolean useStandardCompression()

Description copied from interface: PackCompressor

Returns whether the standard comression should be used with this pack compressor or not. If this method returns true, the returns values of the methods getContainerPath and getDecoderClassNames are not valid (should be null).

Specified by:

useStandardCompression in interface PackCompressor

Overrides:

useStandardCompression in class PackCompressorBase

Returns:

whether the standard comression should be used or not

needsBufferedOutputStream

public boolean needsBufferedOutputStream()

Description copied from interface: PackCompressor

Returns whether a buffered output stream should be used intermediate between the output stream of this compressor and the destination.

Specified by:

needsBufferedOutputStream in interface PackCompressor

Overrides:

needsBufferedOutputStream in class PackCompressorBase

Returns:

wether a buffered output stream should be used intermediate between the output stream of this compressor and the destination.