org.h2.compress

类 CompressDeflate

java.lang.Object

org.h2.compress.CompressDeflate

所有已实现的接口:

Compressor

public class CompressDeflate
extends Object
implements Compressor

This is a wrapper class for the Deflater class. This algorithm supports the following options:

• l or level: -1 (default), 0 (no compression), 1 (best speed), ..., 9 (best compression)
• s or strategy: 0 (default), 1 (filtered), 2 (huffman only)

See also java.util.zip.Deflater for details.

字段概要

从接口继承的字段 org.h2.compress.Compressor

DEFLATE, LZF, NO

构造器概要

构造器

构造器和说明
CompressDeflate()

方法概要

限定符和类型	方法和说明
int	compress(byte[] in, int inLen, byte[] out, int outPos) Compress a number of bytes.
void	expand(byte[] in, int inPos, int inLen, byte[] out, int outPos, int outLen) Expand a number of compressed bytes.
int	getAlgorithm() Get the compression algorithm type.
void	setOptions(String options) Set the compression options.

从类继承的方法 java.lang.Object

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

构造器详细资料

CompressDeflate

public CompressDeflate()

方法详细资料

setOptions

public void setOptions(String options)

从接口复制的说明: Compressor

Set the compression options. This may include settings for higher performance but less compression.

指定者:

setOptions 在接口中 Compressor

参数:

options - the options

compress

public int compress(byte[] in,
                    int inLen,
                    byte[] out,
                    int outPos)

从接口复制的说明: Compressor

Compress a number of bytes.

指定者:

compress 在接口中 Compressor

参数:

in - the input data

inLen - the number of bytes to compress

out - the output area

outPos - the offset at the output array

返回:

the end position

getAlgorithm

public int getAlgorithm()

从接口复制的说明: Compressor

Get the compression algorithm type.

指定者:

getAlgorithm 在接口中 Compressor

返回:

the type

expand

public void expand(byte[] in,
                   int inPos,
                   int inLen,
                   byte[] out,
                   int outPos,
                   int outLen)

从接口复制的说明: Compressor

Expand a number of compressed bytes.

指定者:

expand 在接口中 Compressor

参数:

in - the compressed data

inPos - the offset at the input array

inLen - the number of bytes to read

out - the output area

outPos - the offset at the output array

outLen - the size of the uncompressed data