Package org.jpedal.io.filter

Class Flate

java.lang.Object

com.idrsolutions.image.filter.Filter

org.jpedal.io.filter.Flate

public class Flate
extends Filter

Flate

Constructor Summary

Constructors

Constructor	Description
Flate(FilterOptions options)

Method Summary

Modifier and Type	Method	Description
byte[]	decode(byte[] data)	Flate decode - use a byte array stream to decompress data in memory
void	decode(BufferedInputStream bis, BufferedOutputStream streamCache, String cacheName, Map<String,String> cachedObjects)	Flate decode
byte[]	encode(byte[] data)	Flate encode
static byte[]	encode(byte[] data, int compressionLevel)	Flate encode
void	encode(BufferedInputStream bis, BufferedOutputStream bos)	Flate encoding for Streams is currently unsupported
static byte[]	encodeLF(byte[] data, int compressionLevel)	Flate encode with an LF appended to the end.
static byte[]	encodeLF(ByteBuffer data, int compressionLevel)	Flate encode with an LF appended to the end.
boolean	hasError()	inherited by several methods

Methods inherited from class com.idrsolutions.image.filter.Filter

setEncHash, setupCachedObjectForDecoding

Methods inherited from class java.lang.Object

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

Constructor Details

Flate

public Flate(FilterOptions options)

Method Details

decode

public byte[] decode(byte[] data)
              throws Exception

Flate decode - use a byte array stream to decompress data in memory

Specified by:

decode in class Filter

Parameters:

data - byte[] to decode

Returns:

byte[] of decompressed data

Throws:

Exception

decode

public void decode(BufferedInputStream bis,
 BufferedOutputStream streamCache,
 String cacheName,
 Map<String,String> cachedObjects)
            throws Exception

Flate decode

Specified by:

decode in class Filter

Parameters:

bis - BufferedInputStream

streamCache - BufferedOutputStream

cacheName - Name of the cache object

cachedObjects - Map of cached objects

Throws:

Exception

encode

public byte[] encode(byte[] data)

Flate encode

Specified by:

encode in class Filter

Parameters:

data - Byte[] to be compressed

Returns:

byte[] of compressed data

encode

public static byte[] encode(byte[] data,
 int compressionLevel)

Flate encode

Parameters:

data - the byte[] to be compressed

compressionLevel - the level of compression

Returns:

a byte[] of compressed data

encodeLF

public static byte[] encodeLF(byte[] data,
 int compressionLevel)

Flate encode with an LF appended to the end.

Note that the LF is not part of the stream so when setting the stream Length in the dictionary, use (length - 1)

Parameters:

data - the byte[] to be compressed

compressionLevel - the level of compression

Returns:

a byte[] of compressed data

encodeLF

public static byte[] encodeLF(ByteBuffer data,
 int compressionLevel)

Flate encode with an LF appended to the end.

Note that the LF is not part of the stream so when setting the stream Length in the dictionary, use (length - 1)

Parameters:

data - the ByteBuffer to be compressed

compressionLevel - the level of compression

Returns:

a byte[] of compressed data

encode

public void encode(BufferedInputStream bis,
 BufferedOutputStream bos)
            throws Exception

Flate encoding for Streams is currently unsupported

Specified by:

encode in class Filter

Throws:

Exception

hasError

public boolean hasError()

Description copied from class: Filter

inherited by several methods

Overrides:

hasError in class Filter

Returns:

true if there is an error