Package org.verapdf.cos.filters

Class COSFilterLZWDecode

java.lang.Object

java.io.InputStream

org.verapdf.as.io.ASInputStream

org.verapdf.as.filters.ASInFilter

org.verapdf.as.filters.io.ASBufferedInFilter

org.verapdf.cos.filters.COSFilterLZWDecode

All Implemented Interfaces:

Closeable, AutoCloseable

public class COSFilterLZWDecode
extends ASBufferedInFilter

This class implements LZW decoding.

Author:

Sergey Shemyakov

Field Summary

Fields inherited from class org.verapdf.as.filters.io.ASBufferedInFilter

BF_BUFFER_SIZE, buffer, START_BUFFER_SIZE

Fields inherited from class org.verapdf.as.io.ASInputStream

isClosed, isSourceClosed, resourceUsers

Constructor Summary

Constructors

Constructor	Description
COSFilterLZWDecode(ASInputStream stream, COSDictionary decodeParams)	Constructor from LZW encoded data stream and decode parameters dictionary.

Method Summary

Modifier and Type	Method	Description
int	read(byte[] buffer, int size)
void	reset()
int	skip(int size)	Skips given number of decoded bytes in stream.

Methods inherited from class org.verapdf.as.filters.io.ASBufferedInFilter

addToBuffer, bufferPop, bufferPopArray, bufferSize, closeResource, concatenate, feedBuffer, getBufferBegin, getBufferCapacity, getBufferEnd, getReadCounter, getStream, getStreamUntilToken, initialize, isEOF, peek, peek, processBuffer, read, readByte, resetReadCounter, unread, unread

Methods inherited from class org.verapdf.as.filters.ASInFilter

close, decrementResourceUsers, getInputStream, incrementResourceUsers, read, setInputStream

Methods inherited from class org.verapdf.as.io.ASInputStream

createStreamFromStream

Methods inherited from class java.io.InputStream

available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, skip, transferTo

Methods inherited from class java.lang.Object

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

Constructor Detail

COSFilterLZWDecode

public COSFilterLZWDecode(ASInputStream stream,
                          COSDictionary decodeParams)
                   throws IOException

Constructor from LZW encoded data stream and decode parameters dictionary.

Parameters:

stream - is LZW encoded data.

decodeParams - is decode parameters dictionary.

Throws:

IOException

Method Detail

read

public int read(byte[] buffer,
                int size)
         throws IOException

Overrides:

read in class ASBufferedInFilter

Throws:

IOException

skip

public int skip(int size)
         throws IOException

Skips given number of decoded bytes in stream.

Overrides:

skip in class ASBufferedInFilter

Parameters:

size - is amount of bytes to skip.

Returns:

amount of actually skipped bytes.

Throws:

IOException - if stream-reading error occurs.

reset

public void reset()
           throws IOException

Overrides:

reset in class ASBufferedInFilter

Throws:

IOException