Package com.tom_roush.pdfbox.filter

Class LZWFilter

java.lang.Object

com.tom_roush.pdfbox.filter.Filter

com.tom_roush.pdfbox.filter.LZWFilter

public class LZWFilter
extends Filter

This is the filter used for the LZWDecode filter.

Field Summary

Fields

Modifier and Type	Field	Description
static long	CLEAR_TABLE	The LZW clear table code.
static long	EOD	The LZW end of data code.

Fields inherited from class com.tom_roush.pdfbox.filter.Filter

SYSPROP_DEFLATELEVEL

Constructor Summary

Constructors

Constructor	Description
LZWFilter()

Method Summary

Modifier and Type	Method	Description
DecodeResult	decode(InputStream encoded, OutputStream decoded, COSDictionary parameters, int index)	Decodes data, producing the original non-encoded data.
protected void	encode(InputStream rawData, OutputStream encoded, COSDictionary parameters)

Methods inherited from class com.tom_roush.pdfbox.filter.Filter

decode, encode, getCompressionLevel, getDecodeParams

Methods inherited from class java.lang.Object

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

Field Detail

CLEAR_TABLE

public static final long CLEAR_TABLE

The LZW clear table code.

See Also:

Constant Field Values

EOD

public static final long EOD

The LZW end of data code.

See Also:

Constant Field Values

Constructor Detail

LZWFilter

public LZWFilter()

Method Detail

decode

public DecodeResult decode(InputStream encoded,
                           OutputStream decoded,
                           COSDictionary parameters,
                           int index)
                    throws IOException

Decodes data, producing the original non-encoded data.

Specified by:

decode in class Filter

Parameters:

encoded - the encoded byte stream

decoded - the stream where decoded data will be written

parameters - the parameters used for decoding

index - the index to the filter being decoded

Returns:

repaired parameters dictionary, or the original parameters dictionary

Throws:

IOException - if the stream cannot be decoded

encode

protected void encode(InputStream rawData,
                      OutputStream encoded,
                      COSDictionary parameters)
               throws IOException

Specified by:

encode in class Filter

Throws:

IOException