com.etymon.pjx.stream
Class PdfFlateFilter

java.lang.Object
  com.etymon.pjx.stream.PdfFlateFilter

All Implemented Interfaces:

PdfStreamFilter

public class PdfFlateFilter
extends java.lang.Object
implements PdfStreamFilter

Implements a stream filter for Flate compression (based on zlib/deflate). This class is synchronized.

Field Summary

protected byte[]	_ba A byte array used for buffering.
(package private) java.util.zip.Deflater	_deflater Instance used for deflating.
(package private) java.util.zip.Inflater	_inflater Instance used for inflating.
protected PdfManager	_m The manager associated with the PDF document.
protected static PdfName	PDFNAME_FILTER
protected static PdfName	PDFNAME_FLATEDECODE

Constructor Summary

PdfFlateFilter(PdfManager manager)
Constructs an instance of this class with a specified manager instance.

Method Summary

PdfStream	decode(PdfStream stream) Decodes a stream using this filter's decoding method.
PdfStream	encode(PdfStream stream) Encodes a stream using this filter's encoding method.
PdfName	getName() Returns the name of this filter method.

Methods inherited from class java.lang.Object

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

Field Detail

PDFNAME_FILTER

protected static final PdfName PDFNAME_FILTER

PDFNAME_FLATEDECODE

protected static final PdfName PDFNAME_FLATEDECODE

_m

protected PdfManager _m

The manager associated with the PDF document.

_ba

protected byte[] _ba

A byte array used for buffering.

_deflater

java.util.zip.Deflater _deflater

Instance used for deflating.

_inflater

java.util.zip.Inflater _inflater

Instance used for inflating.

Constructor Detail

PdfFlateFilter

public PdfFlateFilter(PdfManager manager)

Constructs an instance of this class with a specified manager instance.

Parameters:

manager - the manager instance.

Method Detail

getName

public PdfName getName()

Description copied from interface: PdfStreamFilter

Returns the name of this filter method. This is the name to be used in the stream dictionary.

Specified by:

getName in interface PdfStreamFilter

encode

public PdfStream encode(PdfStream stream)
                 throws java.io.IOException,
                        PdfFormatException

Description copied from interface: PdfStreamFilter

Encodes a stream using this filter's encoding method.

Specified by:

encode in interface PdfStreamFilter

Parameters:

stream - the stream to encode.

Returns:

the encoded stream.

Throws:

PdfFormatException

java.io.IOException

decode

public PdfStream decode(PdfStream stream)
                 throws java.io.IOException,
                        PdfFormatException,
                        PdfDecoderFormatException

Description copied from interface: PdfStreamFilter

Decodes a stream using this filter's decoding method.

Specified by:

decode in interface PdfStreamFilter

Parameters:

stream - the stream to decode.

Returns:

the decoded stream.

Throws:

PdfFormatException

java.io.IOException

PdfDecoderFormatException