Package com.pd4ml.pdf.cos.filter

Class FlateDecodeFilter

java.lang.Object

com.pd4ml.pdf.cos.filter.FlateDecodeFilter

All Implemented Interfaces:

Filter

public class FlateDecodeFilter
extends java.lang.Object
implements Filter

/FlateDecode: standard zlib/deflate compression (RFC 1950), by far the most common PDF stream filter. Also applies the optional PNG "Predictor" post-processing used heavily by cross-reference streams and object streams.

Constructor Summary

Constructors

Constructor	Description
FlateDecodeFilter()

Method Summary

Modifier and Type	Method	Description
byte[]	decode(byte[] encoded, COSDictionary parameters, COSDictionary streamDict)	Decodes encoded using this filter's algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

FlateDecodeFilter

public FlateDecodeFilter()

Method Detail

decode

public byte[] decode(byte[] encoded,
                     COSDictionary parameters,
                     COSDictionary streamDict)
              throws java.io.IOException

Description copied from interface: Filter

Decodes encoded using this filter's algorithm.

Specified by:

decode in interface Filter

Parameters:

encoded - the filtered bytes, as stored in the file

parameters - this filter's DecodeParms dictionary (never null; empty if the stream had none)

streamDict - the owning stream's full dictionary, in case a filter needs sibling entries (unused by the filters implemented here, but kept for extensibility/parity with PDFBox's Filter API)

Throws:

java.io.IOException