com.itextpdf.kernel.pdf.filters

Class FlateDecodeFilter

java.lang.Object

com.itextpdf.kernel.pdf.MemoryLimitsAwareFilter

com.itextpdf.kernel.pdf.filters.FlateDecodeFilter

All Implemented Interfaces:

IFilterHandler

Direct Known Subclasses:

FlateDecodeStrictFilter

public class FlateDecodeFilter
extends MemoryLimitsAwareFilter

Handles FlateDecode filter.

Constructor Summary

Constructors

Constructor and Description
FlateDecodeFilter()

Method Summary

Modifier and Type	Method and Description
byte[]	decode(byte[] b, PdfName filterName, PdfObject decodeParams, PdfDictionary streamDictionary) Decode the byte[] using the provided filterName.
static byte[]	decodePredictor(byte[] in, PdfObject decodeParams)
static byte[]	flateDecode(byte[] in, boolean strict) A helper to flateDecode.
protected static byte[]	flateDecodeInternal(byte[] in, boolean strict, ByteArrayOutputStream out) A helper to flateDecode.

Methods inherited from class com.itextpdf.kernel.pdf.MemoryLimitsAwareFilter

enableMemoryLimitsAwareHandler

Methods inherited from class java.lang.Object

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

Constructor Detail

FlateDecodeFilter

public FlateDecodeFilter()

Method Detail

flateDecode

public static byte[] flateDecode(byte[] in,
                                 boolean strict)

A helper to flateDecode.

Parameters:

in - the input data

strict - true to read a correct stream. false to try to read a corrupted stream.

Returns:

the decoded data

decodePredictor

public static byte[] decodePredictor(byte[] in,
                                     PdfObject decodeParams)

Parameters:

in - Input byte array.

decodeParams - PdfDictionary of decodeParams.

Returns:

a byte array

decode

public byte[] decode(byte[] b,
                     PdfName filterName,
                     PdfObject decodeParams,
                     PdfDictionary streamDictionary)

Decode the byte[] using the provided filterName.

Parameters:

b - the bytes that need to be decoded

filterName - PdfName of the filter

decodeParams - decode parameters

streamDictionary - the dictionary of the stream. Can contain additional information needed to decode the byte[].

Returns:

decoded byte array

flateDecodeInternal

protected static byte[] flateDecodeInternal(byte[] in,
                                            boolean strict,
                                            ByteArrayOutputStream out)

A helper to flateDecode.

Parameters:

in - the input data

strict - true to read a correct stream. false to try to read a corrupted stream.

out - the out stream which will be used to write the bytes.

Returns:

the decoded data