Package com.tom_roush.pdfbox.filter

Class Filter

java.lang.Object

com.tom_roush.pdfbox.filter.Filter

Direct Known Subclasses:

LZWFilter

public abstract class Filter
extends Object

A filter for stream data.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Filter()	Constructor.

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Filter

protected Filter()

Constructor.

Method Detail

decode

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

Decodes data, producing the original non-encoded data.

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

public final void encode(InputStream input,
                         OutputStream encoded,
                         COSDictionary parameters,
                         int index)
                  throws IOException

Encodes data.

Parameters:

input - the byte stream to encode

encoded - the stream where encoded data will be written

parameters - the parameters used for encoding

index - the index to the filter being encoded

Throws:

IOException - if the stream cannot be encoded

encode

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

Throws:

IOException

getDecodeParams

protected static COSDictionary getDecodeParams(COSDictionary dictionary,
                                               int index)