Modifier and Type	Class and Description
private static class	CCITTFaxDecoderStream.Node
private static class	CCITTFaxDecoderStream.Tree

Field Summary

Modifier and Type	Field and Description
pack-priv static final short[][]	BLACK_CODES
pack-priv static final short[][]	BLACK_RUN_LENGTHS
pack-priv static final CCITTFaxDecoderStream.Tree	blackRunTree
pack-priv int	buffer
pack-priv int	bufferPos
private int[]	changesCurrentRow
private int	changesCurrentRowCount
private int[]	changesReferenceRow
private int	changesReferenceRowCount
pack-priv static final CCITTFaxDecoderStream.Tree	codeTree
private final int	columns
private int	decodedLength
private int	decodedPos
private final byte[]	decodedRow
pack-priv static final CCITTFaxDecoderStream.Node	EOL
pack-priv static final CCITTFaxDecoderStream.Tree	eolOnlyTree
pack-priv static final CCITTFaxDecoderStream.Node	FILL
private int	lastChangingElement
private final boolean	optionByteAligned
private final boolean	optionG32D
private final boolean	optionG3Fill
private final boolean	optionUncompressed
private final int	type
pack-priv static final int	VALUE_EOL
pack-priv static final int	VALUE_FILL
pack-priv static final int	VALUE_HMODE
pack-priv static final int	VALUE_PASSMODE
public static final short[][]	WHITE_CODES
public static final short[][]	WHITE_RUN_LENGTHS
pack-priv static final CCITTFaxDecoderStream.Tree	whiteRunTree

Inherited from java.io.FilterInputStream:: in

Constructor Summary

Access Constructor and Description

Access	Constructor and Description
public	CCITTFaxDecoderStream(final InputStream the compressed CCITT stream. stream, final int the number of columns in the stream. columns, final int the type of stream, must be one of `COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE`, `COMPRESSION_CCITT_T4` or `COMPRESSION_CCITT_T6`. type, final long CCITT T.4 or T.6 options. options, final boolean enable byte alignment used in PDF files (EncodedByteAlign). byteAligned) Creates a CCITTFaxDecoderStream.

public

CCITTFaxDecoderStream(final InputStream

the compressed CCITT stream.

stream, final int

the number of columns in the stream.

columns, final int

the type of stream, must be one of COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE, COMPRESSION_CCITT_T4 or COMPRESSION_CCITT_T6.

type, final long

CCITT T.4 or T.6 options.

options, final boolean

enable byte alignment used in PDF files (EncodedByteAlign).

byteAligned)

Creates a CCITTFaxDecoderStream.

Method Summary

Modifier and Type	Method and Description
private void	decode1D()
private void	decode2D()
private void	decodeRow()
private void	decodeRowType2()
private void	decodeRowType4()
private void	decodeRowType6()
private int	decodeRun(final CCITTFaxDecoderStream.Tree tree)
private void	fetch()
private int	getNextChangingElement(final int a0, final boolean white)
public boolean	markSupported() Overrides java.io.FilterInputStream.markSupported. Tests if this input stream supports the `mark` and `reset` methods.
public int	read() Overrides java.io.FilterInputStream.read. Reads the next byte of data from the input stream.
public int	read(byte[] the buffer into which the data is read. b, int the start offset in array `b` at which the data is written. off, int the maximum number of bytes to read. len) Overrides java.io.FilterInputStream.read. Reads up to `len` bytes of data from this input stream into an array of bytes.
private boolean	readBit()
public synchronized void	reset() Overrides java.io.FilterInputStream.reset. Repositions this stream to the position at the time the `mark` method was last called on this input stream.
private void	resetBuffer()
public long	skip(long the number of bytes to be skipped. n) Overrides java.io.FilterInputStream.skip. Skips over and discards `n` bytes of data from the input stream.

Inherited from java.io.FilterInputStream:: available close mark read

Field Detail

BLACK_CODES	back to summary
pack-priv static final short[][] BLACK_CODES

BLACK_RUN_LENGTHS	back to summary
pack-priv static final short[][] BLACK_RUN_LENGTHS

blackRunTree	back to summary
pack-priv static final CCITTFaxDecoderStream.Tree blackRunTree

buffer	back to summary
pack-priv int buffer

bufferPos	back to summary
pack-priv int bufferPos

changesCurrentRow	back to summary
private int[] changesCurrentRow

changesCurrentRowCount	back to summary
private int changesCurrentRowCount

changesReferenceRow	back to summary
private int[] changesReferenceRow

changesReferenceRowCount	back to summary
private int changesReferenceRowCount

codeTree	back to summary
pack-priv static final CCITTFaxDecoderStream.Tree codeTree

columns	back to summary
private final int columns

decodedLength	back to summary
private int decodedLength

decodedPos	back to summary
private int decodedPos

decodedRow	back to summary
private final byte[] decodedRow

EOL	back to summary
pack-priv static final CCITTFaxDecoderStream.Node EOL

eolOnlyTree	back to summary
pack-priv static final CCITTFaxDecoderStream.Tree eolOnlyTree

FILL	back to summary
pack-priv static final CCITTFaxDecoderStream.Node FILL

lastChangingElement	back to summary
private int lastChangingElement

optionByteAligned	back to summary
private final boolean optionByteAligned

optionG32D	back to summary
private final boolean optionG32D

optionG3Fill	back to summary
private final boolean optionG3Fill

optionUncompressed	back to summary
private final boolean optionUncompressed

type	back to summary
private final int type

VALUE_EOL	back to summary
pack-priv static final int VALUE_EOL

VALUE_FILL	back to summary
pack-priv static final int VALUE_FILL

VALUE_HMODE	back to summary
pack-priv static final int VALUE_HMODE

VALUE_PASSMODE	back to summary
pack-priv static final int VALUE_PASSMODE

WHITE_CODES	back to summary
public static final short[][] WHITE_CODES

WHITE_RUN_LENGTHS	back to summary
public static final short[][] WHITE_RUN_LENGTHS

whiteRunTree	back to summary
pack-priv static final CCITTFaxDecoderStream.Tree whiteRunTree

Constructor Detail

CCITTFaxDecoderStream back to summary

CCITTFaxDecoderStream	back to summary
public CCITTFaxDecoderStream(final InputStream stream, final int columns, final int type, final long options, final boolean byteAligned) Creates a CCITTFaxDecoderStream. This constructor may be used for CCITT streams embedded in PDF files, which use EncodedByteAlign. Parameters stream:InputStream the compressed CCITT stream. columns:int the number of columns in the stream. type:int the type of stream, must be one of `COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE`, `COMPRESSION_CCITT_T4` or `COMPRESSION_CCITT_T6`. options:long CCITT T.4 or T.6 options. byteAligned:boolean enable byte alignment used in PDF files (EncodedByteAlign).

public CCITTFaxDecoderStream(final InputStream stream, final int columns, final int type, final long options, final boolean byteAligned)

Creates a CCITTFaxDecoderStream. This constructor may be used for CCITT streams embedded in PDF files, which use EncodedByteAlign.

Parameters

stream:InputStream: the compressed CCITT stream.
columns:int: the number of columns in the stream.
type:int: the type of stream, must be one of COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE, COMPRESSION_CCITT_T4 or COMPRESSION_CCITT_T6.
options:long: CCITT T.4 or T.6 options.
byteAligned:boolean: enable byte alignment used in PDF files (EncodedByteAlign).

Method Detail

decode1D	back to summary
private void decode1D() throws IOException

decode2D	back to summary
private void decode2D() throws IOException

decodeRow	back to summary
private void decodeRow() throws IOException

decodeRowType2	back to summary
private void decodeRowType2() throws IOException

decodeRowType4	back to summary
private void decodeRowType4() throws IOException

decodeRowType6	back to summary
private void decodeRowType6() throws IOException

decodeRun	back to summary
private int decodeRun(final CCITTFaxDecoderStream.Tree tree) throws IOException

fetch	back to summary
private void fetch() throws IOException

getNextChangingElement	back to summary
private int getNextChangingElement(final int a0, final boolean white)

markSupported back to summary

markSupported	back to summary
public boolean markSupported() Overrides java.io.FilterInputStream.markSupported. Doc from java.io.FilterInputStream.markSupported. Tests if this input stream supports the `mark` and `reset` methods. Returns:boolean `true` if this stream type supports the `mark` and `reset` method; `false` otherwise. Annotations @Override

public boolean markSupported()

Overrides java.io.FilterInputStream.markSupported.

Doc from java.io.FilterInputStream.markSupported.

Tests if this input stream supports the mark and reset methods.

Returns:boolean

true if this stream type supports the mark and reset method; false otherwise.

Annotations

@Override

read back to summary

read	back to summary
public int read() throws IOException Overrides java.io.FilterInputStream.read. Doc from java.io.FilterInputStream.read. Reads the next byte of data from the input stream. The value byte is returned as an `int` in the range `0` to `255`. If no byte is available because the end of the stream has been reached, the value `-1` is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown. Returns:int the next byte of data, or `-1` if the end of the stream is reached. Annotations @Override Exceptions IOException: if an I/O error occurs.

public int read() throws IOException

Overrides java.io.FilterInputStream.read.

Doc from java.io.FilterInputStream.read.

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Returns:int

the next byte of data, or -1 if the end of the stream is reached.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

read back to summary

read	back to summary
public int read(byte[] b, int off, int len) throws IOException Overrides java.io.FilterInputStream.read. Doc from java.io.FilterInputStream.read. Reads up to `len` bytes of data from this input stream into an array of bytes. If `len` is not zero, the method blocks until some input is available; otherwise, no bytes are read and `0` is returned. Parameters b:byte[] the buffer into which the data is read. off:int the start offset in array `b` at which the data is written. len:int the maximum number of bytes to read. Returns:int the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached. Annotations @Override Exceptions IOException: if an I/O error occurs.

public int read(byte[] b, int off, int len) throws IOException

Overrides java.io.FilterInputStream.read.

Doc from java.io.FilterInputStream.read.

Reads up to len bytes of data from this input stream into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.

Parameters

b:byte[]: the buffer into which the data is read.
off:int: the start offset in array b at which the data is written.
len:int: the maximum number of bytes to read.

Returns:int

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs.

readBit	back to summary
private boolean readBit() throws IOException

reset back to summary

reset	back to summary
public synchronized void reset() throws IOException Overrides java.io.FilterInputStream.reset. Doc from java.io.FilterInputStream.reset. Repositions this stream to the position at the time the `mark` method was last called on this input stream. Stream marks are intended to be used in situations where you need to read ahead a little to see what's in the stream. Often this is most easily done by invoking some general parser. If the stream is of the type handled by the parse, it just chugs along happily. If the stream is not of that type, the parser should toss an exception when it fails. If this happens within readlimit bytes, it allows the outer code to reset the stream and try another parser. Annotations @Override Exceptions IOException: if this stream has not been marked or if the mark has been invalidated.

public synchronized void reset() throws IOException

Overrides java.io.FilterInputStream.reset.

Doc from java.io.FilterInputStream.reset.

Repositions this stream to the position at the time the mark method was last called on this input stream.

Stream marks are intended to be used in situations where you need to read ahead a little to see what's in the stream. Often this is most easily done by invoking some general parser. If the stream is of the type handled by the parse, it just chugs along happily. If the stream is not of that type, the parser should toss an exception when it fails. If this happens within readlimit bytes, it allows the outer code to reset the stream and try another parser.

Annotations

@Override

Exceptions

IOException:: if this stream has not been marked or if the mark has been invalidated.

resetBuffer	back to summary
private void resetBuffer()

skip back to summary

public long skip(long n) throws IOException

Overrides java.io.FilterInputStream.skip.

Doc from java.io.FilterInputStream.skip.

Skips over and discards n bytes of data from the input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. The actual number of bytes skipped is returned.

Parameters

n:long: the number of bytes to be skipped.

Returns:long

the actual number of bytes skipped.

Annotations

@Override

Exceptions

IOException:: if in.skip(n) throws an IOException.

org.apache.pdfbox.filter back to summary

private final Class CCITTFaxDecoderStream.Node

Class Inheritance

extends Object

java.lang.Object
org.apache.pdfbox.filter.CCITTFaxDecoderStream.Node

Field Summary

Modifier and Type	Field and Description
pack-priv boolean	canBeFill
pack-priv boolean	isLeaf
pack-priv CCITTFaxDecoderStream.Node	left
pack-priv CCITTFaxDecoderStream.Node	right
pack-priv int	value

Constructor Summary

Access	Constructor and Description
private	Node()

Method Summary

Modifier and Type	Method and Description
pack-priv void	set(final boolean next, final CCITTFaxDecoderStream.Node node)
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.
pack-priv CCITTFaxDecoderStream.Node	walk(final boolean next)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

Field Detail

canBeFill	back to summary
pack-priv boolean canBeFill

isLeaf	back to summary
pack-priv boolean isLeaf

left	back to summary
pack-priv CCITTFaxDecoderStream.Node left

right	back to summary
pack-priv CCITTFaxDecoderStream.Node right

value	back to summary
pack-priv int value

Constructor Detail

Node	back to summary
private Node()

Method Detail

set	back to summary
pack-priv void set(final boolean next, final CCITTFaxDecoderStream.Node node)

toString back to summary

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String

a string representation of the object

Annotations

@Override

walk	back to summary
pack-priv CCITTFaxDecoderStream.Node walk(final boolean next)

pack-priv final Class CCITTFaxDecoderStream

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class CCITTFaxDecoderStream.Node

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Class CCITTFaxDecoderStream.Tree

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

Modifier and Type	Method and Description
pack-priv void	fill(final int depth, final int path, final int value)
pack-priv void	fill(final int depth, final int path, final CCITTFaxDecoderStream.Node node)