Package org.apache.pdfbox.filter

Class Predictor.PredictorOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

org.apache.pdfbox.filter.Predictor.PredictorOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

Enclosing class:

Predictor

private static final class Predictor.PredictorOutputStream
extends FilterOutputStream

Output stream that implements predictor decoding. Data is buffered until a complete row is available, which is then decoded and written to the underlying stream. The previous row is retained for decoding the next row.

Field Summary

Fields

Modifier and Type	Field	Description
private final int	bitsPerComponent
private final int	colors
private final int	columns
private byte[]	currentRow
private int	currentRowData
private byte[]	lastRow
private int	predictor
private final boolean	predictorPerRow
private boolean	predictorRead
private final int	rowLength

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
PredictorOutputStream(OutputStream out, int predictor, int colors, int bitsPerComponent, int columns)

Method Summary

Modifier and Type	Method	Description
private void	decodeAndWriteRow()
private void	flipRows()	Flips the row buffers (to avoid copying), and resets the current-row index and predictorRead flag
void	flush()
void	write(byte[] bytes)
void	write(byte[] bytes, int off, int len)
void	write(int i)

Methods inherited from class java.io.FilterOutputStream

close

Methods inherited from class java.io.OutputStream

nullOutputStream

Methods inherited from class java.lang.Object

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

Field Details

predictor

private int predictor

colors

private final int colors

bitsPerComponent

private final int bitsPerComponent

columns

private final int columns

rowLength

private final int rowLength

predictorPerRow

private final boolean predictorPerRow

currentRow

private byte[] currentRow

lastRow

private byte[] lastRow

currentRowData

private int currentRowData

predictorRead

private boolean predictorRead

Constructor Details

PredictorOutputStream

PredictorOutputStream(OutputStream out,
 int predictor,
 int colors,
 int bitsPerComponent,
 int columns)

Method Details

write

public void write(byte[] bytes)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

write

public void write(byte[] bytes,
 int off,
 int len)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

decodeAndWriteRow

private void decodeAndWriteRow()
                        throws IOException

Throws:

IOException

flipRows

private void flipRows()

Flips the row buffers (to avoid copying), and resets the current-row index and predictorRead flag

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class FilterOutputStream

Throws:

IOException

write

public void write(int i)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException