Class DecodeWorker

java.lang.Object

com.google.zxing.client.j2se.DecodeWorker

All Implemented Interfaces:

Callable<Integer>

final class DecodeWorker
extends Object
implements Callable<Integer>

One of a pool of threads which pulls images off the Inputs queue and decodes them in parallel.

See Also:

• CommandLineRunner

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	BLACK
private final DecoderConfig	config
private final Map<DecodeHintType, ?>	hints
private final Queue<URI>	inputs
private static final int	RED
private static final int	WHITE

Constructor Summary

Constructors

Constructor	Description
DecodeWorker(DecoderConfig config, Queue<URI> inputs)

Method Summary

Modifier and Type	Method	Description
private static Path	buildOutputPath(URI input, String suffix)
Integer	call()
private Result[]	decode(URI uri, Map<DecodeHintType, ?> hints)
private static void	dumpBlackPoint(URI uri, BufferedImage image, BinaryBitmap bitmap)	Writes out a single PNG which is three times the width of the input image, containing from left to right: the original image, the row sampling monochrome version, and the 2D sampling monochrome version.
private static void	dumpResult(URI input, Result... results)
private static void	writeResultImage(int stride, int height, int[] pixels, URI input, String suffix)

Methods inherited from class Object

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

Field Details

RED

private static final int RED

See Also:

• Constant Field Values

BLACK

private static final int BLACK

See Also:

• Constant Field Values

WHITE

private static final int WHITE

See Also:

• Constant Field Values

config

private final DecoderConfig config

inputs

private final Queue<URI> inputs

hints

private final Map<DecodeHintType, ?> hints

Constructor Details

DecodeWorker

DecodeWorker(DecoderConfig config,
 Queue<URI> inputs)

Method Details

call

public Integer call()
             throws IOException

Specified by:

call in interface Callable<Integer>

Throws:

IOException

buildOutputPath

private static Path buildOutputPath(URI input,
 String suffix)
                             throws IOException

Throws:

IOException

dumpResult

private static void dumpResult(URI input,
 Result... results)
                        throws IOException

Throws:

IOException

decode

private Result[] decode(URI uri,
 Map<DecodeHintType, ?> hints)
                 throws IOException

Throws:

IOException

dumpBlackPoint

private static void dumpBlackPoint(URI uri,
 BufferedImage image,
 BinaryBitmap bitmap)
                            throws IOException

Writes out a single PNG which is three times the width of the input image, containing from left to right: the original image, the row sampling monochrome version, and the 2D sampling monochrome version.

Throws:

IOException

writeResultImage

private static void writeResultImage(int stride,
 int height,
 int[] pixels,
 URI input,
 String suffix)
                              throws IOException

Throws:

IOException