Package com.google.zxing.oned

Class Code128Reader

java.lang.Object

com.google.zxing.oned.OneDReader

com.google.zxing.oned.Code128Reader

All Implemented Interfaces:

Reader

public final class Code128Reader
extends OneDReader

Decodes Code 128 barcodes.

Field Summary

Fields

Modifier and Type	Field	Description
private static int	CODE_CODE_A
private static int	CODE_CODE_B
private static int	CODE_CODE_C
private static int	CODE_FNC_1
private static int	CODE_FNC_2
private static int	CODE_FNC_3
private static int	CODE_FNC_4_A
private static int	CODE_FNC_4_B
(package private) static int[][]	CODE_PATTERNS
private static int	CODE_SHIFT
private static int	CODE_START_A
private static int	CODE_START_B
private static int	CODE_START_C
private static int	CODE_STOP
private static float	MAX_AVG_VARIANCE
private static float	MAX_INDIVIDUAL_VARIANCE

Constructor Summary

Constructors

Constructor	Description
Code128Reader()

Method Summary

Modifier and Type	Method	Description
private static int	decodeCode(BitArray row, int[] counters, int rowOffset)
Result	decodeRow(int rowNumber, BitArray row, java.util.Map<DecodeHintType,?> hints)	Attempts to decode a one-dimensional barcode format given a single row of an image.
private static int[]	findStartPattern(BitArray row)

Methods inherited from class com.google.zxing.oned.OneDReader

decode, decode, patternMatchVariance, recordPattern, recordPatternInReverse, reset

Methods inherited from class java.lang.Object

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

Field Detail

CODE_PATTERNS

static final int[][] CODE_PATTERNS

MAX_AVG_VARIANCE

private static final float MAX_AVG_VARIANCE

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Constant Field Values

MAX_INDIVIDUAL_VARIANCE

private static final float MAX_INDIVIDUAL_VARIANCE

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Constant Field Values

CODE_SHIFT

private static final int CODE_SHIFT

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Constant Field Values

CODE_CODE_C

private static final int CODE_CODE_C

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Constant Field Values

CODE_CODE_B

private static final int CODE_CODE_B

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Constant Field Values

CODE_CODE_A

private static final int CODE_CODE_A

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Constant Field Values

CODE_FNC_1

private static final int CODE_FNC_1

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Constant Field Values

CODE_FNC_2

private static final int CODE_FNC_2

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Constant Field Values

CODE_FNC_3

private static final int CODE_FNC_3

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Constant Field Values

CODE_FNC_4_A

private static final int CODE_FNC_4_A

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Constant Field Values

CODE_FNC_4_B

private static final int CODE_FNC_4_B

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Constant Field Values

CODE_START_A

private static final int CODE_START_A

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Constant Field Values

CODE_START_B

private static final int CODE_START_B

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Constant Field Values

CODE_START_C

private static final int CODE_START_C

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Constant Field Values

CODE_STOP

private static final int CODE_STOP

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Constant Field Values

Constructor Detail

Code128Reader

public Code128Reader()

Method Detail

findStartPattern

private static int[] findStartPattern(BitArray row)
                               throws NotFoundException

Throws:

NotFoundException

decodeCode

private static int decodeCode(BitArray row,
                              int[] counters,
                              int rowOffset)
                       throws NotFoundException

Throws:

NotFoundException

decodeRow

public Result decodeRow(int rowNumber,
                        BitArray row,
                        java.util.Map<DecodeHintType,?> hints)
                 throws NotFoundException,
                        FormatException,
                        ChecksumException

Description copied from class: OneDReader

Attempts to decode a one-dimensional barcode format given a single row of an image.

Specified by:

decodeRow in class OneDReader

Parameters:

rowNumber - row number from top of the row

row - the black/white pixel data of the row

hints - decode hints

Returns:

Result containing encoded string and start/end of barcode

Throws:

NotFoundException - if no potential barcode is found

FormatException - if a potential barcode is found but format is invalid

ChecksumException - if a potential barcode is found but does not pass its checksum