Package com.google.zxing.oned.rss

Class RSS14Reader

java.lang.Object

com.google.zxing.oned.OneDReader

com.google.zxing.oned.rss.AbstractRSSReader

com.google.zxing.oned.rss.RSS14Reader

All Implemented Interfaces:

Reader

public final class RSS14Reader
extends AbstractRSSReader

Decodes RSS-14, including truncated and stacked variants. See ISO/IEC 24724:2006.

Field Summary

Fields

Modifier and Type	Field	Description
private static int[][]	FINDER_PATTERNS
private static int[]	INSIDE_GSUM
private static int[]	INSIDE_ODD_TOTAL_SUBSET
private static int[]	INSIDE_ODD_WIDEST
private static int[]	OUTSIDE_EVEN_TOTAL_SUBSET
private static int[]	OUTSIDE_GSUM
private static int[]	OUTSIDE_ODD_WIDEST
private java.util.List<Pair>	possibleLeftPairs
private java.util.List<Pair>	possibleRightPairs

Constructor Summary

Constructors

Constructor	Description
RSS14Reader()

Method Summary

Modifier and Type	Method	Description
private static void	addOrTally(java.util.Collection<Pair> possiblePairs, Pair pair)
private void	adjustOddEvenCounts(boolean outsideChar, int numModules)
private static boolean	checkChecksum(Pair leftPair, Pair rightPair)
private static Result	constructResult(Pair leftPair, Pair rightPair)
private DataCharacter	decodeDataCharacter(BitArray row, FinderPattern pattern, boolean outsideChar)
private Pair	decodePair(BitArray row, boolean right, int rowNumber, java.util.Map<DecodeHintType,?> hints)
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 int[]	findFinderPattern(BitArray row, boolean rightFinderPattern)
private FinderPattern	parseFoundFinderPattern(BitArray row, int rowNumber, boolean right, int[] startEnd)
void	reset()	Resets any internal state the implementation has after a decode, to prepare it for reuse.

Methods inherited from class com.google.zxing.oned.rss.AbstractRSSReader

count, decrement, getDataCharacterCounters, getDecodeFinderCounters, getEvenCounts, getEvenRoundingErrors, getOddCounts, getOddRoundingErrors, increment, isFinderPattern, parseFinderValue

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

decode, decode, patternMatchVariance, recordPattern, recordPatternInReverse

Methods inherited from class java.lang.Object

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

Field Detail

OUTSIDE_EVEN_TOTAL_SUBSET

private static final int[] OUTSIDE_EVEN_TOTAL_SUBSET

INSIDE_ODD_TOTAL_SUBSET

private static final int[] INSIDE_ODD_TOTAL_SUBSET

OUTSIDE_GSUM

private static final int[] OUTSIDE_GSUM

INSIDE_GSUM

private static final int[] INSIDE_GSUM

OUTSIDE_ODD_WIDEST

private static final int[] OUTSIDE_ODD_WIDEST

INSIDE_ODD_WIDEST

private static final int[] INSIDE_ODD_WIDEST

FINDER_PATTERNS

private static final int[][] FINDER_PATTERNS

possibleLeftPairs

private final java.util.List<Pair> possibleLeftPairs

possibleRightPairs

private final java.util.List<Pair> possibleRightPairs

Constructor Detail

RSS14Reader

public RSS14Reader()

Method Detail

decodeRow

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

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

addOrTally

private static void addOrTally(java.util.Collection<Pair> possiblePairs,
                               Pair pair)

reset

public void reset()

Description copied from interface: Reader

Resets any internal state the implementation has after a decode, to prepare it for reuse.

Specified by:

reset in interface Reader

Overrides:

reset in class OneDReader

constructResult

private static Result constructResult(Pair leftPair,
                                      Pair rightPair)

checkChecksum

private static boolean checkChecksum(Pair leftPair,
                                     Pair rightPair)

decodePair

private Pair decodePair(BitArray row,
                        boolean right,
                        int rowNumber,
                        java.util.Map<DecodeHintType,?> hints)

decodeDataCharacter

private DataCharacter decodeDataCharacter(BitArray row,
                                          FinderPattern pattern,
                                          boolean outsideChar)
                                   throws NotFoundException

Throws:

NotFoundException

findFinderPattern

private int[] findFinderPattern(BitArray row,
                                boolean rightFinderPattern)
                         throws NotFoundException

Throws:

NotFoundException

parseFoundFinderPattern

private FinderPattern parseFoundFinderPattern(BitArray row,
                                              int rowNumber,
                                              boolean right,
                                              int[] startEnd)
                                       throws NotFoundException

Throws:

NotFoundException

adjustOddEvenCounts

private void adjustOddEvenCounts(boolean outsideChar,
                                 int numModules)
                          throws NotFoundException

Throws:

NotFoundException