Package com.google.zxing.oned

Class Code93Reader

java.lang.Object

com.google.zxing.oned.OneDReader

com.google.zxing.oned.Code93Reader

All Implemented Interfaces:

Reader

public final class Code93Reader
extends OneDReader

Decodes Code 93 barcodes.

See Also:

Code39Reader

Field Summary

Fields

Modifier and Type	Field	Description
private static char[]	ALPHABET
(package private) static java.lang.String	ALPHABET_STRING
(package private) static int	ASTERISK_ENCODING
(package private) static int[]	CHARACTER_ENCODINGS	These represent the encodings of characters, as patterns of wide and narrow bars.
private int[]	counters
private java.lang.StringBuilder	decodeRowResult

Constructor Summary

Constructors

Constructor	Description
Code93Reader()

Method Summary

Modifier and Type	Method	Description
private static void	checkChecksums(java.lang.CharSequence result)
private static void	checkOneChecksum(java.lang.CharSequence result, int checkPosition, int weightMax)
private static java.lang.String	decodeExtended(java.lang.CharSequence encoded)
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[]	findAsteriskPattern(BitArray row)
private static char	patternToChar(int pattern)
private static int	toPattern(int[] counters)

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

ALPHABET_STRING

static final java.lang.String ALPHABET_STRING

See Also:

Constant Field Values

ALPHABET

private static final char[] ALPHABET

CHARACTER_ENCODINGS

static final int[] CHARACTER_ENCODINGS

These represent the encodings of characters, as patterns of wide and narrow bars. The 9 least-significant bits of each int correspond to the pattern of wide and narrow.

ASTERISK_ENCODING

static final int ASTERISK_ENCODING

decodeRowResult

private final java.lang.StringBuilder decodeRowResult

counters

private final int[] counters

Constructor Detail

Code93Reader

public Code93Reader()

Method Detail

decodeRow

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

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

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

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

findAsteriskPattern

private int[] findAsteriskPattern(BitArray row)
                           throws NotFoundException

Throws:

NotFoundException

toPattern

private static int toPattern(int[] counters)

patternToChar

private static char patternToChar(int pattern)
                           throws NotFoundException

Throws:

NotFoundException

decodeExtended

private static java.lang.String decodeExtended(java.lang.CharSequence encoded)
                                        throws FormatException

Throws:

FormatException

checkChecksums

private static void checkChecksums(java.lang.CharSequence result)
                            throws ChecksumException

Throws:

ChecksumException

checkOneChecksum

private static void checkOneChecksum(java.lang.CharSequence result,
                                     int checkPosition,
                                     int weightMax)
                              throws ChecksumException

Throws:

ChecksumException