Package com.google.zxing.oned

Class Code39Reader

java.lang.Object

com.google.zxing.oned.OneDReader

com.google.zxing.oned.Code39Reader

All Implemented Interfaces:

Reader

public final class Code39Reader
extends OneDReader

Decodes Code 39 barcodes. Supports "Full ASCII Code 39" if USE_CODE_39_EXTENDED_MODE is set.

Author:

Sean Owen

See Also:

• Code93Reader

Constructor Summary

Constructors

Constructor	Description
Code39Reader()	Creates a reader that assumes all encoded data is data, and does not treat the final character as a check digit.
Code39Reader(boolean usingCheckDigit)	Creates a reader that can be configured to check the last character as a check digit.
Code39Reader(boolean usingCheckDigit, boolean extendedMode)	Creates a reader that can be configured to check the last character as a check digit, or optionally attempt to decode "extended Code 39" sequences that are used to encode the full ASCII character set.

Method Summary

Modifier and Type	Method	Description
Result	decodeRow(int rowNumber, BitArray row, Map<DecodeHintType,?> hints)	Attempts to decode a one-dimensional barcode format given a single row of an image.

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

Constructor Details

Code39Reader

public Code39Reader()

Creates a reader that assumes all encoded data is data, and does not treat the final character as a check digit. It will not decoded "extended Code 39" sequences.

Code39Reader

public Code39Reader(boolean usingCheckDigit)

Creates a reader that can be configured to check the last character as a check digit. It will not decoded "extended Code 39" sequences.

Parameters:

usingCheckDigit - if true, treat the last data character as a check digit, not data, and verify that the checksum passes.

Code39Reader

public Code39Reader(boolean usingCheckDigit,
 boolean extendedMode)

Creates a reader that can be configured to check the last character as a check digit, or optionally attempt to decode "extended Code 39" sequences that are used to encode the full ASCII character set.

Parameters:

usingCheckDigit - if true, treat the last data character as a check digit, not data, and verify that the checksum passes.

extendedMode - if true, will attempt to decode extended Code 39 sequences in the text.

Method Details

decodeRow

public Result decodeRow(int rowNumber,
 BitArray row,
 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