com.google.zxing.oned
Class EAN13Reader

java.lang.Object
  com.google.zxing.oned.OneDReader
      com.google.zxing.oned.UPCEANReader
          com.google.zxing.oned.EAN13Reader

All Implemented Interfaces:

Reader

public final class EAN13Reader
extends UPCEANReader

Implements decoding of the EAN-13 format.

Author:

dswitkin@google.com (Daniel Switkin), Sean Owen, alasdair@google.com (Alasdair Mackintosh)

Field Summary

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

INTEGER_MATH_SHIFT, PATTERN_MATCH_RESULT_SCALE_FACTOR

Constructor Summary

EAN13Reader()

Method Summary

protected int

decodeMiddle(BitArray row, int[] startRange, java.lang.StringBuffer resultString) Subclasses override this to decode the portion of a barcode between the start and end guard patterns.

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

decodeRow, decodeRow

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 Detail

EAN13Reader

public EAN13Reader()

Method Detail

decodeMiddle

protected int decodeMiddle(BitArray row,
                           int[] startRange,
                           java.lang.StringBuffer resultString)
                    throws NotFoundException

Description copied from class: UPCEANReader

Subclasses override this to decode the portion of a barcode between the start and end guard patterns.

Specified by:

decodeMiddle in class UPCEANReader

Parameters:

row - row of black/white values to search

startRange - start/end offset of start guard pattern

resultString - StringBuffer to append decoded chars to

Returns:

horizontal offset of first pixel after the "middle" that was decoded

Throws:

NotFoundException - if decoding could not complete successfully