com.google.zxing.oned
Class UPCEReader

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

All Implemented Interfaces:

Reader

public final class UPCEReader
extends UPCEANReader

Implements decoding of the UPC-E format.

This is a great reference for UPC-E information.

Author:

Sean Owen

Field Summary

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

INTEGER_MATH_SHIFT, PATTERN_MATCH_RESULT_SCALE_FACTOR

Constructor Summary

UPCEReader()

Method Summary

protected boolean	checkChecksum(String s)
static String	convertUPCEtoUPCA(String upce) Expands a UPC-E value back into its full, equivalent UPC-A code value.
protected int[]	decodeEnd(BitArray row, int endStart)
protected int	decodeMiddle(BitArray row, int[] startRange, StringBuilder result) 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

UPCEReader

public UPCEReader()

Method Detail

decodeMiddle

protected int decodeMiddle(BitArray row,
                           int[] startRange,
                           StringBuilder result)
                    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

result - StringBuilder 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

decodeEnd

protected int[] decodeEnd(BitArray row,
                          int endStart)
                   throws NotFoundException

Throws:

NotFoundException

checkChecksum

protected boolean checkChecksum(String s)
                         throws FormatException,
                                ChecksumException

Returns:

UPCEANReader.checkStandardUPCEANChecksum(CharSequence)

Throws:

FormatException

ChecksumException

convertUPCEtoUPCA

public static String convertUPCEtoUPCA(String upce)

Expands a UPC-E value back into its full, equivalent UPC-A code value.

Parameters:

upce - UPC-E code as string of digits

Returns:

equivalent UPC-A code as string of digits