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java.lang.Objectcom.google.zxing.oned.OneDReader
com.google.zxing.oned.UPCEANReader
public abstract class UPCEANReader
Encapsulates functionality and implementation that is common to UPC and EAN families of one-dimensional barcodes.
Field Summary |
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Fields inherited from class com.google.zxing.oned.OneDReader |
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INTEGER_MATH_SHIFT, PATTERN_MATCH_RESULT_SCALE_FACTOR |
Constructor Summary | |
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protected |
UPCEANReader()
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Method Summary | |
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protected abstract int |
decodeMiddle(BitArray row,
int[] startRange,
java.lang.StringBuilder resultString)
Subclasses override this to decode the portion of a barcode between the start and end guard patterns. |
Result |
decodeRow(int rowNumber,
BitArray row,
int[] startGuardRange,
java.util.Map<DecodeHintType,?> hints)
Like decodeRow(int, BitArray, java.util.Map) , but
allows caller to inform method about where the UPC/EAN start pattern is
found. |
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. |
Methods inherited from class com.google.zxing.oned.OneDReader |
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decode, decode, patternMatchVariance, recordPattern, recordPatternInReverse, reset |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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protected UPCEANReader()
Method Detail |
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public Result decodeRow(int rowNumber, BitArray row, java.util.Map<DecodeHintType,?> hints) throws NotFoundException, ChecksumException, FormatException
OneDReader
Attempts to decode a one-dimensional barcode format given a single row of an image.
decodeRow
in class OneDReader
rowNumber
- row number from top of the rowrow
- the black/white pixel data of the rowhints
- decode hints
Result
containing encoded string and start/end of barcode
NotFoundException
- if an error occurs or barcode cannot be found
ChecksumException
FormatException
public Result decodeRow(int rowNumber, BitArray row, int[] startGuardRange, java.util.Map<DecodeHintType,?> hints) throws NotFoundException, ChecksumException, FormatException
Like decodeRow(int, BitArray, java.util.Map)
, but
allows caller to inform method about where the UPC/EAN start pattern is
found. This allows this to be computed once and reused across many implementations.
NotFoundException
ChecksumException
FormatException
protected abstract int decodeMiddle(BitArray row, int[] startRange, java.lang.StringBuilder resultString) throws NotFoundException
row
- row of black/white values to searchstartRange
- start/end offset of start guard patternresultString
- StringBuilder
to append decoded chars to
NotFoundException
- if decoding could not complete successfully
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