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java.lang.Objectcom.google.zxing.oned.AbstractOneDReader
com.google.zxing.oned.AbstractUPCEANReader
public abstract class AbstractUPCEANReader
Encapsulates functionality and implementation that is common to UPC and EAN families of one-dimensional barcodes.
Constructor Summary | ||
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protected |
AbstractUPCEANReader()
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Method Summary | ||
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protected abstract int |
decodeMiddle(BitArray row,
int[] startRange,
StringBuffer resultString)
Subclasses override this to decode the portion of a barcode between the start and end guard patterns. |
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Result |
decodeRow(int rowNumber,
BitArray row,
int[] startGuardRange)
Like OneDReader.decodeRow(int, BitArray, java.util.Hashtable) , but
allows caller to inform method about where the UPC/EAN start pattern is
found. |
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Result |
decodeRow(int rowNumber,
BitArray row,
Hashtable hints)
Attempts to decode a one-dimensional barcode format given a single row of an image. |
Methods inherited from class com.google.zxing.oned.AbstractOneDReader |
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decode, decode |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.google.zxing.Reader |
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decode, decode |
Constructor Detail |
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protected AbstractUPCEANReader()
Method Detail |
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public final Result decodeRow(int rowNumber, BitArray row, Hashtable hints) throws ReaderException
OneDReader
Attempts to decode a one-dimensional barcode format given a single row of an image.
decodeRow
in interface OneDReader
decodeRow
in class AbstractOneDReader
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
ReaderException
- if an error occurs or barcode cannot be foundpublic final Result decodeRow(int rowNumber, BitArray row, int[] startGuardRange) throws ReaderException
UPCEANReader
Like OneDReader.decodeRow(int, BitArray, java.util.Hashtable)
, 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.
decodeRow
in interface UPCEANReader
ReaderException
protected abstract int decodeMiddle(BitArray row, int[] startRange, StringBuffer resultString) throws ReaderException
row
- row of black/white values to searchstartRange
- start/end offset of start guard patternresultString
- StringBuffer
to append decoded chars to
ReaderException
- if decoding could not complete successfully
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