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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 | ||
|---|---|---|
protected |
AbstractUPCEANReader()
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| Method Summary | ||
|---|---|---|
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. |
|
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. |
|
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 |
|---|
decode, decode |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface com.google.zxing.Reader |
|---|
decode, decode |
| Constructor Detail |
|---|
protected AbstractUPCEANReader()
| Method Detail |
|---|
public final Result decodeRow(int rowNumber,
BitArray row,
Hashtable hints)
throws ReaderException
OneDReaderAttempts to decode a one-dimensional barcode format given a single row of an image.
decodeRow in interface OneDReaderdecodeRow in class AbstractOneDReaderrowNumber - 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 found
public final Result decodeRow(int rowNumber,
BitArray row,
int[] startGuardRange)
throws ReaderException
UPCEANReaderLike 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 UPCEANReaderReaderException
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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