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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.
| Field Summary |
|---|
| Fields inherited from class com.google.zxing.oned.AbstractOneDReader |
|---|
INTEGER_MATH_SHIFT, PATTERN_MATCH_RESULT_SCALE_FACTOR |
| Constructor Summary | ||
|---|---|---|
protected |
AbstractUPCEANReader()
|
|
| 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 AbstractUPCEANReader.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,
int[] startGuardRange,
Hashtable hints)
Like AbstractUPCEANReader.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, patternMatchVariance, recordPattern, recordPatternInReverse |
| 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 Result decodeRow(int rowNumber,
BitArray row,
Hashtable hints)
throws NotFoundException,
ChecksumException,
FormatException
AbstractOneDReaderAttempts 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
NotFoundException - if an error occurs or barcode cannot be found
ChecksumException
FormatException
public Result decodeRow(int rowNumber,
BitArray row,
int[] startGuardRange)
throws NotFoundException,
ChecksumException,
FormatException
Like AbstractUPCEANReader.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 UPCEANReaderNotFoundException
ChecksumException
FormatException
public Result decodeRow(int rowNumber,
BitArray row,
int[] startGuardRange,
Hashtable hints)
throws NotFoundException,
ChecksumException,
FormatException
Like AbstractUPCEANReader.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.
NotFoundException
ChecksumException
FormatException
protected abstract int decodeMiddle(BitArray row,
int[] startRange,
StringBuffer resultString)
throws NotFoundException
row - row of black/white values to searchstartRange - start/end offset of start guard patternresultString - StringBuffer to append decoded chars to
NotFoundException - if decoding could not complete successfully
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