//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public com.google.zxing.Result decodeRow(int rowNumber, com.google.zxing.common.BitArray row, java.util.Map<com.google.zxing.DecodeHintType,?> hints) throws com.google.zxing.NotFoundException
public override Result decodeRow(int rowNumber, BitArray row, IDictionary <DecodeHintType, object> hints)
{
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
foreach (UPCEANReader reader in readers)
{
Result result;
try
{
result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
}
catch (ReaderException re)
{
continue;
}
// Special case: a 12-digit code encoded in UPC-A is identical to a "0"
// followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
// UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
// Individually these are correct and their readers will both read such a code
// and correctly call it EAN-13, or UPC-A, respectively.
//
// In this case, if we've been looking for both types, we'd like to call it
// a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
// UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
// result if appropriate.
//
// But, don't return UPC-A if UPC-A was not a requested format!
bool ean13MayBeUPCA = result.BarcodeFormat == BarcodeFormat.EAN_13 && result.Text[0] == '0';
//ICollection<BarcodeFormat> possibleFormats = hints == null ? null : (ICollection<BarcodeFormat>) hints[DecodeHintType.POSSIBLE_FORMATS];
ICollection <BarcodeFormat> possibleFormats = null;
if (hints != null && hints.ContainsKey(DecodeHintType.POSSIBLE_FORMATS))
{
possibleFormats = (ICollection <BarcodeFormat>)hints[DecodeHintType.POSSIBLE_FORMATS];
}
bool canReturnUPCA = possibleFormats == null || possibleFormats.Contains(BarcodeFormat.UPC_A);
if (ean13MayBeUPCA && canReturnUPCA)
{
// Transfer the metdata across
Result resultUPCA = new Result(result.Text.Substring(1), result.RawBytes, result.ResultPoints, BarcodeFormat.UPC_A);
resultUPCA.putAllMetadata(result.ResultMetadata);
return(resultUPCA);
}
return(result);
}
throw NotFoundException.NotFoundInstance;
}
public override Result decodeRow(int rowNumber, BitArray row, System.Collections.Hashtable hints)
{
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = UPCEANReader.findStartGuardPattern(row);
if (startGuardPattern.IsBlank())
{
return(null);
}
int size = readers.Count;
for (int i = 0; i < size; i++)
{
UPCEANReader reader = (UPCEANReader)readers[i];
Result result;
result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
// Special case: a 12-digit code encoded in UPC-A is identical to a "0"
// followed by those 12 digits encoded as EAN-13. Each will recognize such a code,
// UPC-A as a 12-digit string and EAN-13 as a 13-digit string starting with "0".
// Individually these are correct and their readers will both read such a code
// and correctly call it EAN-13, or UPC-A, respectively.
//
// In this case, if we've been looking for both types, we'd like to call it
// a UPC-A code. But for efficiency we only run the EAN-13 decoder to also read
// UPC-A. So we special case it here, and convert an EAN-13 result to a UPC-A
// result if appropriate.
if (result.HasValue())
{
if (result.BarcodeFormat.Equals(BarcodeFormat.EAN_13) && result.Text[0] == '0')
{
return(new Result(result.Text.Substring(1), null, result.ResultPoints, BarcodeFormat.UPC_A));
}
return(result);
}
}
return(null);
}
