public override Result decodeRow(int rowNumber, BitArray row, System.Collections.Hashtable hints)
{
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = AbstractUPCEANReader.findStartGuardPattern(row);
int size = readers.Count;
for (int i = 0; i < size; i++)
{
UPCEANReader reader = (UPCEANReader)readers[i];
Result result;
try {
result = reader.decodeRow(rowNumber, row, startGuardPattern);
} 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.
if (result.getBarcodeFormat().Equals(BarcodeFormat.EAN_13) && result.getText()[0] == '0')
{
return(new Result(result.getText().Substring(1), null, result.getResultPoints(), BarcodeFormat.UPC_A));
}
return(result);
}
throw new ReaderException();
}
//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 bool[] encode(string contents)
{
if (contents.Length != 13)
{
throw new System.ArgumentException("Requested contents should be 13 digits long, but got " + contents.Length);
}
try
{
if (!UPCEANReader.checkStandardUPCEANChecksum(contents))
{
throw new System.ArgumentException("Contents do not pass checksum");
}
}
catch (FormatException fe)
{
throw new System.ArgumentException("Illegal contents");
}
int firstDigit = Convert.ToInt32(contents.Substring(0, 1));
int parities = EAN13Reader.FIRST_DIGIT_ENCODINGS[firstDigit];
bool[] result = new bool[CODE_WIDTH];
int pos = 0;
pos += appendPattern(result, pos, UPCEANReader.START_END_PATTERN, true);
// See {@link #EAN13Reader} for a description of how the first digit & left bars are encoded
for (int i = 1; i <= 6; i++)
{
int digit = Convert.ToInt32(contents.Substring(i, 1));
if ((parities >> (6 - i) & 1) == 1)
{
digit += 10;
}
pos += appendPattern(result, pos, UPCEANReader.L_AND_G_PATTERNS[digit], false);
}
pos += appendPattern(result, pos, UPCEANReader.MIDDLE_PATTERN, false);
for (int i = 7; i <= 12; i++)
{
int digit = Convert.ToInt32(contents.Substring(i, 1));
pos += appendPattern(result, pos, UPCEANReader.L_PATTERNS[digit], true);
}
pos += appendPattern(result, pos, UPCEANReader.START_END_PATTERN, true);
return(result);
}
