/**
* <p>A reader that can read all available UPC/EAN formats. If a caller wants to try to
- * read all such formats, it is most efficent to use this implementation rather than invoke
+ * read all such formats, it is most efficient to use this implementation rather than invoke
* individual readers.</p>
*
- * @author srowen@google.com (Sean Owen)
+ * @author Sean Owen
*/
public final class MultiFormatUPCEANReader extends AbstractOneDReader {
- public Result decodeRow(int rowNumber, BitArray row, Hashtable hints) throws ReaderException {
- Vector possibleFormats = hints == null ? null : (Vector) hints.get(DecodeHintType.POSSIBLE_FORMATS);
- Vector readers = new Vector();
+ private final Vector readers;
+
+ public MultiFormatUPCEANReader(Hashtable hints) {
+ Vector possibleFormats = hints == null ? null :
+ (Vector) hints.get(DecodeHintType.POSSIBLE_FORMATS);
+ readers = new Vector();
if (possibleFormats != null) {
if (possibleFormats.contains(BarcodeFormat.EAN_13)) {
readers.addElement(new EAN13Reader());
readers.addElement(new EAN8Reader());
readers.addElement(new UPCEReader());
}
+ }
+ public Result decodeRow(int rowNumber, BitArray row, Hashtable hints) throws ReaderException {
// Compute this location once and reuse it on multiple implementations
int[] startGuardPattern = AbstractUPCEANReader.findStartGuardPattern(row);
- for (int i = 0; i < readers.size(); i++) {
+ int size = readers.size();
+ for (int i = 0; i < size; i++) {
UPCEANReader reader = (UPCEANReader) readers.elementAt(i);
Result result;
try {
- result = reader.decodeRow(rowNumber, row, startGuardPattern);
+ result = reader.decodeRow(rowNumber, row, startGuardPattern, hints);
} catch (ReaderException re) {
continue;
}
// 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().charAt(0) == '0') {
- return new Result(result.getText().substring(1), null, result.getResultPoints(), BarcodeFormat.UPC_A);
+ if (result.getBarcodeFormat().equals(BarcodeFormat.EAN_13) &&
+ result.getText().charAt(0) == '0') {
+ return new Result(result.getText().substring(1), null, result.getResultPoints(),
+ BarcodeFormat.UPC_A);
}
return result;
}
- throw new ReaderException("No barcode was detected in this image.");
+ throw ReaderException.getInstance();
}
-}
\ No newline at end of file
+}