2 * Copyright 2008 Google Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.oned;
19 import com.google.zxing.DecodeHintType;
20 import com.google.zxing.ReaderException;
21 import com.google.zxing.Result;
22 import com.google.zxing.BarcodeFormat;
23 import com.google.zxing.common.BitArray;
25 import java.util.Hashtable;
26 import java.util.Vector;
29 * @author dswitkin@google.com (Daniel Switkin)
30 * @author srowen@google.com (Sean Owen)
32 public final class MultiFormatOneDReader extends AbstractOneDReader {
34 public Result decodeRow(int rowNumber, BitArray row, Hashtable hints) throws ReaderException {
36 Hashtable possibleFormats = hints == null ? null : (Hashtable) hints.get(DecodeHintType.POSSIBLE_FORMATS);
37 Vector readers = new Vector();
38 if (possibleFormats != null) {
39 if (possibleFormats.contains(BarcodeFormat.EAN_13) ||
40 possibleFormats.contains(BarcodeFormat.UPC_A) ||
41 possibleFormats.contains(BarcodeFormat.EAN_8) ||
42 possibleFormats.contains(BarcodeFormat.UPC_E)) {
43 readers.addElement(new MultiFormatUPCEANReader());
45 if (possibleFormats.contains(BarcodeFormat.CODE_39)) {
46 readers.addElement(new Code39Reader());
48 if (possibleFormats.contains(BarcodeFormat.CODE_128)) {
49 readers.addElement(new Code128Reader());
52 if (readers.isEmpty()) {
53 readers.addElement(new MultiFormatUPCEANReader());
54 readers.addElement(new Code39Reader());
55 readers.addElement(new Code128Reader());
58 for (int i = 0; i < readers.size(); i++) {
59 OneDReader reader = (OneDReader) readers.elementAt(i);
61 return reader.decodeRow(rowNumber, row, hints);
62 } catch (ReaderException re) {
67 throw new ReaderException("No barcode was detected in this image.");