2 * Copyright 2007 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.upc;
19 import com.google.zxing.MonochromeBitmapSource;
20 import com.google.zxing.Reader;
21 import com.google.zxing.ReaderException;
22 import com.google.zxing.Result;
24 import java.util.Hashtable;
27 * A reader which decodes UPC-A barcodes.
29 * @author dswitkin@google.com (Daniel Switkin)
31 public final class UPCReader implements Reader {
34 * Locates and decodes a UPC barcode in an image.
36 * @return a String representing the digits found
37 * @throws ReaderException if a barcode cannot be found or decoded
39 public Result decode(MonochromeBitmapSource image) throws ReaderException {
40 return decode(image, null);
43 public Result decode(MonochromeBitmapSource image, Hashtable hints)
44 throws ReaderException {
45 UPCDecoder decoder = new UPCDecoder(image);
46 String result = decoder.decode();
47 if (result == null || result.length() == 0) {
48 throw new ReaderException("No UPC barcode found");
50 return new Result(result, decoder.getPoints());