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;
23 import com.google.zxing.ResultPoint;
25 import java.util.Hashtable;
28 * A reader which decodes UPC-A barcodes.
30 * @author dswitkin@google.com (Daniel Switkin)
32 public final class UPCReader implements Reader {
35 * Locates and decodes a UPC barcode in an image.
37 * @return a String representing the digits found
38 * @throws ReaderException if a barcode cannot be found or decoded
40 public Result decode(MonochromeBitmapSource image) throws ReaderException {
41 return decode(image, null);
44 public Result decode(MonochromeBitmapSource image, Hashtable hints)
45 throws ReaderException {
46 UPCDecoder decoder = new UPCDecoder(image);
47 String result = decoder.decode();
48 if (result == null || result.length() == 0) {
49 throw new ReaderException("No UPC barcode found");
51 return new Result(result, decoder.getPoints());