csharp/oned/UPCAReader.cs

   1 /*\r
   2 * Copyright 2008 ZXing authors\r
   3 *\r
   4 * Licensed under the Apache License, Version 2.0 (the "License");\r
   5 * you may not use this file except in compliance with the License.\r
   6 * You may obtain a copy of the License at\r
   7 *\r
   8 *      http://www.apache.org/licenses/LICENSE-2.0\r
   9 *\r
  10 * Unless required by applicable law or agreed to in writing, software\r
  11 * distributed under the License is distributed on an "AS IS" BASIS,\r
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 * See the License for the specific language governing permissions and\r
  14 * limitations under the License.\r
  15 */\r
  16 using System;\r
  17 using BarcodeFormat = com.google.zxing.BarcodeFormat;\r
  18 using ReaderException = com.google.zxing.ReaderException;\r
  19 using Result = com.google.zxing.Result;\r
  20 using BinaryBitmap = com.google.zxing.BinaryBitmap;\r
  21 using BitArray = com.google.zxing.common.BitArray;\r
  22 namespace com.google.zxing.oned\r
  23 {\r
  24         \r
  25         /// <summary> <p>Implements decoding of the UPC-A format.</p>\r
  26         /// \r
  27         /// </summary>\r
  28         /// <author>  dswitkin@google.com (Daniel Switkin)\r
  29         /// </author>\r
  30         /// <author>  Sean Owen\r
  31         /// </author>\r
  32         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  33         /// </author>\r
  34         public sealed class UPCAReader:UPCEANReader\r
  35         {\r
  36                 override internal BarcodeFormat BarcodeFormat\r
  37                 {\r
  38                         get\r
  39                         {\r
  40                                 return BarcodeFormat.UPC_A;\r
  41                         }\r
  42                         \r
  43                 }\r
  44                 \r
  45                 //UPGRADE_NOTE: Final was removed from the declaration of 'ean13Reader '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  46                 private UPCEANReader ean13Reader = new EAN13Reader();\r
  47                 \r
  48                 public override Result decodeRow(int rowNumber, BitArray row, int[] startGuardRange, System.Collections.Hashtable hints)\r
  49                 {\r
  50                         return maybeReturnResult(ean13Reader.decodeRow(rowNumber, row, startGuardRange, hints));\r
  51                 }\r
  52                 \r
  53                 public override Result decodeRow(int rowNumber, BitArray row, System.Collections.Hashtable hints)\r
  54                 {\r
  55                         return maybeReturnResult(ean13Reader.decodeRow(rowNumber, row, hints));\r
  56                 }\r
  57                 \r
  58                 public override Result decode(BinaryBitmap image)\r
  59                 {\r
  60                         return maybeReturnResult(ean13Reader.decode(image));\r
  61                 }\r
  62                 \r
  63                 public override Result decode(BinaryBitmap image, System.Collections.Hashtable hints)\r
  64                 {\r
  65                         return maybeReturnResult(ean13Reader.decode(image, hints));\r
  66                 }\r
  67                 \r
  68                 protected internal override int decodeMiddle(BitArray row, int[] startRange, System.Text.StringBuilder resultString)\r
  69                 {\r
  70                         return ean13Reader.decodeMiddle(row, startRange, resultString);\r
  71                 }\r
  72                 \r
  73                 private static Result maybeReturnResult(Result result)\r
  74                 {\r
  75                         System.String text = result.Text;\r
  76                         if (text[0] == '0')\r
  77                         {\r
  78                                 return new Result(text.Substring(1), null, result.ResultPoints, BarcodeFormat.UPC_A);\r
  79                         }\r
  80                         else\r
  81                         {\r
  82                                 throw ReaderException.Instance;\r
  83                         }\r
  84                 }\r
  85         }\r
  86 }