csharp/client/result/ISBNResultParser.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 Result = com.google.zxing.Result;\r
  19 namespace com.google.zxing.client.result\r
  20 {\r
  21         \r
  22         /// <summary> Parses strings of digits that represent a ISBN.\r
  23         /// \r
  24         /// </summary>\r
  25         /// <author>  jbreiden@google.com (Jeff Breidenbach)\r
  26         /// </author>\r
  27         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  28         /// </author>\r
  29         public class ISBNResultParser:ResultParser\r
  30         {\r
  31                 \r
  32                 private ISBNResultParser()\r
  33                 {\r
  34                 }\r
  35                 \r
  36                 // ISBN-13 For Dummies \r
  37                 // http://www.bisg.org/isbn-13/for.dummies.html\r
  38                 public static ISBNParsedResult parse(Result result)\r
  39                 {\r
  40                         BarcodeFormat format = result.BarcodeFormat;\r
  41                         if (!BarcodeFormat.EAN_13.Equals(format))\r
  42                         {\r
  43                                 return null;\r
  44                         }\r
  45                         System.String rawText = result.Text;\r
  46                         if (rawText == null)\r
  47                         {\r
  48                                 return null;\r
  49                         }\r
  50                         int length = rawText.Length;\r
  51                         if (length != 13)\r
  52                         {\r
  53                                 return null;\r
  54                         }\r
  55                         if (!rawText.StartsWith("978") && !rawText.StartsWith("979"))\r
  56                         {\r
  57                                 return null;\r
  58                         }\r
  59                         \r
  60                         return new ISBNParsedResult(rawText);\r
  61                 }\r
  62         }\r
  63 }