csharp/oned/MultiFormatOneDReader.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 DecodeHintType = com.google.zxing.DecodeHintType;\r
  19 using ReaderException = com.google.zxing.ReaderException;\r
  20 using Result = com.google.zxing.Result;\r
  21 using BitArray = com.google.zxing.common.BitArray;\r
  22 namespace com.google.zxing.oned\r
  23 {\r
  24         \r
  25         /// <author>  dswitkin@google.com (Daniel Switkin)\r
  26         /// </author>\r
  27         /// <author>  Sean Owen\r
  28         /// </author>\r
  29         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  30         /// </author>\r
  31         public sealed class MultiFormatOneDReader:OneDReader\r
  32         {\r
  33                 \r
  34                 //UPGRADE_NOTE: Final was removed from the declaration of 'readers '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  35                 private System.Collections.ArrayList readers;\r
  36                 \r
  37                 public MultiFormatOneDReader(System.Collections.Hashtable hints)\r
  38                 {\r
  39                         System.Collections.ArrayList possibleFormats = hints == null?null:(System.Collections.ArrayList) hints[DecodeHintType.POSSIBLE_FORMATS];\r
  40                         bool useCode39CheckDigit = hints != null && hints[DecodeHintType.ASSUME_CODE_39_CHECK_DIGIT] != null;\r
  41                         readers = System.Collections.ArrayList.Synchronized(new System.Collections.ArrayList(10));\r
  42                         if (possibleFormats != null)\r
  43                         {\r
  44                                 if (possibleFormats.Contains(BarcodeFormat.EAN_13) || possibleFormats.Contains(BarcodeFormat.UPC_A) || possibleFormats.Contains(BarcodeFormat.EAN_8) || possibleFormats.Contains(BarcodeFormat.UPC_E))\r
  45                                 {\r
  46                                         readers.Add(new MultiFormatUPCEANReader(hints));\r
  47                                 }\r
  48                                 if (possibleFormats.Contains(BarcodeFormat.CODE_39))\r
  49                                 {\r
  50                                         readers.Add(new Code39Reader(useCode39CheckDigit));\r
  51                                 }\r
  52                                 if (possibleFormats.Contains(BarcodeFormat.CODE_128))\r
  53                                 {\r
  54                                         readers.Add(new Code128Reader());\r
  55                                 }\r
  56                                 if (possibleFormats.Contains(BarcodeFormat.ITF))\r
  57                                 {\r
  58                                         readers.Add(new ITFReader());\r
  59                                 }\r
  60                         }\r
  61                         if ((readers.Count == 0))\r
  62                         {\r
  63                                 readers.Add(new MultiFormatUPCEANReader(hints));\r
  64                                 readers.Add(new Code39Reader());\r
  65                                 readers.Add(new Code128Reader());\r
  66                                 readers.Add(new ITFReader());\r
  67                         }\r
  68                 }\r
  69                 \r
  70                 public override Result decodeRow(int rowNumber, BitArray row, System.Collections.Hashtable hints)\r
  71                 {\r
  72                         int size = readers.Count;\r
  73                         for (int i = 0; i < size; i++)\r
  74                         {\r
  75                                 OneDReader reader = (OneDReader) readers[i];\r
  76                                 try\r
  77                                 {\r
  78                                         return reader.decodeRow(rowNumber, row, hints);\r
  79                                 }\r
  80                                 catch (ReaderException re)\r
  81                                 {\r
  82                                         // continue\r
  83                                 }\r
  84                         }\r
  85                         \r
  86                         throw ReaderException.Instance;\r
  87                 }\r
  88         }\r
  89 }