csharp/common/CharacterSetECI.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 namespace com.google.zxing.common\r
  18 {\r
  19         \r
  20         /// <summary> Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1\r
  21         /// of ISO 18004.\r
  22         /// \r
  23         /// </summary>\r
  24         /// <author>  Sean Owen\r
  25         /// </author>\r
  26         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  27         /// </author>\r
  28         public sealed class CharacterSetECI:ECI\r
  29         {\r
  30                 public System.String EncodingName\r
  31                 {\r
  32                         get\r
  33                         {\r
  34                                 return encodingName;\r
  35                         }\r
  36                         \r
  37                 }\r
  38                 \r
  39                 private static System.Collections.Hashtable VALUE_TO_ECI;\r
  40                 private static System.Collections.Hashtable NAME_TO_ECI;\r
  41                 \r
  42                 private static void  initialize()\r
  43                 {\r
  44                         VALUE_TO_ECI = System.Collections.Hashtable.Synchronized(new System.Collections.Hashtable(29));\r
  45                         NAME_TO_ECI = System.Collections.Hashtable.Synchronized(new System.Collections.Hashtable(29));\r
  46                         // TODO figure out if these values are even right!\r
  47                         addCharacterSet(0, "Cp437");\r
  48                         addCharacterSet(1, new System.String[]{"ISO8859_1", "ISO-8859-1"});\r
  49                         addCharacterSet(2, "Cp437");\r
  50                         addCharacterSet(3, new System.String[]{"ISO8859_1", "ISO-8859-1"});\r
  51                         addCharacterSet(4, "ISO8859_2");\r
  52                         addCharacterSet(5, "ISO8859_3");\r
  53                         addCharacterSet(6, "ISO8859_4");\r
  54                         addCharacterSet(7, "ISO8859_5");\r
  55                         addCharacterSet(8, "ISO8859_6");\r
  56                         addCharacterSet(9, "ISO8859_7");\r
  57                         addCharacterSet(10, "ISO8859_8");\r
  58                         addCharacterSet(11, "ISO8859_9");\r
  59                         addCharacterSet(12, "ISO8859_10");\r
  60                         addCharacterSet(13, "ISO8859_11");\r
  61                         addCharacterSet(15, "ISO8859_13");\r
  62                         addCharacterSet(16, "ISO8859_14");\r
  63                         addCharacterSet(17, "ISO8859_15");\r
  64                         addCharacterSet(18, "ISO8859_16");\r
  65                         addCharacterSet(20, new System.String[]{"SJIS", "Shift_JIS"});\r
  66                 }\r
  67                 \r
  68                 //UPGRADE_NOTE: Final was removed from the declaration of 'encodingName '. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1003'"\r
  69                 private System.String encodingName;\r
  70                 \r
  71                 private CharacterSetECI(int value_Renamed, System.String encodingName):base(value_Renamed)\r
  72                 {\r
  73                         this.encodingName = encodingName;\r
  74                 }\r
  75                 \r
  76                 private static void  addCharacterSet(int value_Renamed, System.String encodingName)\r
  77                 {\r
  78                         CharacterSetECI eci = new CharacterSetECI(value_Renamed, encodingName);\r
  79                         VALUE_TO_ECI[(System.Int32) value_Renamed] = eci; // can't use valueOf\r
  80                         NAME_TO_ECI[encodingName] = eci;\r
  81                 }\r
  82                 \r
  83                 private static void  addCharacterSet(int value_Renamed, System.String[] encodingNames)\r
  84                 {\r
  85                         CharacterSetECI eci = new CharacterSetECI(value_Renamed, encodingNames[0]);\r
  86                         VALUE_TO_ECI[(System.Int32) value_Renamed] = eci; // can't use valueOf\r
  87                         for (int i = 0; i < encodingNames.Length; i++)\r
  88                         {\r
  89                                 NAME_TO_ECI[encodingNames[i]] = eci;\r
  90                         }\r
  91                 }\r
  92                 \r
  93                 /// <param name="value">character set ECI value\r
  94                 /// </param>\r
  95                 /// <returns> {@link CharacterSetECI} representing ECI of given value, or null if it is legal but\r
  96                 /// unsupported\r
  97                 /// </returns>\r
  98                 /// <throws>  IllegalArgumentException if ECI value is invalid </throws>\r
  99                 public static CharacterSetECI getCharacterSetECIByValue(int value_Renamed)\r
 100                 {\r
 101                         if (VALUE_TO_ECI == null)\r
 102                         {\r
 103                                 initialize();\r
 104                         }\r
 105                         if (value_Renamed < 0 || value_Renamed >= 900)\r
 106                         {\r
 107                                 throw new System.ArgumentException("Bad ECI value: " + value_Renamed);\r
 108                         }\r
 109                         return (CharacterSetECI) VALUE_TO_ECI[(System.Int32) value_Renamed];\r
 110                 }\r
 111                 \r
 112                 /// <param name="name">character set ECI encoding name\r
 113                 /// </param>\r
 114                 /// <returns> {@link CharacterSetECI} representing ECI for character encoding, or null if it is legal\r
 115                 /// but unsupported\r
 116                 /// </returns>\r
 117                 public static CharacterSetECI getCharacterSetECIByName(System.String name)\r
 118                 {\r
 119                         if (NAME_TO_ECI == null)\r
 120                         {\r
 121                                 initialize();\r
 122                         }\r
 123                         return (CharacterSetECI) NAME_TO_ECI[name];\r
 124                 }\r
 125         }\r
 126 }