content: package alchemystar.engine.net.proto.util;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * @author lizhuyang
   */
  public class CharsetUtil {
      private static final String[] INDEX_TO_CHARSET = new String[99];
      private static final Map<String, Integer> CHARSET_TO_INDEX = new HashMap<String, Integer>();
      static {
          // index --> charset
          INDEX_TO_CHARSET[1] = "big5";
          INDEX_TO_CHARSET[2] = "czech";
          INDEX_TO_CHARSET[3] = "dec8";
          INDEX_TO_CHARSET[4] = "dos";
          INDEX_TO_CHARSET[5] = "german1";
          INDEX_TO_CHARSET[6] = "hp8";
          INDEX_TO_CHARSET[7] = "koi8_ru";
          INDEX_TO_CHARSET[8] = "latin1";
          INDEX_TO_CHARSET[9] = "latin2";
          INDEX_TO_CHARSET[10] = "swe7";
          INDEX_TO_CHARSET[11] = "usa7";
          INDEX_TO_CHARSET[12] = "ujis";
          INDEX_TO_CHARSET[13] = "sjis";
          INDEX_TO_CHARSET[14] = "cp1251";
          INDEX_TO_CHARSET[15] = "danish";
          INDEX_TO_CHARSET[16] = "hebrew";
          INDEX_TO_CHARSET[18] = "tis620";
          INDEX_TO_CHARSET[19] = "euc_kr";
          INDEX_TO_CHARSET[20] = "estonia";
          INDEX_TO_CHARSET[21] = "hungarian";
          INDEX_TO_CHARSET[22] = "koi8_ukr";
          INDEX_TO_CHARSET[23] = "win1251ukr";
          INDEX_TO_CHARSET[24] = "gb2312";
          INDEX_TO_CHARSET[25] = "greek";
          INDEX_TO_CHARSET[26] = "win1250";
          INDEX_TO_CHARSET[27] = "croat";
          INDEX_TO_CHARSET[28] = "gbk";
          INDEX_TO_CHARSET[29] = "cp1257";
          INDEX_TO_CHARSET[30] = "latin5";
          INDEX_TO_CHARSET[31] = "latin1_de";
          INDEX_TO_CHARSET[32] = "armscii8";
          INDEX_TO_CHARSET[33] = "utf8";
          INDEX_TO_CHARSET[34] = "win1250ch";
          INDEX_TO_CHARSET[35] = "ucs2";
          INDEX_TO_CHARSET[36] = "cp866";
          INDEX_TO_CHARSET[37] = "keybcs2";
          INDEX_TO_CHARSET[38] = "macce";
          INDEX_TO_CHARSET[39] = "macroman";
          INDEX_TO_CHARSET[40] = "pclatin2";
          INDEX_TO_CHARSET[41] = "latvian";
          INDEX_TO_CHARSET[42] = "latvian1";
          INDEX_TO_CHARSET[43] = "maccebin";
          INDEX_TO_CHARSET[44] = "macceciai";
          INDEX_TO_CHARSET[45] = "maccecias";
          INDEX_TO_CHARSET[46] = "maccecsas";
          INDEX_TO_CHARSET[47] = "latin1bin";
          INDEX_TO_CHARSET[48] = "latin1cias";
          INDEX_TO_CHARSET[49] = "latin1csas";
          INDEX_TO_CHARSET[50] = "cp1251bin";
          INDEX_TO_CHARSET[51] = "cp1251cias";
          INDEX_TO_CHARSET[52] = "cp1251csas";
          INDEX_TO_CHARSET[53] = "macromanbin";
          INDEX_TO_CHARSET[54] = "macromancias";
          INDEX_TO_CHARSET[55] = "macromanciai";
          INDEX_TO_CHARSET[56] = "macromancsas";
          INDEX_TO_CHARSET[57] = "cp1256";
          INDEX_TO_CHARSET[63] = "binary";
          INDEX_TO_CHARSET[64] = "armscii";
          INDEX_TO_CHARSET[65] = "ascii";
          INDEX_TO_CHARSET[66] = "cp1250";
          INDEX_TO_CHARSET[67] = "cp1256";
          INDEX_TO_CHARSET[68] = "cp866";
          INDEX_TO_CHARSET[69] = "dec8";
          INDEX_TO_CHARSET[70] = "greek";
          INDEX_TO_CHARSET[71] = "hebrew";
          INDEX_TO_CHARSET[72] = "hp8";
          INDEX_TO_CHARSET[73] = "keybcs2";
          INDEX_TO_CHARSET[74] = "koi8r";
          INDEX_TO_CHARSET[75] = "koi8ukr";
          INDEX_TO_CHARSET[77] = "latin2";
          INDEX_TO_CHARSET[78] = "latin5";
          INDEX_TO_CHARSET[79] = "latin7";
          INDEX_TO_CHARSET[80] = "cp850";
          INDEX_TO_CHARSET[81] = "cp852";
          INDEX_TO_CHARSET[82] = "swe7";
          INDEX_TO_CHARSET[83] = "utf8";
          INDEX_TO_CHARSET[84] = "big5";
          INDEX_TO_CHARSET[85] = "euckr";
          INDEX_TO_CHARSET[86] = "gb2312";
          INDEX_TO_CHARSET[87] = "gbk";
          INDEX_TO_CHARSET[88] = "sjis";
          INDEX_TO_CHARSET[89] = "tis620";
          INDEX_TO_CHARSET[90] = "ucs2";
          INDEX_TO_CHARSET[91] = "ujis";
          INDEX_TO_CHARSET[92] = "geostd8";
          INDEX_TO_CHARSET[93] = "geostd8";
          INDEX_TO_CHARSET[94] = "latin1";
          INDEX_TO_CHARSET[95] = "cp932";
          INDEX_TO_CHARSET[96] = "cp932";
          INDEX_TO_CHARSET[97] = "eucjpms";
          INDEX_TO_CHARSET[98] = "eucjpms";
  
          // charset --> index
          for (int i = 0; i < INDEX_TO_CHARSET.length; i++) {
              String charset = INDEX_TO_CHARSET[i];
              if (charset != null && CHARSET_TO_INDEX.get(charset) == null) {
                  CHARSET_TO_INDEX.put(charset, i);
              }
          }
          CHARSET_TO_INDEX.put("iso-8859-1", 14);
          CHARSET_TO_INDEX.put("iso_8859_1", 14);
          CHARSET_TO_INDEX.put("utf-8", 33);
      }
  
      public static final String getCharset(int index) {
          return INDEX_TO_CHARSET[index];
      }
  
      public static final int getIndex(String charset) {
          if (charset == null || charset.length() == 0) {
              return 0;
          } else {
              Integer i = CHARSET_TO_INDEX.get(charset.toLowerCase());
              return (i == null) ? 0 : i.intValue();
          }
      }
  
  }
  