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Chuck Tomanek convert 15 character ID Strings to 18 chars

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  1. // http://www.sundog.net/sunblog/posts/a-handy-method-for-converting-15-character-id-strings-in-salesforce-to-18-c/
  2.  
  3. public string generate18CharId(string id){
  4.  
  5. // This method will take a 15 character ID and return its 18 character ID:
  6.  
  7.      if (id == null){ 
  8.           return null;
  9.      }
  10.      if (id.length() != 15) {
  11.           return null;
  12.      }
  13.      string suffix = '';
  14.      integer flags;
  15.  
  16.      for (integer i = 0; i < 3; i++) {
  17.           flags = 0;
  18.           for (integer j = 0; j < 5; j++) {
  19.                string c = id.substring(i * 5 + j,i * 5 + j + 1);
  20.                //Only add to flags if c is an uppercase letter:
  21.                if (c.toUpperCase().equals(c) && c >= 'A' && c <= 'Z') {
  22.                     flags = flags + (1 << j);
  23.                }
  24.           }
  25.           if (flags <= 25) {
  26.                suffix = suffix + 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.substring(flags,flags+1);
  27.           }else{
  28.                suffix = suffix + '012345'.substring(flags-25,flags-24);
  29.           }
  30.      }
  31.      return id + suffix;
  32. }

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