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/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/bsh/TokenMgrError.java

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Java | 133 lines | 102 code | 7 blank | 24 comment | 2 complexity | 4bb2c90cbea7d220185e2c958470f4e3 MD5 | raw file
  1/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
  2package org.gjt.sp.jedit.bsh;
  3
  4public class TokenMgrError extends Error
  5{
  6   /*
  7    * Ordinals for various reasons why an Error of this type can be thrown.
  8    */
  9
 10   /**
 11    * Lexical error occured.
 12    */
 13   static final int LEXICAL_ERROR = 0;
 14
 15   /**
 16    * An attempt wass made to create a second instance of a static token manager.
 17    */
 18   static final int STATIC_LEXER_ERROR = 1;
 19
 20   /**
 21    * Tried to change to an invalid lexical state.
 22    */
 23   static final int INVALID_LEXICAL_STATE = 2;
 24
 25   /**
 26    * Detected (and bailed out of) an infinite loop in the token manager.
 27    */
 28   static final int LOOP_DETECTED = 3;
 29
 30   /**
 31    * Indicates the reason why the exception is thrown. It will have
 32    * one of the above 4 values.
 33    */
 34   int errorCode;
 35
 36   /**
 37    * Replaces unprintable characters by their espaced (or unicode escaped)
 38    * equivalents in the given string
 39    */
 40   protected static final String addEscapes(String str) {
 41	  StringBuilder retval = new StringBuilder();
 42      char ch;
 43      for (int i = 0; i < str.length(); i++) {
 44        switch (str.charAt(i))
 45        {
 46           case 0 :
 47              continue;
 48           case '\b':
 49              retval.append("\\b");
 50              continue;
 51           case '\t':
 52              retval.append("\\t");
 53              continue;
 54           case '\n':
 55              retval.append("\\n");
 56              continue;
 57           case '\f':
 58              retval.append("\\f");
 59              continue;
 60           case '\r':
 61              retval.append("\\r");
 62              continue;
 63           case '\"':
 64              retval.append("\\\"");
 65              continue;
 66           case '\'':
 67              retval.append("\\\'");
 68              continue;
 69           case '\\':
 70              retval.append("\\\\");
 71              continue;
 72           default:
 73              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
 74                 String s = "0000" + Integer.toString(ch, 16);
 75                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
 76              } else {
 77                 retval.append(ch);
 78              }
 79              continue;
 80        }
 81      }
 82      return retval.toString();
 83   }
 84
 85   /**
 86    * Returns a detailed message for the Error when it is thrown by the
 87    * token manager to indicate a lexical error.
 88    * Parameters : 
 89    *    EOFSeen     : indicates if EOF caused the lexicl error
 90    *    curLexState : lexical state in which this error occured
 91    *    errorLine   : line number when the error occured
 92    *    errorColumn : column number when the error occured
 93    *    errorAfter  : prefix that was seen before this error occured
 94    *    curchar     : the offending character
 95    * Note: You can customize the lexical error message by modifying this method.
 96    */
 97   protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
 98      return("Lexical error at line " +
 99           errorLine + ", column " +
100           errorColumn + ".  Encountered: " +
101           (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
102           "after : \"" + addEscapes(errorAfter) + "\"");
103   }
104
105   /**
106    * You can also modify the body of this method to customize your error messages.
107    * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
108    * of end-users concern, so you can return something like : 
109    *
110    *     "Internal Error : Please file a bug report .... "
111    *
112    * from this method for such cases in the release version of your parser.
113    */
114   public String getMessage() {
115      return super.getMessage();
116   }
117
118   /*
119    * Constructors of various flavors follow.
120    */
121
122   public TokenMgrError() {
123   }
124
125   public TokenMgrError(String message, int reason) {
126      super(message);
127      errorCode = reason;
128   }
129
130   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
131      this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
132   }
133}