001/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 0.7pre2 */
002
003package jtb.cparser;
004
005public class TokenMgrError extends Error
006{
007  static final long serialVersionUID = 20050923L;
008
009   /*
010    * Ordinals for various reasons why an Error of this type can be thrown.
011    */
012
013   /**
014    * Lexical error occured.
015    */
016   static final int LEXICAL_ERROR = 0;
017
018   /**
019    * An attempt wass made to create a second instance of a static token manager.
020    */
021   static final int STATIC_LEXER_ERROR = 1;
022
023   /**
024    * Tried to change to an invalid lexical state.
025    */
026   static final int INVALID_LEXICAL_STATE = 2;
027
028   /**
029    * Detected (and bailed out of) an infinite loop in the token manager.
030    */
031   static final int LOOP_DETECTED = 3;
032
033   /**
034    * Indicates the reason why the exception is thrown. It will have
035    * one of the above 4 values.
036    */
037   int errorCode;
038
039   /**
040    * Replaces unprintable characters by their espaced (or unicode escaped)
041    * equivalents in the given string
042    */
043   protected static final String addEscapes(String str) {
044      StringBuffer retval = new StringBuffer();
045      char ch;
046      for (int i = 0; i < str.length(); i++) {
047        switch (str.charAt(i))
048        {
049           case 0 :
050              continue;
051           case '\b':
052              retval.append("\\b");
053              continue;
054           case '\t':
055              retval.append("\\t");
056              continue;
057           case '\n':
058              retval.append("\\n");
059              continue;
060           case '\f':
061              retval.append("\\f");
062              continue;
063           case '\r':
064              retval.append("\\r");
065              continue;
066           case '\"':
067              retval.append("\\\"");
068              continue;
069           case '\'':
070              retval.append("\\\'");
071              continue;
072           case '\\':
073              retval.append("\\\\");
074              continue;
075           default:
076              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
077                 String s = "0000" + Integer.toString(ch, 16);
078                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
079              } else {
080                 retval.append(ch);
081              }
082              continue;
083        }
084      }
085      return retval.toString();
086   }
087
088   /**
089    * Returns a detailed message for the Error when it is thrown by the
090    * token manager to indicate a lexical error.
091    * Parameters :
092    *    EOFSeen     : indicates if EOF caused the lexicl error
093    *    curLexState : lexical state in which this error occured
094    *    errorLine   : line number when the error occured
095    *    errorColumn : column number when the error occured
096    *    errorAfter  : prefix that was seen before this error occured
097    *    curchar     : the offending character
098    * Note: You can customize the lexical error message by modifying this method.
099    */
100   private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
101      return ("Lexical error at line " +
102              errorLine + ", column " +
103              errorColumn + ".  Encountered: " +
104              (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
105              "after : \"" + addEscapes(errorAfter) + "\"");
106   }
107
108   /**
109    * You can also modify the body of this method to customize your error messages.
110    * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
111    * of end-users concern, so you can return something like :
112    *
113    *     "Internal Error : Please file a bug report .... "
114    *
115    * from this method for such cases in the release version of your parser.
116    */
117   public String getMessage() {
118      return super.getMessage();
119   }
120
121   /*
122    * Constructors of various flavors follow.
123    */
124
125   public TokenMgrError() {
126   }
127
128   public TokenMgrError(String message, int reason) {
129      super(message);
130      errorCode = reason;
131   }
132
133   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
134      this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
135   }
136}