001/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
002/**
003 *
004 * Licensed to the Apache Software Foundation (ASF) under one or more
005 * contributor license agreements.  See the NOTICE file distributed with
006 * this work for additional information regarding copyright ownership.
007 * The ASF licenses this file to You under the Apache License, Version 2.0
008 * (the "License"); you may not use this file except in compliance with
009 * the License.  You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020package org.granite.gravity.selector;
021
022public class TokenMgrError extends Error
023{
024    private static final long serialVersionUID = 1L;
025
026   /*
027    * Ordinals for various reasons why an Error of this type can be thrown.
028    */
029
030/**
031    * Lexical error occured.
032    */
033   static final int LEXICAL_ERROR = 0;
034
035   /**
036    * An attempt wass made to create a second instance of a static token manager.
037    */
038   static final int STATIC_LEXER_ERROR = 1;
039
040   /**
041    * Tried to change to an invalid lexical state.
042    */
043   static final int INVALID_LEXICAL_STATE = 2;
044
045   /**
046    * Detected (and bailed out of) an infinite loop in the token manager.
047    */
048   static final int LOOP_DETECTED = 3;
049
050   /**
051    * Indicates the reason why the exception is thrown. It will have
052    * one of the above 4 values.
053    */
054   int errorCode;
055
056   /**
057    * Replaces unprintable characters by their espaced (or unicode escaped)
058    * equivalents in the given string
059    */
060   protected static final String addEscapes(String str) {
061      StringBuffer retval = new StringBuffer();
062      char ch;
063      for (int i = 0; i < str.length(); i++) {
064        switch (str.charAt(i))
065        {
066           case 0 :
067              continue;
068           case '\b':
069              retval.append("\\b");
070              continue;
071           case '\t':
072              retval.append("\\t");
073              continue;
074           case '\n':
075              retval.append("\\n");
076              continue;
077           case '\f':
078              retval.append("\\f");
079              continue;
080           case '\r':
081              retval.append("\\r");
082              continue;
083           case '\"':
084              retval.append("\\\"");
085              continue;
086           case '\'':
087              retval.append("\\\'");
088              continue;
089           case '\\':
090              retval.append("\\\\");
091              continue;
092           default:
093              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
094                 String s = "0000" + Integer.toString(ch, 16);
095                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
096              } else {
097                 retval.append(ch);
098              }
099              continue;
100        }
101      }
102      return retval.toString();
103   }
104
105   /**
106    * Returns a detailed message for the Error when it is thrown by the
107    * token manager to indicate a lexical error.
108    * Parameters :
109    *    EOFSeen     : indicates if EOF caused the lexicl error
110    *    curLexState : lexical state in which this error occured
111    *    errorLine   : line number when the error occured
112    *    errorColumn : column number when the error occured
113    *    errorAfter  : prefix that was seen before this error occured
114    *    curchar     : the offending character
115    * Note: You can customize the lexical error message by modifying this method.
116    */
117   protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
118      return("Lexical error at line " +
119           errorLine + ", column " +
120           errorColumn + ".  Encountered: " +
121           (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
122           "after : \"" + addEscapes(errorAfter) + "\"");
123   }
124
125   /**
126    * You can also modify the body of this method to customize your error messages.
127    * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
128    * of end-users concern, so you can return something like :
129    *
130    *     "Internal Error : Please file a bug report .... "
131    *
132    * from this method for such cases in the release version of your parser.
133    */
134   @Override
135   public String getMessage() {
136      return super.getMessage();
137   }
138
139   /*
140    * Constructors of various flavors follow.
141    */
142
143   public TokenMgrError() {
144   }
145
146   public TokenMgrError(String message, int reason) {
147      super(message);
148      errorCode = reason;
149   }
150
151   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
152      this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
153   }
154}