/*

 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 0.7pre2 */

package com.sun.tools.example.debug.expr;

public class TokenMgrError extends Error

{

   /*

    * Ordinals for various reasons why an Error of this type can be thrown.

    */

    private static final long serialVersionUID = -6236440836177601522L;

   /**

    * Lexical error occurred.

    */

   static final int LEXICAL_ERROR = 0;

   /**

    * An attempt wass made to create a second instance of a static token manager.

    */

   static final int STATIC_LEXER_ERROR = 1;

   /**

    * Tried to change to an invalid lexical state.

    */

   static final int INVALID_LEXICAL_STATE = 2;

   /**

    * Detected (and bailed out of) an infinite loop in the token manager.

    */

   static final int LOOP_DETECTED = 3;

   /**

    * Indicates the reason why the exception is thrown. It will have

    * one of the above 4 values.

    */

   int errorCode;

   /**

    * Replaces unprintable characters by their espaced (or unicode escaped)

    * equivalents in the given string

    */

   protected static final String addEscapes(String str) {

      StringBuffer retval = new StringBuffer();

      char ch;

      for (int i = 0; i < str.length(); i++) {

        switch (str.charAt(i))

        {

           case 0 :

              continue;

           case '\b':

              retval.append("\\b");

              continue;

           case '\t':

              retval.append("\\t");

              continue;

           case '\n':

              retval.append("\\n");

              continue;

           case '\f':

              retval.append("\\f");

              continue;

           case '\r':

              retval.append("\\r");

              continue;

           case '\"':

              retval.append("\\\"");

              continue;

           case '\'':

              retval.append("\\\'");

              continue;

           case '\\':

              retval.append("\\\\");

              continue;

           default:

              if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {

                 String s = "0000" + Integer.toString(ch, 16);

                 retval.append("\\u" + s.substring(s.length() - 4, s.length()));

              } else {

                 retval.append(ch);

              }

              continue;

        }

      }

      return retval.toString();

   }

   /**

    * Returns a detailed message for the Error when it is thrown by the

    * token manager to indicate a lexical error.

    * Parameters :

    *    EOFSeen     : indicates if EOF caused the lexicl error

    *    curLexState : lexical state in which this error occurred

    *    errorLine   : line number when the error occurred

    *    errorColumn : column number when the error occurred

    *    errorAfter  : prefix that was seen before this error occurred

    *    curchar     : the offending character

    * Note: You can customize the lexical error message by modifying this method.

    */

   private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {

      return("Lexical error at line " +

           errorLine + ", column " +

           errorColumn + ".  Encountered: " +

           (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +

           "after : \"" + addEscapes(errorAfter) + "\"");

   }

   /**

    * You can also modify the body of this method to customize your error messages.

    * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not

    * of end-users concern, so you can return something like :

    *

    *     "Internal Error : Please file a bug report .... "

    *

    * from this method for such cases in the release version of your parser.

    */

   @Override

   public String getMessage() {

      return super.getMessage();

   }

   /*

    * Constructors of various flavors follow.

    */

   public TokenMgrError() {

   }

   public TokenMgrError(String message, int reason) {

      super(message);

      errorCode = reason;

   }

   public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {

      this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);

   }

}