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    1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
    2   /***
    3    * JSP Parser for PMD.
    4    * @author Pieter � Application Engineers NV/SA � http://www.ae.be
    5    */
    6
    7   package net.sourceforge.pmd.jsp.ast;
    8
    9   public class TokenMgrError extends RuntimeException {
    10      /*
    11       * Ordinals for various reasons why an Error of this type can be thrown.
    12       */
    13
    14      /***
    15       * Lexical error occured.
    16       */
    17      static final int LEXICAL_ERROR = 0;
    18
    19      /***
    20       * An attempt wass made to create a second instance of a static token manager.
    21       */
    22      static final int STATIC_LEXER_ERROR = 1;
    23
    24      /***
    25       * Tried to change to an invalid lexical state.
    26       */
    27      static final int INVALID_LEXICAL_STATE = 2;
    28
    29      /***
    30       * Detected (and bailed out of) an infinite loop in the token manager.
    31       */
    32      static final int LOOP_DETECTED = 3;
    33
    34      /***
    35       * Indicates the reason why the exception is thrown. It will have
    36       * one of the above 4 values.
    37       */
    38      int errorCode;
    39
    40      /***
    41       * Replaces unprintable characters by their espaced (or unicode escaped)
    42       * equivalents in the given string
    43       */
    44      protected static final String addEscapes(String str) {
    45          StringBuffer retval = new StringBuffer();
    46          char ch;
    47          for (int i = 0; i < str.length(); i++) {
    48              switch (str.charAt(i)) {
    49                  case 0:
    50                      continue;
    51                  case '\b':
    52                      retval.append("//b");
    53                      continue;
    54                  case '\t':
    55                      retval.append("//t");
    56                      continue;
    57                  case '\n':
    58                      retval.append("//n");
    59                      continue;
    60                  case '\f':
    61                      retval.append("//f");
    62                      continue;
    63                  case '\r':
    64                      retval.append("//r");
    65                      continue;
    66                  case '\"':
    67                      retval.append("//\"");
    68                      continue;
    69                  case '\'':
    70                      retval.append("//\'");
    71                      continue;
    72                  case '//':
    73                      retval.append("////");
    74                      continue;
    75                  default:
    76                      if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
    77                          String s = "0000" + Integer.toString(ch, 16);
    78                          retval.append("//u" + s.substring(s.length() - 4, s.length()));
    79                      } else {
    80                          retval.append(ch);
    81                      }
    82                      continue;
    83              }
    84          }
    85          return retval.toString();
    86      }
    87
    88      /***
    89       * Returns a detailed message for the Error when it is thrown by the
    90       * token manager to indicate a lexical error.
    91       * Parameters :
    92       * EOFSeen     : indicates if EOF caused the lexicl error
    93       * curLexState : lexical state in which this error occured
    94       * errorLine   : line number when the error occured
    95       * errorColumn : column number when the error occured
    96       * errorAfter  : prefix that was seen before this error occured
    97       * curchar     : the offending character
    98       * Note: You can customize the lexical error message by modifying this method.
    99       */
    100     protected static 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      * <p/>
    113      * "Internal Error : Please file a bug report .... "
    114      * <p/>
    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 }