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