View Javadoc

    1   /* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 4.1 */
    2   /* JavaCCOptions: */
    3   /**
    4    * JSP Parser for PMD.
    5    * @author Pieter ? Application Engineers NV/SA ? http://www.ae.be
    6    */
    7
    8   package net.sourceforge.pmd.jsp.ast;
    9
    10  /** Token Manager Error. */
    11  public class TokenMgrError extends RuntimeException
    12  {
    13
    14     /*
    15      * Ordinals for various reasons why an Error of this type can be thrown.
    16      */
    17
    18     /**
    19      * Lexical error occurred.
    20      */
    21     static final int LEXICAL_ERROR = 0;
    22
    23     /**
    24      * An attempt was made to create a second instance of a static token manager.
    25      */
    26     static final int STATIC_LEXER_ERROR = 1;
    27
    28     /**
    29      * Tried to change to an invalid lexical state.
    30      */
    31     static final int INVALID_LEXICAL_STATE = 2;
    32
    33     /**
    34      * Detected (and bailed out of) an infinite loop in the token manager.
    35      */
    36     static final int LOOP_DETECTED = 3;
    37
    38     /**
    39      * Indicates the reason why the exception is thrown. It will have
    40      * one of the above 4 values.
    41      */
    42     int errorCode;
    43
    44     /**
    45      * Replaces unprintable characters by their escaped (or unicode escaped)
    46      * equivalents in the given string
    47      */
    48     protected static final String addEscapes(String str) {
    49        StringBuffer retval = new StringBuffer();
    50        char ch;
    51        for (int i = 0; i < str.length(); i++) {
    52          switch (str.charAt(i))
    53          {
    54             case 0 :
    55                continue;
    56             case '\b':
    57                retval.append("\\b");
    58                continue;
    59             case '\t':
    60                retval.append("\\t");
    61                continue;
    62             case '\n':
    63                retval.append("\\n");
    64                continue;
    65             case '\f':
    66                retval.append("\\f");
    67                continue;
    68             case '\r':
    69                retval.append("\\r");
    70                continue;
    71             case '\"':
    72                retval.append("\\\"");
    73                continue;
    74             case '\'':
    75                retval.append("\\\'");
    76                continue;
    77             case '\\':
    78                retval.append("\\\\");
    79                continue;
    80             default:
    81                if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
    82                   String s = "0000" + Integer.toString(ch, 16);
    83                   retval.append("\\u" + s.substring(s.length() - 4, s.length()));
    84                } else {
    85                   retval.append(ch);
    86                }
    87                continue;
    88          }
    89        }
    90        return retval.toString();
    91     }
    92
    93     /**
    94      * Returns a detailed message for the Error when it is thrown by the
    95      * token manager to indicate a lexical error.
    96      * Parameters :
    97      *    EOFSeen     : indicates if EOF caused the lexical error
    98      *    curLexState : lexical state in which this error occurred
    99      *    errorLine   : line number when the error occurred
    100     *    errorColumn : column number when the error occurred
    101     *    errorAfter  : prefix that was seen before this error occurred
    102     *    curchar     : the offending character
    103     * Note: You can customize the lexical error message by modifying this method.
    104     */
    105    protected static String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar) {
    106       return("Lexical error at line " +
    107            errorLine + ", column " +
    108            errorColumn + ".  Encountered: " +
    109            (EOFSeen ? "<EOF> " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
    110            "after : \"" + addEscapes(errorAfter) + "\"");
    111    }
    112
    113    /**
    114     * You can also modify the body of this method to customize your error messages.
    115     * For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
    116     * of end-users concern, so you can return something like :
    117     *
    118     *     "Internal Error : Please file a bug report .... "
    119     *
    120     * from this method for such cases in the release version of your parser.
    121     */
    122    public String getMessage() {
    123       return super.getMessage();
    124    }
    125
    126    /*
    127     * Constructors of various flavors follow.
    128     */
    129
    130    /** No arg constructor. */
    131    public TokenMgrError() {
    132    }
    133
    134    /** Constructor with message and reason. */
    135    public TokenMgrError(String message, int reason) {
    136       super(message);
    137       errorCode = reason;
    138    }
    139
    140    /** Full Constructor. */
    141    public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar, int reason) {
    142       this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
    143    }
    144 }
    145 /* JavaCC - OriginalChecksum=56dfce4188771884defbd50c7c708c54 (do not edit this line) */