TokenMgrError.java

/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
package com.hundsun.jresplus.common.util.html;


public class TokenMgrError extends Error {
    /*
     * Ordinals for various reasons why an Error of this type can be thrown.
     */

    /** Comment for <code>serialVersionUID</code> */
    private static final long serialVersionUID = 3257001055886587441L;

    /** Lexical error occured. */
    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 occured errorLine   : line number when the
     * error occured errorColumn : column number when the error occured errorAfter  : prefix that
     * was seen before this error occured curchar     : the offending character Note: You can
     * customize the lexical error message by modifying this method.
     */
    protected static 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.
     */
    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);
    }
}