org.directwebremoting.json.parse.javacc.TokenMgrError Maven / Gradle / Ivy

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/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
package org.directwebremoting.json.parse.javacc;

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

    /**
     * Lexical error occurred.
     */
    static final int LEXICAL_ERROR = 0;

    /**
     * An attempt was 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 escaped (or unicode escaped)
     * equivalents in the given string
     * @param str ...
     * @return ...
     */
    protected static 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 lexical 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.
     * @param EOFSeen ...
     * @param lexState Not used
     * @param errorLine ...
     * @param errorColumn ...
     * @param errorAfter ...
     * @param curChar ...
     * @return ...     * @param page The URL of the page on which we sit
     */
    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 ? " " : ("\"" + 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);
    }
}