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

import org.directwebremoting.json.parse.JsonParseException;

/**
 * This exception is thrown when parse errors are encountered.
 * You can explicitly create objects of this exception type by
 * calling the method generateParseException in the generated
 * parser.
 *
 * You can modify this class to customize your error reporting
 * mechanisms so long as you retain the public fields.
 */
public class ParseException extends JsonParseException
{
    /**
     * This constructor is used by the method "generateParseException"
     * in the generated parser.  Calling this constructor generates
     * a new object of this type with the fields "currentToken",
     * "expectedTokenSequences", and "tokenImage" set.  The boolean
     * flag "specialConstructor" is also set to true to indicate that
     * this constructor was used to create this object.
     * This constructor calls its super class with the empty string
     * to force the "toString" method of parent class "Throwable" to
     * print the error message in the form:
     *     ParseException: <result of getMessage>
     * @param currentTokenVal ...
     * @param expectedTokenSequencesVal ...
     * @param tokenImageVal ...
     */
    public ParseException(Token currentTokenVal, int[][] expectedTokenSequencesVal, String[] tokenImageVal)
    {
        super("");
        specialConstructor = true;
        currentToken = currentTokenVal;
        expectedTokenSequences = expectedTokenSequencesVal;
        tokenImage = tokenImageVal;
    }

    /**
     * The following constructors are for use by you for whatever
     * purpose you can think of.  Constructing the exception in this
     * manner makes the exception behave in the normal way - i.e., as
     * documented in the class "Throwable".  The fields "errorToken",
     * "expectedTokenSequences", and "tokenImage" do not contain
     * relevant information.  The JavaCC generated code does not use
     * these constructors.
     */

    public ParseException()
    {
        super();
        specialConstructor = false;
    }

    public ParseException(String message)
    {
        super(message);
        specialConstructor = false;
    }

    /**
     * This variable determines which constructor was used to create
     * this object and thereby affects the semantics of the
     * "getMessage" method (see below).
     */
    protected boolean specialConstructor;

    /**
     * This is the last token that has been consumed successfully.  If
     * this object has been created due to a parse error, the token
     * following this token will (therefore) be the first error token.
     */
    public Token currentToken;

    /**
     * Each entry in this array is an array of integers.  Each array
     * of integers represents a sequence of tokens (by their ordinal
     * values) that is expected at this point of the parse.
     */
    public int[][] expectedTokenSequences;

    /**
     * This is a reference to the "tokenImage" array of the generated
     * parser within which the parse error occurred.  This array is
     * defined in the generated ...Constants interface.
     */
    public String[] tokenImage;

    /**
     * This method has the standard behavior when this object has been
     * created using the standard constructors.  Otherwise, it uses
     * "currentToken" and "expectedTokenSequences" to generate a parse
     * error message and returns it.  If this object has been created
     * due to a parse error, and you do not catch it (it gets thrown
     * from the parser), then this method is called during the printing
     * of the final stack trace, and hence the correct error message
     * gets displayed.
     * @return ...
     */
    @Override
    public String getMessage()
    {
        if (!specialConstructor)
        {
            return super.getMessage();
        }
        StringBuffer expected = new StringBuffer();
        int maxSize = 0;
        for (int i = 0; i < expectedTokenSequences.length; i++)
        {
            if (maxSize < expectedTokenSequences[i].length)
            {
                maxSize = expectedTokenSequences[i].length;
            }
            for (int j = 0; j < expectedTokenSequences[i].length; j++)
            {
                expected.append(tokenImage[expectedTokenSequences[i][j]]).append(" ");
            }
            if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0)
            {
                expected.append("...");
            }
            expected.append(eol).append("    ");
        }
        String retval = "Encountered \"";
        Token tok = currentToken.next;
        for (int i = 0; i < maxSize; i++)
        {
            if (i != 0)
            {
                retval += " ";
            }
            if (tok.kind == 0)
            {
                retval += tokenImage[0];
                break;
            }
            retval += add_escapes(tok.image);
            tok = tok.next;
        }
        retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
        retval += "." + eol;
        if (expectedTokenSequences.length == 1)
        {
            retval += "Was expecting:" + eol + "    ";
        }
        else
        {
            retval += "Was expecting one of:" + eol + "    ";
        }
        retval += expected.toString();
        return retval;
    }

    /**
     * The end of line string for this machine.
     */
    protected String eol = System.getProperty("line.separator", "\n");

    /**
     * Used to convert raw characters to their escaped version
     * when these raw version cannot be used as part of an ASCII
     * string literal.
     * @param str ...
     * @return ...
     */
    protected String add_escapes(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").append(s.substring(s.length() - 4));
                }
                else
                {
                    retval.append(ch);
                }
                continue;
            }
        }
        return retval.toString();
    }

}