
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.jexl3.parser;

/**
 * This exception is thrown when parse errors are encountered.
 */
public class ParseException extends Exception implements JavaccError {

    /**
     * The version identifier.
     */
    private static final long serialVersionUID = 1L;

    /**
     * Last correct input before error occurs.
     */
    private String after = "";

    /**
     * Error line.
     */
    private int line = -1;

    /**
     * Error column.
     */
    private int column = -1;

    /**
     * Constructs a new exception with {@code null} as its detail message. The cause is not initialized, and may subsequently be initialized by a call to
     * {@link #initCause}.
     */
    public ParseException() {
    }

    /**
     * Constructs a new exception with the specified detail message. The cause is not initialized, and may subsequently be initialized by a call to
     * {@link #initCause}.
     *
     * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method.
     */
    public ParseException(final String message) {
        super(message);
    }

    /**
     * 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.
     *
     * @param currentToken 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.
     * @param expectedTokenSequences 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.
     * @param tokenImage 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 ParseException(final Token currentToken, final int[][] expectedTokenSequences, final String[] tokenImage) {
        super("parse error");
        final Token tok = currentToken.next;
        after = tok.image;
        line = tok.beginLine;
        column = tok.beginColumn;
    }

    @Override
    public String getAfter() {
        return after;
    }

    @Override
    public int getColumn() {
        return column;
    }

    @Override
    public int getLine() {
        return line;
    }
}
