/* Copyright 2009-2016 David Hadka
 *
 * This file is part of the MOEA Framework.
 *
 * The MOEA Framework is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * The MOEA Framework is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the MOEA Framework.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.moeaframework.algorithm;

import org.moeaframework.core.Algorithm;
import org.moeaframework.core.FrameworkException;

/**
 * An exception that originated from an algorithm.
 */
public class AlgorithmException extends FrameworkException {

	private static final long serialVersionUID = 6255824096225403552L;
	
	/**
	 * The algorithm responsible for this exception.
	 */
	private final Algorithm algorithm;
	
	/**
	 * Constructs an algorithm exception originating from the specified
	 * algorithm.
	 * 
	 * @param algorithm the algorithm responsible for this exception
	 */
	public AlgorithmException(Algorithm algorithm) {
		this(algorithm, null, null);
	}
	
	/**
	 * Constructs an algorithm exception originating from the specified
	 * algorithm with the given cause.
	 * 
	 * @param algorithm the algorithm responsible for this exception
	 * @param cause the cause of this exception
	 */
	public AlgorithmException(Algorithm algorithm, Throwable cause) {
		this(algorithm, cause.getMessage(), cause);
	}
	
	/**
	 * Constructs an algorithm exception originating from the specified
	 * algorithm with the given message.
	 * 
	 * @param algorithm the algorithm responsible for this exception
	 * @param message the message describing this exception
	 */
	public AlgorithmException(Algorithm algorithm, String message) {
		this(algorithm, message, null);
	}
	
	/**
	 * Constructs an algorithm exception originating from the specified
	 * algorithm with the given message and cause.
	 * 
	 * @param algorithm the algorithm responsible for this exception
	 * @param message the message describing this exception
	 * @param cause the cause of this exception
	 */
	public AlgorithmException(Algorithm algorithm, String message, 
			Throwable cause) {
		super(message, cause);
		this.algorithm = algorithm;
	}

	/**
	 * Returns the algorithm responsible for this exception.
	 * 
	 * @return the algorithm responsible for this exception
	 */
	public Algorithm getAlgorithm() {
		return algorithm;
	}

}