binary.java

这是外国一个开源推理机

/*  Sesame - Storage and Querying architecture for RDF and RDF Schema
 *  Copyright (C) 2001-2005 Aduna
 *
 *  Contact: 
 *  	Aduna
 *  	Prinses Julianaplein 14 b
 *  	3817 CS Amersfoort
 *  	The Netherlands
 *  	tel. [phone]
 *  	fax. [phone]
 *
 *  	http://aduna.biz/
 *  	http://www.openrdf.org/
 *  
 *  This library 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 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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 this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.openrdf.sesame.sail.test.benchmark.model;

import java.io.Serializable;

import org.openrdf.model.Value;

/**
 * Represents a relation between two values, i.e subClassOf, subPropertyOf or
 * instanceOf.
 *
 * @author Peter van 't Hof.
 * @version %I%, %G%
 */
public class Binary implements Serializable {

/*----------+
| Variables |
+----------*/
	// Left part of relation.
	protected Value _left;

	// Right part of relation.
	protected Value _right;

/*-------------+
| Constructors |
+-------------*/
	/**
	 * Creates a new Binary.
	 *
	 * @param left Left part of relation.
	 * @param right Right part of relation.
	 */
	public Binary(Value left, Value right) {
		_left = left;
		_right = right;
	}

/*--------+
| Methods |
+--------*/
	/**
	 * Gets left part of relation.
	 *
	 * @return Left part of relation.
	 */ 
	public Value getLeft() {
		return _left;
	}

	/**
	 * Gets right part of relation.
	 *
	 * @return Right part of relation.
	 */ 
	public Value getRight() {
		return _right;
	}


	/**
	 * Indicates whether some other object is equal to this one.
	 *
	 * @return True if this object is the same as the obj argument; false
	 * otherwise.
	 */
	public boolean equals(Object other) {
		if (this == other) {
			return true;
		}
		else if (other instanceof Binary) {
				Binary binaryRelation = (Binary)other;
				
				return _left.equals(binaryRelation._left) && 
					_right.equals(binaryRelation._right);
		}

		return false;
	}
	
	/**
	 * Returns hashcode of Binary.
	 *
	 * @return Hashcode of Binary.
	 */
	public int hashCode() {
		return _left.hashCode() + _right.hashCode();
	}
}