isdirectsubclassof.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.tests;

import java.util.Iterator;

import org.openrdf.model.Resource;

import org.openrdf.sesame.sail.RdfSchemaSource;
import org.openrdf.sesame.sail.test.benchmark.model.Binary;
import org.openrdf.sesame.sail.test.benchmark.pools.RdfSchemaSourcePool;

/**
 * Tests performance of org.openrdf.sesame.sail.RdfSchemaSource.isDirectSubClassOf.
 *
 * @author Peter van 't Hof.
 * @version %I%, %G%
 */
public class IsDirectSubClassOf extends RdfSchemaSourceBMTestB {

/*-------------+
| Constructors |
+-------------*/
	/**
	 * Creates a new benchmark test which tests
	 * org.openrdf.sesame.sail.RdfSchemaSource.isDirectSubClassOf.
	 *
	 * @param rdfSchemaSource RdfSchemaSource to test.
	 */
	public IsDirectSubClassOf(RdfSchemaSource rdfSchemaSource) {
		super("isDirectSubClassOf", rdfSchemaSource);

		_needsPool = true;
	}

/*--------+
| Methods |
+--------*/
   	/* Queries if a subClass which is a subClass of superClass is a
	 * subClass of superClass.
	 */
	protected void _testA() {
		Iterator i = _cutDown(RdfSchemaSourcePool.directSubClassOfRelations, 100).iterator();
		
		while (i.hasNext()) {
			Binary subClassOfRelation = (Binary)i.next();
			Resource subClass = (Resource)subClassOfRelation.getLeft();
			Resource superClass = (Resource)subClassOfRelation.getRight();			

			_startA();				
			_isDirectSubClassOf(subClass, superClass, true);
			_stopA();
		}
	}

	protected void _testB() {
		// Part one: query if resources are a subClass of eachother, pattern
		// consists of resources which do not exist, resources which do exist but
		// are no class and classes.
		Iterator noClassesIter = _cutDown(RdfSchemaSourcePool.noClasses, 100).iterator();
		Iterator classesIter = _cutDown(RdfSchemaSourcePool.classes, 100).iterator();

		while (noClassesIter.hasNext() && classesIter.hasNext()) {
			Resource noClass = (Resource)noClassesIter.next();
			Resource classResource = (Resource)classesIter.next();
			
			_startB();

			_isDirectSubClassOf(noClass, RdfSchemaSourcePool.noSubject, false);
			_isDirectSubClassOf(RdfSchemaSourcePool.noSubject, noClass, false);
			_isDirectSubClassOf(noClass, noClass, false);
			_isDirectSubClassOf(classResource, RdfSchemaSourcePool.noSubject, false);
			_isDirectSubClassOf(RdfSchemaSourcePool.noSubject, classResource, false);
			_isDirectSubClassOf(noClass, classResource, false);
			_isDirectSubClassOf(classResource, noClass, false);

			_stopB(7);
		}

		// Part two: query if subclass which is NOT a subClass of superClass
		// is a subClass of superClass.
		Iterator i = _cutDown(RdfSchemaSourcePool.noSubClassOfRelations, 100).iterator();
		
		while (i.hasNext()) {
			Binary subClassOfRelation = (Binary)i.next();
			Resource subClass = (Resource)subClassOfRelation.getLeft();
			Resource superClass = (Resource)subClassOfRelation.getRight();

			_startB();
			_isDirectSubClassOf(subClass, superClass, false);
			_stopB();
		}
	}

	protected void _isDirectSubClassOf(
			Resource subClass, Resource superClass, boolean expected)
	{
		if (expected != _rdfSchemaSource.isDirectSubClassOf(subClass, superClass)) {
			_error("isDirectSubClassOf(" + subClass + ", " + superClass + ") should be " + expected);
		}
	}

	public String toString() {
		return _toString("True", "False");
	}
}