getdirectsubclassof.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.StatementIterator;
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.getDirectSubClassOf.
 *
 * @author Peter van 't Hof.
 * @version %I%, %G%
 */
public class GetDirectSubClassOf extends RdfSchemaSourceBMTestB {

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

		_needsPool = true;
	}

/*--------+
| Methods |
+--------*/

	// Gets subClasses of superClasses which have subClasses.
	protected void _testA() {
		// Part one: get all subClassOf relations.
		_startA();
		_getDirectSubClassOf(null, null, true);
		_stopA();

		// Part two: get all subClassOf relations and query any combination
		// of sub- and superclass.
		Iterator i = _cutDown(RdfSchemaSourcePool.subClassOfRelations, 32).iterator();

		while (i.hasNext()) {
			Binary binary = (Binary)i.next();
			Resource subClass = (Resource)binary.getLeft();
			Resource superClass = (Resource)binary.getRight();

			_startA();
			_getDirectSubClassOf(subClass, null, true);
			_getDirectSubClassOf(null, superClass, true);
			_getDirectSubClassOf(subClass, superClass, true);
			_stopA(3);
		}
	}

	// This method consists of two parts. See below.
	protected void _testB() {
		Iterator i = _cutDown(RdfSchemaSourcePool.noClasses, 32).iterator();
		
		while (i.hasNext()) {
			Resource noClass = (Resource)i.next();
			
			_startB();
			_getDirectSubClassOf(noClass, null, false);
			_getDirectSubClassOf(null, noClass, false);
			_getDirectSubClassOf(noClass, noClass, false);
			_stopB(3);
		}
	}

	/* Call to RdfSchemaSource. Checks if result is equal to expected result.
	 * SubClasses are iterated to simulate realworld use.
	 */
	protected void _getDirectSubClassOf(
			Resource subClass, Resource superClass, boolean expected)
	{
		StatementIterator i = _rdfSchemaSource.getDirectSubClassOf(subClass, superClass);
		
		if (i.hasNext() != expected) {
			String errMsg = "getDirectSubClassOf(" + subClass + ", " + superClass + ") should return ";
			if (expected == false) {
				errMsg += "no ";
			}
			errMsg += "results.";
			
			_error(errMsg);
		}

		while (i.hasNext()) {
			_simulateUsage(i.next());
		}

		i.close();
	}

	public String toString() {
		return _toString("Results", "No results");
	}
}