getstatements.java

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/*  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.model.Statement;
import org.openrdf.model.URI;
import org.openrdf.model.Value;

import org.openrdf.sesame.sail.RdfSource;
import org.openrdf.sesame.sail.StatementIterator;
import org.openrdf.sesame.sail.test.benchmark.model.BMStatement;
import org.openrdf.sesame.sail.test.benchmark.pools.RdfSourcePool;

/**
 * Tests performance of org.openrdf.sesame.sail.RdfSource.getStatements.
 *
 * @author Peter van 't Hof
 * @version %I%, %G%
 */
public class GetStatements extends RdfSourceBMTestB {

/*-------------+
| Constructors |
+-------------*/
	/**
	 * Creates a new benchmark test which tests 
	 * org.openrdf.sesame.sail.RdfSource.getStatements.
	 *
	 * @param rdfSource RdfSource to test.
	 */
	public GetStatements(RdfSource rdfSource) {
		super("getStatements", rdfSource);

		_needsPool = true;
	}

/*--------+
| Methods |
+--------*/
	// This method consists of two parts. See below.
	protected void _testA() {

		// Part one: get all statements.
		_startA();
		_getStatements(null, null, null, true);
		_stopA();

		/* Part two: get all statements and query any combination of subject,
		 * predicate, object of statement and wildcards.
 		 */
		Iterator i = _cutDown(RdfSourcePool.statements, 16).iterator();

		while (i.hasNext()) {
			BMStatement statement = (BMStatement)i.next();
			Resource subject = statement.getSubject();
			URI predicate = statement.getPredicate();
			Value object = statement.getObject();

			_startA();

			_getStatements(subject, null, null, true);
			_getStatements(null, predicate, null, true);
			_getStatements(null, null, object, true);
			_getStatements(subject, predicate, null, true);
			_getStatements(subject, null, object, true);
			_getStatements(null, predicate, object, true);
			_getStatements(subject, predicate, object, true);
			
			_stopA(7);
		}
	}

	// This method consists of three parts. See below.
	protected void _testB() {	

		/* Part one: get statements. Pattern consists of values which do not
		 * exist and wildcards.
		 */
		_startB();

		_getStatements(RdfSourcePool.noSubject, null, null, false);
		_getStatements(null, RdfSourcePool.noPredicate, null, false);
		_getStatements(null, null, RdfSourcePool.noObject, false);
		_getStatements(RdfSourcePool.noSubject, RdfSourcePool.noPredicate, null, false);
		_getStatements(RdfSourcePool.noSubject, null, RdfSourcePool.noObject, false);
		_getStatements(null, RdfSourcePool.noPredicate, RdfSourcePool.noObject, false);
		_getStatements(RdfSourcePool.noSubject, RdfSourcePool.noPredicate, RdfSourcePool.noObject, false);
		
		_stopB(7);

		/* Part two: get statements. Pattern consists of values which do not
		 * exist, existing values and wildcards.
		 */
		Iterator i = _cutDown(RdfSourcePool.statements, 8).iterator();

		while (i.hasNext()) {
			BMStatement statement = (BMStatement)i.next();

			Resource subject = statement.getSubject();
			URI predicate = statement.getPredicate();
			Value object = statement.getObject();

			_startB();

			_getStatements(RdfSourcePool.noSubject, predicate, null, false);
			_getStatements(RdfSourcePool.noSubject, null, object, false);
			_getStatements(RdfSourcePool.noSubject, predicate, object, false);

			_getStatements(null, RdfSourcePool.noPredicate, object, false);
			_getStatements(subject, RdfSourcePool.noPredicate, null, false);
			_getStatements(subject, RdfSourcePool.noPredicate, object, false);

			_getStatements(subject, null, RdfSourcePool.noObject, false);
			_getStatements(null, predicate, RdfSourcePool.noObject, false);
			_getStatements(subject, predicate, RdfSourcePool.noObject, false);
			
			_getStatements(RdfSourcePool.noSubject, RdfSourcePool.noPredicate, object, false);
			_getStatements(RdfSourcePool.noSubject, predicate, RdfSourcePool.noObject, false);
			_getStatements(subject, RdfSourcePool.noPredicate, RdfSourcePool.noObject, false);

			_stopB(12);
		}

		/* Part three: Get statements. Pattern consists of statements which do
		 * not exist.
		 */
		Iterator l = _cutDown(RdfSourcePool.noStatements, 8).iterator();

		while (l.hasNext()) {
			BMStatement noStatement = (BMStatement)l.next();
			Resource subject = noStatement.getSubject();
			URI predicate = noStatement.getPredicate();
			Value object = noStatement.getObject();

			_startB();			
			_getStatements(subject, predicate, object, false);			
			_stopB();
		}
	}

	/* Call to RdfSource. Checks if result is equal to expected result. Iterates
	 * statements and retrieves and uses subject, predicate an object and used to
	 * simulate realworld use.
	 */
	protected void _getStatements(
			Resource subject, URI predicate, Value object, boolean expected)
	{
		StatementIterator i = _rdfSource.getStatements(subject, predicate, object);

		if (i.hasNext() != expected) {
			String error = "getStatements(" +
				new BMStatement(subject, predicate, object) + ") should return ";

			if (!expected) {
				error += "no ";
			}

			error += "statements.";

			_error(error);
		}

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

		i.close();
	}

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