changenamespaceprefix.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.util.StringUtil;

import org.openrdf.sesame.sail.NamespaceIterator;
import org.openrdf.sesame.sail.RdfRepository;
import org.openrdf.sesame.sail.SailUpdateException;
import org.openrdf.sesame.sail.test.benchmark.model.BMNamespace;
import org.openrdf.sesame.sail.test.benchmark.pools.RdfRepositoryPool;

/**
 * Tests performance of
 * org.openrdf.sesame.sail.RdfRepository.changeNamespacePrefix.
 *
 * @author Peter van 't Hof.
 * @version %I%, %G%
 */
public class ChangeNamespacePrefix extends RdfRepositoryBMTestB {

/*-------------+
| Constructors |
+-------------*/
	/**
	 * Creates a new benchmark test which tests
	 * org.openrdf.sesame.sail.RdfRepository.changeNamespacePrefix.
	 *
	 * @param rdfRepository RdfRepository to test.
	 */
	public ChangeNamespacePrefix(RdfRepository rdfRepository) {
		super("changeNamespacePrefix", rdfRepository);		

		_needsPool = true;
	}

/*--------+
| Methods |
+--------*/
	// Changes namespace and restores it back to old value.
	protected void _testA() 
		throws SailUpdateException {
		Iterator i = _cutDown(RdfRepositoryPool.namespaces, 50).iterator();

		while (i.hasNext()) {
			BMNamespace namespace = (BMNamespace)i.next();				
			String prefix = namespace.getPrefix();
			String name = namespace.getName();				
			
			_startA();			
			_rdfRepository.changeNamespacePrefix
				(name, RdfRepositoryPool.noPrefix);

			_stopA();

			_checkResult(name, RdfRepositoryPool.noPrefix, true);

			_startA();
			_rdfRepository.changeNamespacePrefix(name, prefix);			
			_stopA();

			_checkResult(name, prefix, true);
		}
	}

	// Changes namespace which does not exist.	
	protected void _testB() 
		throws SailUpdateException {
		_startB();					
		_rdfRepository.changeNamespacePrefix
			(RdfRepositoryPool.noName, RdfRepositoryPool.noPrefix);		

		_stopB();

		_checkResult
			(RdfRepositoryPool.noName, RdfRepositoryPool.noPrefix, false);
	}

	// Checks if result is equal to expected result.
	protected void _checkResult(String name, String prefix, boolean expected)
		throws SailUpdateException {
		boolean found = false;
		NamespaceIterator i = _rdfRepository.getNamespaces();
		
		while(i.hasNext() && !found) {
			i.next();

			if (i.getName().equals(name) && i.getPrefix().equals(prefix)) {
				found = true;
			}
		}

		i.close();
		
		if (found != expected) {
			String error = 
				"changeNamespacePrefix(" + name + ", " + prefix + ") should ";

			if (!expected) {
				error += "not ";
			}

			error += "change namespace prefix.";

			_error(error);
		}
	}	

	public String toString() {
		return StringUtil.gsub
			(_name.toUpperCase(), "CHANGENAMESPACE\t|\nPREFIX\t\t", 
			 super._toString("Changed", "Not changed"));
	}
}