testknowledgebaseaddclause2.java

Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规则

/*
 * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
 *
 * 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 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 test.org.mandarax.reference;

import java.util.HashSet;
import java.util.Iterator;

import org.mandarax.kernel.Clause;
import org.mandarax.kernel.ClauseSetException;
import org.mandarax.util.ClauseIterator;

/**
 * Test adding a fact to a knowledge base. Here we add a set of clauses
 * and check whether the set of clauses returned by <code>clauses(Clause query,Object additionalParameter)</code>
 * is the expected subset. Note that we compare instances of <code>HashSet</code>.
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 1.1
 */
public class TestKnowledgeBaseAddClause2 extends TestKnowledgeBase {

	/**
	 * Constructor.
	 * @param aKnowledgeBase a knowledge base
	 */
	public TestKnowledgeBaseAddClause2(org.mandarax.kernel.KnowledgeBase aKnowledgeBase) {
		super(aKnowledgeBase);
	}

	/**
	 * Run the test.
	 */
	public void testKnowledgeBase() {
		kb.removeAll();

		// input knowledge
		HashSet input = new HashSet();

		input.add(Person.getFact("isFatherOf", "Jens", "Max"));
		input.add(Person.getFact("isFatherOf", "Klaus", "Jens"));
		input.add(Person.getRule("isFatherOf", "x", "y", "isFatherOf", "y", "x"));

		// add additional knowledge
		kb.add(Person.getRule("isGrandFatherOf", "x", "z", "isFatherOf", "y", "z", "isFatherOf", "x", "y"));

		// add the knowledge base
		for (Iterator it = input.iterator(); it.hasNext();) {
			kb.add((Clause) it.next());
		}

		// add additional knowledge
		kb.add(Person.getFact("isBrotherOf", "Lutz", "Klaus"));

		// collect output in a set
		HashSet output = new HashSet();

		try {
			for (ClauseIterator it = kb.clauses(Person.getFact("isFatherOf", "Jens", "Max"), null);
				it.hasMoreClauses();
				) {
				output.add(it.nextClause());
			}

			// compare the two sets
			assertTrue(input.equals(output));
		}
		catch (ClauseSetException x) {
			assertTrue(false);
		}
	}
}