testinferenceengine4multipleresults2.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

package test.org.mandarax.reference;

/*
 * 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
 */
import java.util.ArrayList;
import java.util.List;

import org.mandarax.kernel.InferenceEngine;
import org.mandarax.kernel.KnowledgeBase;
import org.mandarax.kernel.Query;

/**
 * Simple test using familiy relationships. 
 * Similar to TestInferenceEngine4MultipleResults1, but with a cardinality constraint 
 * specifying that only the first result should be retrieved.
 * @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 TestInferenceEngine4MultipleResults2 extends TestInferenceEngine4MultipleResults {
	/**
	 * Constructor.
	 * @param aKnowledgeBase a new, uninitialized knowledge base that will be used
	 * @param anInferenceEngine the inference engine that will be tested
	 */
	public TestInferenceEngine4MultipleResults2(KnowledgeBase aKnowledgeBase,InferenceEngine anInferenceEngine) {
		super (aKnowledgeBase, anInferenceEngine);
	}
	/**
	 * Get the cardinality constraint (how many solutions
	 * should be compouted). Default is <code>InferenceEngine.ONE</code>
	 * @return the number of expected results
	 */
	public int getCardinalityConstraint() {
		return InferenceEngine.ONE;
	}
	/**
	 * Add facts and rules to the knowledge base.
	 * @param knowledge org.mandarax.kernel.KnowledgeBase
	 */
	public void feedKnowledgeBase(KnowledgeBase knowledge) {
		knowledge.removeAll ();
		knowledge.add (Person.getRule ("isGrandFatherOf", "x", "z", "isFatherOf","y", "z", "isFatherOf", "x", "y"));
		knowledge.add (Person.getFact ("isOncleOf", "Ulf", "Max"));
		knowledge.add (Person.getFact ("isOncleOf", "Heinz", "Jens"));
		knowledge.add (Person.getRule ("isOncleOf", "x", "z", "isFatherOf","y", "z", "isBrotherOf", "x", "y"));
		knowledge.add (Person.getFact ("isFatherOf", "Lutz", "Frank"));
		knowledge.add (Person.getFact ("isFatherOf", "Klaus", "Jens"));
		knowledge.add (Person.getFact ("isBrotherOf", "Lutz", "Klaus"));
		knowledge.add (Person.getFact ("isBrotherOf", "Guenther", "Klaus"));
		knowledge.add (Person.getFact ("isBrotherOf", "Werner", "Klaus"));
	}
	/**
	 * Get a description of this test case.
	 * This is used by the <code>org.mandarax.demo</code>
	 * package to display the test cases.
	 * @return a brief description of the test case
	 */
	public String getDescription() {
		return "Simple test for multiple results.";
	}
	/**
	 * Get the persons we are looking for.
	 * @return the name of the person
	 */
	public List getExpectedResults() {
		ArrayList list = new ArrayList();
		list.add(Person.get("Heinz"));
		return list;		
	}
	/**
	 * Get the query.
	 * @return a query
	 */
	public Query getQuery() {
		return Person.getQuery ("isOncleOf",QUERY_VARIABLE, "Jens");
	}
}