testinferenceengine17.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="mailto:[e-mail]">Hans-Henning Wiesner</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 org.mandarax.kernel.InferenceEngine;
import org.mandarax.kernel.InferenceException;
import org.mandarax.kernel.KnowledgeBase;
import org.mandarax.kernel.Query;
import org.mandarax.kernel.ResultSet;
import org.mandarax.lib.math.IntArithmetic;

/**
 * Tests unifying of complex terms.
 * @author <A HREF="mailto:[e-mail]">Hans-Henning Wiesner</A>
 * @version 3.4 <7 March 05>
 * @since 2.2.1
 */
public class TestInferenceEngine17 extends TestInferenceEngineUseMath {
	
      
    /**
     * Constructor.
     * @param aKnowledgeBase a new, uninitialized knowledge base that will be used
     * @param anInferenceEngine the inference engine that will be tested
     */
    public TestInferenceEngine17(KnowledgeBase aKnowledgeBase,InferenceEngine anInferenceEngine) {
        super (aKnowledgeBase, anInferenceEngine);
    }

    /**
     * Add facts and rules to the knowledge base.
     * @param knowledge org.mandarax.kernel.KnowledgeBase
     */
    public void feedKnowledgeBase(KnowledgeBase knowledge) {
        knowledge.removeAll ();        
                       
        knowledge.add(
        	lfs.rule(
	        	lfs.prereq(P3,lfs.variable(QUERY_VARIABLE, Integer.class)),         	        	
	        	lfs.prereq(P1,lfs.cplx(IntArithmetic.PLUS,
	        							lfs.cons(new Integer(1), Integer.class),
	        							lfs.variable(QUERY_VARIABLE, Integer.class))),        	        	
				lfs.fact(P2,lfs.variable(QUERY_VARIABLE, Integer.class))  
			) 
        );
        knowledge.add(
        	lfs.fact(P3,lfs.cons(new Integer(0), Integer.class))
        );  
        knowledge.add(
        	lfs.fact(P1,lfs.cons(new Integer(1), Integer.class))
        );                       
    }
    
    /**
     * Get the expected number.
     * @return the name of the person
     */
    int getExpectedNumber() {
    	//RobinsonsUnificationAlgorithm
    	//because no unification of +([1],[0]) and [1] is done    	
		//return -1; 
    	//ExtendedRobinsonsUnificationAlgorithm    	
    	return 0;
    }    

    /**
     * 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 "Testing complex terms in result sets";
    }

    /**
     * Get the query.
     * @return a query
     */
    public Query getQuery() {
        return lfs.query(lfs.fact(P2,lfs.variable(QUERY_VARIABLE, Integer.class)),"a query");
    }
    
    /**
     * Run the test.
     */
    public void testInferenceEngine() {
        LOG_TEST.info ("Start Testcase " + getClass ().getName () + " , test method: " + "testInferenceEngine()");
		try {
        	ResultSet rs    = ie.query (getQuery(),kb,getCardinalityConstraint(),InferenceEngine.BUBBLE_EXCEPTIONS);
        	int expected = getExpectedNumber();
        	boolean succ = rs.next();
        	if (expected==-1) {
        		assertTrue(!succ);
        		return;	
        	}      	
        	int computed = ((Integer)rs.getResult(Integer.class, QUERY_VARIABLE)).intValue();
        	assertTrue (expected==computed);
		}
		catch (InferenceException x) {
			assertTrue(false);
		}
        LOG_TEST.info ("Finish Testcase " + getClass ().getName () + " , test method: " + "testInferenceEngine()");
    }
}