objecttypenodetest.java

jboss规则引擎

package org.drools.reteoo;

/*
 * Copyright 2005 JBoss Inc
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.List;

import org.drools.DroolsTestCase;
import org.drools.FactException;
import org.drools.base.ClassObjectType;
import org.drools.common.DefaultFactHandle;
import org.drools.common.PropagationContextImpl;
import org.drools.spi.ObjectType;
import org.drools.spi.PropagationContext;
import org.drools.util.PrimitiveLongMap;

public class ObjectTypeNodeTest extends DroolsTestCase {

    public void testAttach() throws Exception {
        final Rete source = new Rete();

        final ObjectType objectType = new ClassObjectType( String.class );

        final ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                                  objectType,
                                                                  source );

        assertEquals( 1,
                      objectTypeNode.getId() );

        assertLength( 0,
                      source.getObjectTypeNodes() );

        objectTypeNode.attach();

        assertLength( 1,
                      source.getObjectTypeNodes() );

        assertSame( objectTypeNode,
                    source.getObjectTypeNode( objectType ) );
    }

    public void testAssertObject() throws Exception {
        final PropagationContext context = new PropagationContextImpl( 0,
                                                                       PropagationContext.ASSERTION,
                                                                       null,
                                                                       null );

        final ReteooWorkingMemory workingMemory = new ReteooWorkingMemory( new ReteooRuleBase() );

        final Rete source = new Rete();

        final ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                                  new ClassObjectType( String.class ),
                                                                  source );

        final MockObjectSink sink = new MockObjectSink();
        objectTypeNode.addObjectSink( sink );

        final Object string1 = "cheese";

        final DefaultFactHandle handle1 = (DefaultFactHandle) workingMemory.assertObject( string1 );

        /* should assert as ObjectType matches */
        objectTypeNode.assertObject( handle1,
                                     context,
                                     workingMemory );

        /* make sure just string1 was asserted */
        final List asserted = sink.getAsserted();
        assertLength( 1,
                      asserted );
        assertSame( string1,
                    workingMemory.getObject( (DefaultFactHandle) ((Object[]) asserted.get( 0 ))[0] ) );

        /* check asserted object was added to memory */
        final PrimitiveLongMap memory = (PrimitiveLongMap) workingMemory.getNodeMemory( objectTypeNode );
        assertEquals( 1,
                      memory.size() );
        assertSame( handle1,
                    memory.get( handle1.getId() ) );
    }

    public void testMemory() {
        final ReteooWorkingMemory workingMemory = new ReteooWorkingMemory( new ReteooRuleBase() );

        final ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                                  new ClassObjectType( String.class ),
                                                                  new Rete() );

        final PrimitiveLongMap memory = (PrimitiveLongMap) workingMemory.getNodeMemory( objectTypeNode );

        assertNotNull( memory );
    }

    public void testMatches() {

        final Rete source = new Rete();

        ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                            new ClassObjectType( String.class ),
                                                            source );

        assertFalse( objectTypeNode.matches( new Object() ) );
        assertFalse( objectTypeNode.matches( new Integer( 5 ) ) );
        assertTrue( objectTypeNode.matches( "string" ) );

        objectTypeNode = new ObjectTypeNode( 1,
                                             new ClassObjectType( Object.class ),
                                             source );

        assertTrue( objectTypeNode.matches( new Object() ) );
        assertTrue( objectTypeNode.matches( new Integer( 5 ) ) );
        assertTrue( objectTypeNode.matches( "string" ) );

    }

    public void testRetractObject() throws Exception {
        final PropagationContext context = new PropagationContextImpl( 0,
                                                                       PropagationContext.ASSERTION,
                                                                       null,
                                                                       null );

        final ReteooWorkingMemory workingMemory = new ReteooWorkingMemory( new ReteooRuleBase() );

        final Rete source = new Rete();

        final ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                                  new ClassObjectType( String.class ),
                                                                  source );

        final MockObjectSink sink = new MockObjectSink();
        objectTypeNode.addObjectSink( sink );

        final Object string1 = "cheese";

        final DefaultFactHandle handle1 = new DefaultFactHandle( 1,
                                                                 string1 );

        /* should assert as ObjectType matches */
        objectTypeNode.assertObject( handle1,
                                     context,
                                     workingMemory );
        /* check asserted object was added to memory */
        final PrimitiveLongMap memory = (PrimitiveLongMap) workingMemory.getNodeMemory( objectTypeNode );
        assertEquals( 1,
                      memory.size() );

        /* should retract as ObjectType matches */
        objectTypeNode.retractObject( handle1,
                                      context,
                                      workingMemory );
        /* check asserted object was removed from memory */
        assertEquals( 0,
                      memory.size() );

        /* make sure its just the handle1 for string1 that was propagated */
        final List retracted = sink.getRetracted();
        assertLength( 1,
                      retracted );
        assertSame( handle1,
                    ((Object[]) retracted.get( 0 ))[0] );
    }

    public void testUpdateNewNode() throws FactException {
        // Tests that when new child is added only the last added child is
        // updated
        // When the attachingNewNode flag is set
        final PropagationContext context = new PropagationContextImpl( 0,
                                                                       PropagationContext.ASSERTION,
                                                                       null,
                                                                       null );

        final ReteooWorkingMemory workingMemory = new ReteooWorkingMemory( new ReteooRuleBase() );

        final Rete source = new Rete();

        final ObjectTypeNode objectTypeNode = new ObjectTypeNode( 1,
                                                                  new ClassObjectType( String.class ),
                                                                  source );

        final MockObjectSink sink1 = new MockObjectSink();
        objectTypeNode.addObjectSink( sink1 );

        final Object string1 = "cheese";

        final Object string2 = "bread";

        final DefaultFactHandle handle1 = new DefaultFactHandle( 1,
                                                                 string1 );
        final DefaultFactHandle handle2 = new DefaultFactHandle( 2,
                                                                 string2 );

        objectTypeNode.assertObject( handle1,
                                     context,
                                     workingMemory );

        objectTypeNode.assertObject( handle2,
                                     context,
                                     workingMemory );

        assertLength( 2,
                      sink1.getAsserted() );

        objectTypeNode.attachingNewNode = true;

        final MockObjectSink sink2 = new MockObjectSink();
        objectTypeNode.addObjectSink( sink2 );

        assertLength( 0,
                      sink2.getAsserted() );

        objectTypeNode.updateNewNode( workingMemory,
                                      null );

        objectTypeNode.attachingNewNode = false;

        assertLength( 2,
                      sink1.getAsserted() );
        assertLength( 2,
                      sink2.getAsserted() );

        final Object string3 = "water";

        final DefaultFactHandle handle3 = new DefaultFactHandle( 3,
                                                                 string3 );

        objectTypeNode.assertObject( handle3,
                                     context,
                                     workingMemory );

        assertLength( 3,
                      sink1.getAsserted() );

        assertLength( 3,
                      sink2.getAsserted() );

    }

}