org.drools.reteoo.nodes.ReteAlphaNode Maven / Gradle / Ivy

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/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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.
*/

package org.drools.reteoo.nodes;

import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.common.PropagationContextFactory;
import org.drools.core.reteoo.AlphaNode;
import org.drools.core.reteoo.ObjectSource;
import org.drools.core.reteoo.builder.BuildContext;
import org.drools.core.spi.AlphaNodeFieldConstraint;
import org.drools.core.spi.PropagationContext;

public class ReteAlphaNode extends AlphaNode {
    public ReteAlphaNode() {
    }

    public ReteAlphaNode(int id, AlphaNodeFieldConstraint constraint, ObjectSource objectSource, BuildContext context) {
        super(id, constraint, objectSource, context);
    }

    public void attach(BuildContext context) {
        super.attach(context);
        if (context == null ) {
            return;
        }

        for ( InternalWorkingMemory workingMemory : context.getWorkingMemories() ) {
            PropagationContextFactory pctxFactory = workingMemory.getKnowledgeBase().getConfiguration().getComponentFactory().getPropagationContextFactory();
            final PropagationContext propagationContext = pctxFactory.createPropagationContext(workingMemory.getNextPropagationIdCounter(), PropagationContext.Type.RULE_ADDITION,
                                                                                               null, null, null);
            this.source.updateSink( this,
                                    propagationContext,
                                    workingMemory );
        }
    }
}