/*
* Copyright 2010 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.
* 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.
*/
package org.drools.core.reteoo.builder;
import org.drools.core.reteoo.EntryPointNode;
import org.drools.core.rule.EntryPointId;
import org.drools.core.rule.RuleConditionElement;
/**
* This is a builder for the entry point pattern
* source.
*/
public class EntryPointBuilder
implements
ReteooComponentBuilder {
/* (non-Javadoc)
* @see org.kie.reteoo.builder.ReteooComponentBuilder#build(org.kie.reteoo.builder.BuildContext, org.kie.reteoo.builder.BuildUtils, org.kie.rule.RuleConditionElement)
*/
public void build(BuildContext context,
BuildUtils utils,
RuleConditionElement rce) {
final EntryPointId entry = (EntryPointId) rce;
context.setCurrentEntryPoint( entry );
EntryPointNode epn = context.getKnowledgeBase().getRete().getEntryPointNode( entry );
if( epn == null ) {
NodeFactory nFactory = context.getComponentFactory().getNodeFactoryService();
context.setObjectSource( utils.attachNode( context,
nFactory.buildEntryPointNode( context.getNextId(),
context.getKnowledgeBase().getRete(),
context ) ) );
} else {
context.setObjectSource( epn );
}
}
/* (non-Javadoc)
* @see org.kie.reteoo.builder.ReteooComponentBuilder#requiresLeftActivation(org.kie.reteoo.builder.BuildUtils, org.kie.rule.RuleConditionElement)
*/
public boolean requiresLeftActivation(BuildUtils utils,
RuleConditionElement rce) {
return true;
}
}