/**
* Copyright 2010 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.
*/
package org.drools.workflow.instance.impl.factory;
import org.drools.definition.process.Node;
import org.drools.runtime.process.NodeInstance;
import org.drools.runtime.process.NodeInstanceContainer;
import org.drools.workflow.instance.WorkflowProcessInstance;
import org.drools.workflow.instance.impl.NodeInstanceFactory;
import org.drools.workflow.instance.impl.NodeInstanceImpl;
public class ReuseNodeFactory implements NodeInstanceFactory {
public final Class<? extends NodeInstance> cls;
public ReuseNodeFactory(Class<? extends NodeInstance> cls){
this.cls = cls;
}
public NodeInstance getNodeInstance(Node node, WorkflowProcessInstance processInstance, NodeInstanceContainer nodeInstanceContainer) {
NodeInstance result = ((org.drools.workflow.instance.NodeInstanceContainer)
nodeInstanceContainer).getFirstNodeInstance( node.getId() );
if (result != null) {
return result;
}
try {
NodeInstanceImpl nodeInstance = (NodeInstanceImpl) cls.newInstance();
nodeInstance.setNodeId(node.getId());
nodeInstance.setNodeInstanceContainer(nodeInstanceContainer);
nodeInstance.setProcessInstance(processInstance);
return nodeInstance;
} catch (Exception e) {
throw new RuntimeException("Unable to instantiate node '"
+ this.cls.getName() + "': " + e.getMessage());
}
}
}