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());
}
}
}