/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.wire.usercode;
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import java.io.Serializable;
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import org.jbpm.api.Execution;
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import org.jbpm.pvm.internal.model.ActivityImpl;
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import org.jbpm.pvm.internal.model.ExecutionImpl;
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import org.jbpm.pvm.internal.model.ProcessDefinitionImpl;
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import org.jbpm.pvm.internal.model.TransitionImpl;
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import org.jbpm.pvm.internal.util.ReflectUtil;
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import org.jbpm.pvm.internal.wire.Descriptor;
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/**
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* @author Tom Baeyens
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*/
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public class UserCodeReference implements Serializable {
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private static final long serialVersionUID = 1L;
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protected boolean isCached = true;
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protected Object cachedObject;
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protected Descriptor descriptor;
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public Object getObject(Execution execution) {
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return getObject(null, execution);
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}
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public Object getObject(ProcessDefinitionImpl processDefinition) {
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return getObject(processDefinition, null);
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}
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protected Object getObject(ProcessDefinitionImpl processDefinition, Execution execution) {
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if (cachedObject!=null) {
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return cachedObject;
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}
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if (descriptor!=null) {
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if (processDefinition==null) {
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processDefinition = getProcessDefinition(execution);
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}
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Object usedObject = ReflectUtil.instantiateUserCode(descriptor, processDefinition);
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if (isCached) {
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cachedObject = usedObject;
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}
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return usedObject;
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}
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return null;
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}
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protected ProcessDefinitionImpl getProcessDefinition(Execution execution) {
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ProcessDefinitionImpl processDefinition = null;
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ExecutionImpl executionImpl = (ExecutionImpl) execution;
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ActivityImpl activity = executionImpl.getActivity();
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TransitionImpl transition = executionImpl.getTransition();
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if (activity!=null) {
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processDefinition = activity.getProcessDefinition();
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}
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if ( (processDefinition==null)
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&& (transition!=null)
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) {
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processDefinition = transition.getProcessDefinition();
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}
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return processDefinition;
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}
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public void setCached(boolean isCached) {
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this.isCached = isCached;
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}
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public void setDescriptor(Descriptor descriptor) {
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this.descriptor = descriptor;
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}
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public Descriptor getDescriptor() {
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return descriptor;
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}
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}
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