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