/*
* 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.model.op;
import org.jbpm.api.JbpmException;
import org.jbpm.api.model.Event;
import org.jbpm.pvm.internal.job.MessageImpl;
import org.jbpm.pvm.internal.model.ActivityImpl;
import org.jbpm.pvm.internal.model.ExecutionImpl;
import org.jbpm.pvm.internal.model.TransitionImpl;
/**
* @author Tom Baeyens
*/
public class TransitionStartActivity extends AtomicOperation {
private static final long serialVersionUID = 1L;
public boolean isAsync(ExecutionImpl execution) {
return false;
}
public void perform(ExecutionImpl execution) {
TransitionImpl transition = execution.getTransition();
ActivityImpl source = transition.getSource();
ActivityImpl destination = transition.getDestination();
ActivityImpl activity = execution.getActivity();
if (activity==null) {
// find outer most activity to start
activity = destination;
while ( (activity.getParentActivity()!=null)
&& (!activity.getParentActivity().contains(source))
) {
activity = activity.getParentActivity();
}
} else if (activity==destination){
activity = null;
} else {
ActivityImpl parent = activity;
activity = destination;
while ( (activity!=null)
&& (activity.getParent()!=parent)
) {
activity = activity.getParentActivity();
}
if (activity==null) {
throw new JbpmException("implementation bug: couldn't find parent "+parent+" around destination "+destination);
}
}
if (activity==null) {
execution.setTransition(null);
execution.performAtomicOperation(AtomicOperation.EXECUTE_ACTIVITY);
} else {
execution.setActivity(activity);
ExecutionImpl propagatingExecution = execution;
if (activity.isLocalScope()) {
propagatingExecution = execution.createScope(activity);
}
propagatingExecution.fire(Event.START, activity, AtomicOperation.TRANSITION_START_ACTIVITY);
}
}
public MessageImpl<?> createAsyncMessage(ExecutionImpl execution) {
throw new UnsupportedOperationException("please implement me");
}
public String toString() {
return "TransitionStartActivity";
}
}