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