/*
* 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.jpdl.internal.activity;
import org.jbpm.api.JbpmException;
import org.jbpm.api.activity.ActivityExecution;
import org.jbpm.api.jpdl.DecisionHandler;
import org.jbpm.pvm.internal.env.Environment;
import org.jbpm.pvm.internal.model.Activity;
import org.jbpm.pvm.internal.model.ExecutionImpl;
import org.jbpm.pvm.internal.model.Transition;
import org.jbpm.pvm.internal.wire.Descriptor;
import org.jbpm.pvm.internal.wire.WireContext;
/**
* @author Tom Baeyens
*/
public class DecisionHandlerActivity extends JpdlActivity {
private static final long serialVersionUID = 1L;
protected String decisionHandlerName;
protected DecisionHandler decisionHandler;
public void execute(ActivityExecution execution) {
execute((ExecutionImpl) execution);
}
public void execute(ExecutionImpl execution) {
Activity activity = execution.getActivity();
String transitionName = null;
DecisionHandler usedDecisionHandler = null;
if (decisionHandler!=null) {
usedDecisionHandler = decisionHandler;
} else if (decisionHandlerName!=null) {
Environment environment = Environment.getCurrent();
Object object = environment.get(decisionHandlerName);
if (object==null) {
throw new JbpmException("decision handler for "+activity+" is null");
}
if (! (object instanceof DecisionHandler)) {
throw new JbpmException("handler for decision is not a "+DecisionHandler.class.getName()+": "+object.getClass().getName());
}
usedDecisionHandler = (DecisionHandler) object;
} else {
throw new JbpmException("no decision handler specified");
}
transitionName = usedDecisionHandler.decide(execution);
Transition transition = activity.getOutgoingTransition(transitionName);
if (transition==null) {
throw new JbpmException("handler in decision '"+activity.getName()+"' returned unexisting outgoing transition name: "+transitionName);
}
execution.historyDecision(transitionName);
execution.take(transition);
}
public void setDecisionHandlerName(String decisionHandlerName) {
this.decisionHandlerName = decisionHandlerName;
}
public void setDecisionHandler(DecisionHandler decisionHandler) {
this.decisionHandler = decisionHandler;
}
}