/*
|
* 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.pvm.internal.model.Activity;
|
import org.jbpm.pvm.internal.model.ExecutionImpl;
|
import org.jbpm.pvm.internal.model.Transition;
|
import org.jbpm.pvm.internal.script.ScriptManager;
|
|
/**
|
* @author Tom Baeyens
|
*/
|
public class DecisionExpressionActivity extends JpdlActivity {
|
|
private static final long serialVersionUID = 1L;
|
|
protected String expression;
|
protected String language;
|
|
public void execute(ActivityExecution execution) {
|
execute((ExecutionImpl) execution);
|
}
|
|
public void execute(ExecutionImpl execution) {
|
Activity activity = execution.getActivity();
|
String transitionName = null;
|
|
ScriptManager scriptManager = ScriptManager.getScriptManager();
|
Object result = scriptManager.evaluateExpression(expression, language);
|
if ( (result!=null)
|
&& (! (result instanceof String))
|
) {
|
throw new JbpmException("expression '"+expression+"' in decision '"+activity.getName()+"' returned "+result.getClass().getName()+" instead of a transitionName (String): "+result);
|
}
|
transitionName = (String) result;
|
|
Transition transition = activity.getOutgoingTransition(transitionName);
|
if (transition==null) {
|
throw new JbpmException("expression '"+expression+"' in decision '"+activity.getName()+"' returned unexisting outgoing transition name: "+transitionName);
|
}
|
|
execution.historyDecision(transitionName);
|
|
execution.take(transition);
|
}
|
|
public void setExpression(String expr) {
|
this.expression = expr;
|
}
|
public void setLanguage(String lang) {
|
this.language = lang;
|
}
|
}
|