?? startstate.java
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/*
* 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.graph.node;
import java.util.Map;
import org.dom4j.Element;
import org.jbpm.graph.def.Event;
import org.jbpm.graph.def.Node;
import org.jbpm.graph.def.Transition;
import org.jbpm.graph.exe.ExecutionContext;
import org.jbpm.jpdl.xml.JpdlXmlReader;
public class StartState extends Node {
private static final long serialVersionUID = 1L;
public StartState() {
}
public StartState(String name) {
super(name);
}
// event types //////////////////////////////////////////////////////////////
public static final String[] supportedEventTypes = new String[]{
Event.EVENTTYPE_NODE_LEAVE,
Event.EVENTTYPE_AFTER_SIGNAL
};
public String[] getSupportedEventTypes() {
return supportedEventTypes;
}
// xml //////////////////////////////////////////////////////////////////////
public void read(Element startStateElement, JpdlXmlReader jpdlReader) {
// if the start-state has a task specified,
Element startTaskElement = startStateElement.element("task");
if (startTaskElement!=null) {
// delegate the parsing of the start-state task to the jpdlReader
jpdlReader.readStartStateTask(startTaskElement, this);
}
}
public void write(Element nodeElement) {
}
public void leave(ExecutionContext executionContext, Transition transition) {
// leave this node as usual
super.leave(executionContext, transition);
}
public void execute(ExecutionContext executionContext) {
}
public Transition addArrivingTransition(Transition t) {
throw new UnsupportedOperationException( "illegal operation : its not possible to add a transition that is arriving in a start state" );
}
public void setArrivingTransitions(Map arrivingTransitions) {
if ( (arrivingTransitions!=null)
&& (arrivingTransitions.size()>0)) {
throw new UnsupportedOperationException( "illegal operation : its not possible to set a non-empty map in the arriving transitions of a start state" );
}
}
}
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