org.jbpm.graph.node.InterleaveEnd.java Source code

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Here is the source code for org.jbpm.graph.node.InterleaveEnd.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.*;
import org.dom4j.Element;
import org.jbpm.graph.def.*;
import org.jbpm.graph.exe.*;
import org.jbpm.jpdl.xml.*;

/**
 * a interleaving end node should have 2 leaving transitions.
 * one with the name 'back' that has the interleaving start node as 
 * destinationNode.  and one with the name 'done' that specifies the 
 * destinationNode in case the interleaving is done.   
 * Alternatively, the back and done transitions can be specified 
 * in this interleave handler.
 */
public class InterleaveEnd extends Node implements Parsable {

    private static final long serialVersionUID = 1L;

    Transition back = null;
    Transition done = null;

    public InterleaveEnd() {
    }

    public InterleaveEnd(String name) {
        super(name);
    }

    public void read(Element element, JpdlXmlReader jpdlReader) {
        // TODO
    }

    public void write(Element element) {
        // TODO
    }

    public void execute(ExecutionContext executionContext) {
        Token token = executionContext.getToken();
        Node interleaveEndNode = token.getNode();
        Collection transitionNames = getInterleaveStart().retrieveTransitionNames(token);
        // if the set is *not* empty
        if (!transitionNames.isEmpty()) {
            // go back to the interleave start handler
            String backTransitionName = "back";
            if (back != null) {
                backTransitionName = back.getName();
            }
            interleaveEndNode.leave(executionContext, backTransitionName);
        } else {
            // leave the to the
            getInterleaveStart().removeTransitionNames(token);
            String doneTransitionName = "done";
            if (done != null) {
                doneTransitionName = done.getName();
            }
            interleaveEndNode.leave(executionContext, doneTransitionName);
        }
    }

    public InterleaveStart getInterleaveStart() {
        return (InterleaveStart) getLeavingTransition("back").getTo();
    }

    public Transition getBack() {
        return back;
    }

    public void setBack(Transition back) {
        this.back = back;
    }

    public Transition getDone() {
        return done;
    }

    public void setDone(Transition done) {
        this.done = done;
    }
}