de.dfki.iui.mmds.scxml.engine.events.SCXMLOnTransitionEvent.java Source code

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Here is the source code for de.dfki.iui.mmds.scxml.engine.events.SCXMLOnTransitionEvent.java

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/*******************************************************************************
 * The Creative Commons CC-BY-NC 4.0 License
 * http://creativecommons.org/licenses/by-nc/4.0/legalcode
 *
 * Creative Commons (CC) by DFKI GmbH
 * - Vanessa Hahn <Vanessa.Hahn@dfki.de>
 * - Robert Nesselrath <rnesselrath@gmail.com>
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 *******************************************************************************/
package de.dfki.iui.mmds.scxml.engine.events;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.scxml.model.Transition;
import org.apache.commons.scxml.model.TransitionTarget;
import org.osgi.service.event.EventConstants;

public class SCXMLOnTransitionEvent extends SCXMLEvent {
    public static final String FROM = "from", TO = "to", TRANSITION = "transition", CONDITION = "condition",
            ID = "id", TOPIC_SUFFIX = "/onTransition";

    /**
     * @param id - The id of the Scxml engine that sends an <code>SCXMLOnTransitionEvent</code>.
     * @return The topic containing the id and the static suffix of an <code>SCXMLOnTransitionEvent</code>.
     */
    public static String getTopic(String id) {
        return getTopic(id, TOPIC_SUFFIX);
    }

    public SCXMLOnTransitionEvent(String id, TransitionTarget from, TransitionTarget to, Transition transition) {
        super(getTopic(id), getMap(id, from, to, transition));
    }

    private static Map<String, Object> getMap(String id, TransitionTarget from, TransitionTarget to,
            Transition transition) {
        Map<String, Object> properties = new HashMap<String, Object>(6);
        properties.put(FROM, from.getId());
        properties.put(TO, to.getId());
        properties.put(TRANSITION, transition.getEvent());
        properties.put(CONDITION, transition.getCond());
        properties.put(ID, id);
        properties.put(EventConstants.TIMESTAMP, System.currentTimeMillis());
        return properties;
    }

    public String getScxmlId() {
        return (String) getProperty(ID);
    }

    public String getSourceId() {
        return (String) getProperty(FROM);
    }

    public String getEvent() {
        return (String) getProperty(TRANSITION);
    }

    public String getCondition() {
        return (String) getProperty(CONDITION);
    }

}