Transition.java

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 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License,
 * v. 2.0 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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 */
package org.restcomm.fsm;

/**
 *
 * @author kulikov
 */
public class Transition implements Runnable {

    private String name;
    protected State destination;
    
    private TransitionHandler handler;
    private State state;
    
    protected Transition(String name, State destination) {
        this.name = name;
        this.destination = destination;
    }
    
    public String getName() {
        return name;
    }
    
    public void setHandler(TransitionHandler handler) {
        this.handler = handler;
    }
    
    protected State process(State state) {
        this.state = state;
        //leave current state
        state.leave();
        
        run();
        
        //enter to the destination
        this.destination.enter();
        return this.destination;
    }
    
    @Override
    public String toString() {
        return name;
    }

    public void run() {
        
        //invoke handler if assigned
        if (handler != null) {
            handler.process(state);
        }
        
    }
}