/protocols/ss7/m3ua/impl/src/main/java/org/mobicents/protocols/ss7/m3ua/impl/fsm/Transition.java

 1/*
 2 * JBoss, Home of Professional Open Source
 3 * Copyright 2011, Red Hat, Inc. and individual contributors
 4 * by the @authors tag. See the copyright.txt in the distribution for a
 5 * full listing of individual contributors.
 6 *
 7 * This is free software; you can redistribute it and/or modify it
 8 * under the terms of the GNU Lesser General Public License as
 9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22
23package org.mobicents.protocols.ss7.m3ua.impl.fsm;
24
25/**
26 * 
27 * @author amit bhayani
28 * @author kulikov
29 * 
30 */
31public class Transition {
32
33	private String name;
34	protected State destination;
35
36	private TransitionHandler handler;
37
38	protected Transition(String name, State destination) {
39		this.name = name;
40		this.destination = destination;
41	}
42
43	public String getName() {
44		return name;
45	}
46
47	public void setHandler(TransitionHandler handler) {
48		this.handler = handler;
49	}
50
51	protected State process(State state) {
52		// leave current state
53		state.leave();
54
55		// new Thread(this).start();
56		if (handler != null) {
57			if (!handler.process(state)) {
58				// If handler couldn't process this transition successfully,
59				// return the old state. But this means the LeaveAction could
60				// have been executed and we are ok with that. Also we call
61				// cancelLeave on State so as to assign back the last timeout
62				// value
63				state.cancelLeave();
64				return state;
65			}
66		}
67
68		// enter to the destination
69		this.destination.enter();
70		return this.destination;
71	}
72
73	@Override
74	public String toString() {
75		return name;
76	}
77}