| /* |
| * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.corba.se.spi.orbutil.fsm ; |
| |
| /** |
| * An FSM is used to represent an instance of a finite state machine |
| * which has a transition function represented by an instance of |
| * StateEngine. An instance of an FSM may be created either by calling |
| * StateEngine.makeFSM( startState ) on a state engine, or by extending FSMImpl and |
| * using a constructor. Using FSMImpl as a base class is convenient if |
| * additional state is associated with the FSM beyond that encoded |
| * by the current state. This is especially convenient if an action |
| * needs some additional information. For example, counters are best |
| * handled by special actions rather than encoding a bounded counter |
| * in a state machine. It is also possible to create a class that |
| * implements the FSM interface by delegating to an FSM instance |
| * created by StateEngine.makeFSM. |
| * |
| * @author Ken Cavanaugh |
| */ |
| public interface FSM |
| { |
| /** Get the current state of this FSM. |
| */ |
| public State getState() ; |
| |
| /** Perform the action and transition to the next state based |
| * on the current state of the FSM and the input. |
| */ |
| public void doIt( Input in ) ; |
| } |
| |
| // end of FSM.java |