/*
* Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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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