1 /*
   2  * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.corba.se.spi.orbutil.fsm ;
  27 
  28 import com.sun.corba.se.impl.orbutil.fsm.NameBase ;
  29 
  30 import java.util.Map ;
  31 import java.util.HashMap ;
  32 import java.util.Set ;
  33 import java.util.HashSet ;
  34 
  35 import com.sun.corba.se.impl.orbutil.fsm.GuardedAction ;
  36 import com.sun.corba.se.impl.orbutil.fsm.NameBase ;
  37 
  38 /** Base class for all states in a StateEngine.  This must be used
  39 * as the base class for all states in transitions added to a StateEngine.
  40 */
  41 public class StateImpl extends NameBase implements State {
  42     private Action defaultAction ;
  43     private State defaultNextState ;
  44     private Map inputToGuardedActions ;
  45 
  46     public StateImpl( String name )
  47     {
  48         super( name ) ;
  49         defaultAction = null ;
  50         inputToGuardedActions = new HashMap() ;
  51     }
  52 
  53     public void preAction( FSM fsm )
  54     {
  55     }
  56 
  57     public void postAction( FSM fsm )
  58     {
  59     }
  60 
  61     // Methods for use only by StateEngineImpl.
  62 
  63     public State getDefaultNextState()
  64     {
  65         return defaultNextState ;
  66     }
  67 
  68     public void setDefaultNextState( State defaultNextState )
  69     {
  70         this.defaultNextState = defaultNextState ;
  71     }
  72 
  73     public Action getDefaultAction()
  74     {
  75         return defaultAction ;
  76     }
  77 
  78     public void setDefaultAction( Action defaultAction )
  79     {
  80         this.defaultAction = defaultAction ;
  81     }
  82 
  83     public void addGuardedAction( Input in, GuardedAction ga )
  84     {
  85         Set gas = (Set)inputToGuardedActions.get( in ) ;
  86         if (gas == null) {
  87             gas = new HashSet() ;
  88             inputToGuardedActions.put( in, gas ) ;
  89         }
  90 
  91         gas.add( ga ) ;
  92     }
  93 
  94     public Set getGuardedActions( Input in )
  95     {
  96         return (Set)inputToGuardedActions.get( in ) ;
  97     }
  98 }