001 /* 002 * Copyright 2005 Stephen J. McConnell. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 013 * implied. 014 * 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package net.dpml.state; 020 021 /** 022 * Interface describing a transition that may be performed under an activate 023 * state. 024 * 025 * @author <a href="http://www.dpml.net">Digital Product Management Library</a> 026 * @version 2.1.1 027 */ 028 public interface Transition extends Action 029 { 030 /** 031 * Set the state that this transition is a part of. 032 * @param state the owning state 033 */ 034 void setState( State state ); 035 036 /** 037 * Return the state that this transition is a part of. 038 * @return the owning state 039 */ 040 State getState(); 041 042 /** 043 * Return the transition target state name 044 * @return the target state name 045 */ 046 String getTargetName(); 047 048 /** 049 * Return an operation associated with the transition. 050 * @return a possibly null operation 051 */ 052 Operation getOperation(); 053 }