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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License.
18   *
19   */
20  package org.apache.mina.statemachine.transition;
21  
22  import org.apache.mina.statemachine.State;
23  import org.apache.mina.statemachine.event.Event;
24  
25  /**
26   * {@link Transition} implementation which does nothing but change the state.
27   *
28   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
29   */
30  public class NoopTransition extends AbstractTransition {
31  
32      /**
33       * Creates a new instance which will loopback to the same {@link State} 
34       * for the specified {@link Event} id.
35       * 
36       * @param eventId the {@link Event} id.
37       */
38      public NoopTransition(Object eventId) {
39          super(eventId);
40      }
41  
42      /**
43       * Creates a new instance with the specified {@link State} as next state 
44       * and for the specified {@link Event} id.
45       * 
46       * @param eventId the {@link Event} id.
47       * @param nextState the next {@link State}.
48       */
49      public NoopTransition(Object eventId, State nextState) {
50          super(eventId, nextState);
51      }
52  
53      protected boolean doExecute(Event event) {
54          return true;
55      }
56  
57  }