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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.scxml.env;
18  
19  import org.apache.commons.scxml.SCXMLListener;
20  import org.apache.commons.scxml.model.Transition;
21  import org.apache.commons.scxml.model.TransitionTarget;
22  
23  /***
24   * An abstract adapter class for the <code>SXCMLListener</code> interface.
25   * This class exists as a convenience for creating listener objects, and as
26   * such all the methods in this class are empty.
27   *
28   * @since 0.7
29   */
30  public abstract class AbstractSCXMLListener implements SCXMLListener {
31  
32      /***
33       * @see SCXMLListener#onEntry(TransitionTarget)
34       */
35      public void onEntry(final TransitionTarget state) {
36          // empty
37      }
38  
39      /***
40       * @see SCXMLListener#onExit(TransitionTarget)
41       */
42      public void onExit(final TransitionTarget state) {
43          // empty
44      }
45  
46      /***
47  * @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition)
48       */
49      public void onTransition(final TransitionTarget from,
50              final TransitionTarget to, final Transition transition) {
51          // empty
52      }
53  
54  }
55