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1   /*
2    * Copyright 2006-2013 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.springframework.batch.core.listener;
17  
18  import java.util.List;
19  
20  import org.springframework.batch.core.ItemProcessListener;
21  import org.springframework.batch.core.ItemReadListener;
22  import org.springframework.batch.core.ItemWriteListener;
23  
24  /**
25   * Basic no-op implementation of the {@link ItemReadListener},
26   * {@link ItemProcessListener}, and {@link ItemWriteListener} interfaces. All
27   * are implemented, since it is very common that all may need to be implemented
28   * at once.
29   *
30   * @author Lucas Ward
31   *
32   */
33  public class ItemListenerSupport<I, O> implements ItemReadListener<I>, ItemProcessListener<I, O>, ItemWriteListener<O> {
34  
35  	/*
36  	 * (non-Javadoc)
37  	 *
38  	 * @see org.springframework.batch.core.domain.ItemReadListener#afterRead(java.lang.Object)
39  	 */
40  	@Override
41  	public void afterRead(I item) {
42  	}
43  
44  	/*
45  	 * (non-Javadoc)
46  	 *
47  	 * @see org.springframework.batch.core.domain.ItemReadListener#beforeRead()
48  	 */
49  	@Override
50  	public void beforeRead() {
51  	}
52  
53  	/*
54  	 * (non-Javadoc)
55  	 *
56  	 * @see org.springframework.batch.core.domain.ItemReadListener#onReadError(java.lang.Exception)
57  	 */
58  	@Override
59  	public void onReadError(Exception ex) {
60  	}
61  
62  	/*
63  	 * (non-Javadoc)
64  	 *
65  	 * @see org.springframework.batch.core.ItemProcessListener#afterProcess(java.lang.Object,
66  	 *      java.lang.Object)
67  	 */
68  	@Override
69  	public void afterProcess(I item, O result) {
70  	}
71  
72  	/*
73  	 * (non-Javadoc)
74  	 *
75  	 * @see org.springframework.batch.core.ItemProcessListener#beforeProcess(java.lang.Object)
76  	 */
77  	@Override
78  	public void beforeProcess(I item) {
79  	}
80  
81  	/*
82  	 * (non-Javadoc)
83  	 *
84  	 * @see org.springframework.batch.core.ItemProcessListener#onProcessError(java.lang.Object,
85  	 *      java.lang.Exception)
86  	 */
87  	@Override
88  	public void onProcessError(I item, Exception e) {
89  	}
90  
91  	/*
92  	 * (non-Javadoc)
93  	 *
94  	 * @see org.springframework.batch.core.domain.ItemWriteListener#afterWrite()
95  	 */
96  	@Override
97  	public void afterWrite(List<? extends O> item) {
98  	}
99  
100 	/*
101 	 * (non-Javadoc)
102 	 *
103 	 * @see org.springframework.batch.core.domain.ItemWriteListener#beforeWrite(java.lang.Object)
104 	 */
105 	@Override
106 	public void beforeWrite(List<? extends O> item) {
107 	}
108 
109 	/*
110 	 * (non-Javadoc)
111 	 *
112 	 * @see org.springframework.batch.core.domain.ItemWriteListener#onWriteError(java.lang.Exception,
113 	 *      java.lang.Object)
114 	 */
115 	@Override
116 	public void onWriteError(Exception ex, List<? extends O> item) {
117 	}
118 }