1 /*
2 * Copyright 2006-2007 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.step.factory;
17
18 import java.util.ArrayList;
19 import java.util.List;
20
21 import org.springframework.batch.core.StepListener;
22
23 /**
24 * Package private helper for step factory beans.
25 *
26 * @author Dave Syer
27 *
28 */
29 abstract class BatchListenerFactoryHelper {
30
31 public static <T> List<T> getListeners(StepListener[] listeners, Class<? super T> cls) {
32 List<T> list = new ArrayList<T>();
33 for (StepListener stepListener : listeners) {
34 if (cls.isAssignableFrom(stepListener.getClass())) {
35 @SuppressWarnings("unchecked")
36 T listener = (T) stepListener;
37 list.add(listener);
38 }
39 }
40 return list;
41 }
42
43 }