| 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.item; |
| 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 (int i = 0; i < listeners.length; i++) { |
| 34 | StepListener stepListener = listeners[i]; |
| 35 | if (cls.isAssignableFrom(stepListener.getClass())) { |
| 36 | @SuppressWarnings("unchecked") |
| 37 | T listener = (T) stepListener; |
| 38 | list.add(listener); |
| 39 | } |
| 40 | } |
| 41 | return list; |
| 42 | } |
| 43 | |
| 44 | } |