spring-batch BatchListenerFactoryHelper 源码
spring-batch BatchListenerFactoryHelper 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/step/factory/BatchListenerFactoryHelper.java
/*
* Copyright 2006-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.batch.core.step.factory;
import java.util.ArrayList;
import java.util.List;
import org.springframework.batch.core.StepListener;
/**
* Package private helper for step factory beans.
*
* @author Dave Syer
*
*/
abstract class BatchListenerFactoryHelper {
public static <T> List<T> getListeners(StepListener[] listeners, Class<? super T> cls) {
List<T> list = new ArrayList<>();
for (StepListener stepListener : listeners) {
if (cls.isAssignableFrom(stepListener.getClass())) {
@SuppressWarnings("unchecked")
T listener = (T) stepListener;
list.add(listener);
}
}
return list;
}
}
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