spring-batch SynchronizedItemStreamReaderBuilder 源码
spring-batch SynchronizedItemStreamReaderBuilder 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/support/builder/SynchronizedItemStreamReaderBuilder.java
/*
* Copyright 2017 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.item.support.builder;
import org.springframework.batch.item.ItemStreamReader;
import org.springframework.batch.item.support.SynchronizedItemStreamReader;
import org.springframework.util.Assert;
/**
* Creates a fully qualified SynchronizedItemStreamReader.
*
* @author Glenn Renfro
* @since 4.0
*/
public class SynchronizedItemStreamReaderBuilder<T> {
private ItemStreamReader<T> delegate;
/**
* The item stream reader to use as a delegate. Items are read from the delegate and
* passed to the caller in
* {@link org.springframework.batch.item.support.SynchronizedItemStreamReader#read()}.
* @param delegate the delegate to set
* @return this instance for method chaining
* @see SynchronizedItemStreamReader#setDelegate(ItemStreamReader)
*/
public SynchronizedItemStreamReaderBuilder<T> delegate(ItemStreamReader<T> delegate) {
this.delegate = delegate;
return this;
}
/**
* Returns a fully constructed {@link SynchronizedItemStreamReader}.
* @return a new {@link SynchronizedItemStreamReader}
*/
public SynchronizedItemStreamReader<T> build() {
Assert.notNull(this.delegate, "A delegate is required");
SynchronizedItemStreamReader<T> reader = new SynchronizedItemStreamReader<>();
reader.setDelegate(this.delegate);
return reader;
}
}
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