spring-batch MongoItemWriterBuilder 源码
spring-batch MongoItemWriterBuilder 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/data/builder/MongoItemWriterBuilder.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.data.builder;
import org.springframework.batch.item.data.MongoItemWriter;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.util.Assert;
/**
* A builder implementation for the {@link MongoItemWriter}
*
* @author Glenn Renfro
* @since 4.0
* @see MongoItemWriter
*/
public class MongoItemWriterBuilder<T> {
private MongoOperations template;
private String collection;
private boolean delete = false;
/**
* Indicates if the items being passed to the writer are to be saved or removed from
* the data store. If set to false (default), the items will be saved. If set to true,
* the items will be removed.
* @param delete removal indicator
* @return The current instance of the builder
* @see MongoItemWriter#setDelete(boolean)
*/
public MongoItemWriterBuilder<T> delete(boolean delete) {
this.delete = delete;
return this;
}
/**
* Set the {@link MongoOperations} to be used to save items to be written.
* @param template the template implementation to be used.
* @return The current instance of the builder
* @see MongoItemWriter#setTemplate(MongoOperations)
*/
public MongoItemWriterBuilder<T> template(MongoOperations template) {
this.template = template;
return this;
}
/**
* Set the name of the Mongo collection to be written to.
* @param collection the name of the collection.
* @return The current instance of the builder
* @see MongoItemWriter#setCollection(String)
*
*/
public MongoItemWriterBuilder<T> collection(String collection) {
this.collection = collection;
return this;
}
/**
* Validates and builds a {@link MongoItemWriter}.
* @return a {@link MongoItemWriter}
*/
public MongoItemWriter<T> build() {
Assert.notNull(this.template, "template is required.");
MongoItemWriter<T> writer = new MongoItemWriter<>();
writer.setTemplate(this.template);
writer.setDelete(this.delete);
writer.setCollection(this.collection);
return writer;
}
}
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