spring-batch JpaQueryProvider 源码
spring-batch JpaQueryProvider 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/orm/JpaQueryProvider.java
/*
* Copyright 2006-2021 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.database.orm;
import jakarta.persistence.EntityManager;
import jakarta.persistence.Query;
import org.springframework.batch.item.ItemReader;
/**
* <p>
* Interface defining the functionality to be provided for generating queries for use with
* JPA {@link ItemReader}s or other custom built artifacts.
* </p>
*
* @author Anatoly Polinsky
* @author Dave Syer
* @author Mahmoud Ben Hassine
* @since 2.1
*
*/
public interface JpaQueryProvider {
/**
* <p>
* Create the query object.
* </p>
* @return created query
*/
public Query createQuery();
/**
* Provide an {@link EntityManager} for the query to be built.
* @param entityManager to be used by the {@link JpaQueryProvider}.
*/
void setEntityManager(EntityManager entityManager);
}
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