spring-data-jpa Query 源码
spring-data-jpa Query 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/Query.java
/*
* Copyright 2008-2022 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.data.jpa.repository;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.data.annotation.QueryAnnotation;
/**
* Annotation to declare finder queries directly on repository methods.
*
* @author Oliver Gierke
* @author Thomas Darimont
* @author Christoph Strobl
* @author Greg Turnquist
* @see Modifying
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD, ElementType.ANNOTATION_TYPE })
@QueryAnnotation
@Documented
public @interface Query {
/**
* Defines the JPA query to be executed when the annotated method is called.
*/
String value() default "";
/**
* Defines a special count query that shall be used for pagination queries to lookup the total number of elements for
* a page. If none is configured we will derive the count query from the original query or {@link #countProjection()}
* query if any.
*/
String countQuery() default "";
/**
* Defines the projection part of the count query that is generated for pagination. If neither {@link #countQuery()}
* nor {@link #countProjection()} is configured we will derive the count query from the original query.
*
* @return
* @since 1.6
*/
String countProjection() default "";
/**
* Configures whether the given query is a native one. Defaults to {@literal false}.
*/
boolean nativeQuery() default false;
/**
* The named query to be used. If not defined, a {@link jakarta.persistence.NamedQuery} with name of
* {@code $ domainClass}.${queryMethodName}} will be used.
*/
String name() default "";
/**
* Returns the name of the {@link jakarta.persistence.NamedQuery} to be used to execute count queries when pagination
* is used. Will default to the named query name configured suffixed by {@code .count}.
*
* @see #name()
* @return
*/
String countName() default "";
/**
* Define a {@link QueryRewriter} that should be applied to the query string after the query is fully assembled.
*
* @return
* @since 3.0
*/
Class<? extends QueryRewriter> queryRewriter() default QueryRewriter.IdentityQueryRewriter.class;
}
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