spring-data-jpa ProxyIdAccessor 源码
spring-data-jpa ProxyIdAccessor 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/provider/ProxyIdAccessor.java
/*
* Copyright 2014-2022 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.provider;
import org.springframework.lang.Nullable;
/**
* Interface for a persistence provider specific accessor of identifiers held in proxies.
*
* @author Oliver Gierke
* @author Mark Paluch
*/
public interface ProxyIdAccessor {
/**
* Returns whether the {@link ProxyIdAccessor} should be used for the given entity. Will inspect the entity to see
* whether it is a proxy so that lenient id lookup can be used.
*
* @param entity must not be {@literal null}.
* @return
*/
boolean shouldUseAccessorFor(Object entity);
/**
* Returns the identifier of the given entity by leniently inspecting it for the identifier value.
*
* @param entity must not be {@literal null}.
* @return can be {@literal null}.
*/
@Nullable
Object getIdentifierFrom(Object entity);
}
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