spring-data-jpa JpaPersistableEntityInformation 源码
spring-data-jpa JpaPersistableEntityInformation 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/support/JpaPersistableEntityInformation.java
/*
* Copyright 2011-2022 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.support;
import jakarta.persistence.PersistenceUnitUtil;
import jakarta.persistence.metamodel.Metamodel;
import org.springframework.data.domain.Persistable;
import org.springframework.lang.Nullable;
/**
* Extension of {@link JpaMetamodelEntityInformation} that consideres methods of {@link Persistable} to lookup the id.
*
* @author Oliver Gierke
* @author Christoph Strobl
* @author Mark Paluch
*/
public class JpaPersistableEntityInformation<T extends Persistable<ID>, ID>
extends JpaMetamodelEntityInformation<T, ID> {
/**
* Creates a new {@link JpaPersistableEntityInformation} for the given domain class and {@link Metamodel}.
*
* @param domainClass must not be {@literal null}.
* @param metamodel must not be {@literal null}.
* @param persistenceUnitUtil must not be {@literal null}.
*/
public JpaPersistableEntityInformation(Class<T> domainClass, Metamodel metamodel,
PersistenceUnitUtil persistenceUnitUtil) {
super(domainClass, metamodel, persistenceUnitUtil);
}
@Override
public boolean isNew(T entity) {
return entity.isNew();
}
@Nullable
@Override
public ID getId(T entity) {
return entity.getId();
}
}
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