spring-data-jpa JpaClassUtils 源码
spring-data-jpa JpaClassUtils 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/provider/JpaClassUtils.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.provider;
import jakarta.persistence.EntityManager;
import jakarta.persistence.metamodel.Metamodel;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
/**
* Utility class to work with classes.
*
* @author Oliver Gierke
* @author Christoph Strobl
* @author Jens Schauder
*/
abstract class JpaClassUtils {
/**
* Private constructor to prevent instantiation.
*/
private JpaClassUtils() {}
/**
* Returns whether the given {@link EntityManager} is of the given type.
*
* @param em must not be {@literal null}.
* @param type the fully qualified expected {@link EntityManager} type, must not be {@literal null} or empty.
* @return whether the given {@code EntityManager} is of the given type.
*/
public static boolean isEntityManagerOfType(EntityManager em, String type) {
EntityManager entityManagerToUse = em;
Object delegate = em.getDelegate();
if (delegate instanceof EntityManager) {
entityManagerToUse = (EntityManager) delegate;
}
return isOfType(entityManagerToUse, type, entityManagerToUse.getClass().getClassLoader());
}
public static boolean isMetamodelOfType(Metamodel metamodel, String type) {
return isOfType(metamodel, type, metamodel.getClass().getClassLoader());
}
private static boolean isOfType(Object source, String typeName, @Nullable ClassLoader classLoader) {
Assert.notNull(source, "Source instance must not be null");
Assert.hasText(typeName, "Target type name must not be null or empty");
try {
return ClassUtils.forName(typeName, classLoader).isInstance(source);
} catch (Exception e) {
return false;
}
}
}
相关信息
相关文章
spring-data-jpa HibernateJpaParametersParameterAccessor 源码
spring-data-jpa HibernateUtils 源码
spring-data-jpa PersistenceProvider 源码
spring-data-jpa ProxyIdAccessor 源码
spring-data-jpa QueryComment 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦