spring-data-jpa DefaultJpaEntityMetadata 源码
spring-data-jpa DefaultJpaEntityMetadata 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/query/DefaultJpaEntityMetadata.java
/*
* Copyright 2013-2022 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.query;
import jakarta.persistence.Entity;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Default implementation for {@link JpaEntityMetadata}.
*
* @author Oliver Gierke
* @author Christoph Strobl
*/
public class DefaultJpaEntityMetadata<T> implements JpaEntityMetadata<T> {
private final Class<T> domainType;
/**
* Creates a new {@link DefaultJpaEntityMetadata} for the given domain type.
*
* @param domainType must not be {@literal null}.
*/
public DefaultJpaEntityMetadata(Class<T> domainType) {
Assert.notNull(domainType, "Domain type must not be null");
this.domainType = domainType;
}
@Override
public Class<T> getJavaType() {
return domainType;
}
@Override
public String getEntityName() {
Entity entity = AnnotatedElementUtils.findMergedAnnotation(domainType, Entity.class);
return null != entity && StringUtils.hasText(entity.name()) ? entity.name() : domainType.getSimpleName();
}
}
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