spring-data-elasticsearch ElasticsearchRepositoryMetadata 源码
spring-data-elasticsearch ElasticsearchRepositoryMetadata 代码
文件路径：/src/main/java/org/springframework/data/elasticsearch/repository/support/ElasticsearchRepositoryMetadata.java
/*
* Copyright 2020-2022 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.elasticsearch.repository.support;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.util.Collection;
import java.util.stream.Stream;
import org.springframework.data.elasticsearch.core.SearchHit;
import org.springframework.data.repository.core.support.DefaultRepositoryMetadata;
/**
* @author Peter-Josef Meisch
* @since 4.0
*/
public class ElasticsearchRepositoryMetadata extends DefaultRepositoryMetadata {
public ElasticsearchRepositoryMetadata(Class<?> repositoryInterface) {
super(repositoryInterface);
}
@Override
public Class<?> getReturnedDomainClass(Method method) {
Class<?> returnedDomainClass = super.getReturnedDomainClass(method);
if (SearchHit.class.isAssignableFrom(returnedDomainClass)) {
try {
// dealing with Collection<SearchHit<T>> or Flux<SearchHit<T>>, getting to T
ParameterizedType methodGenericReturnType = ((ParameterizedType) method.getGenericReturnType());
if (isAllowedGenericType(methodGenericReturnType)) {
ParameterizedType collectionTypeArgument = (ParameterizedType) methodGenericReturnType
.getActualTypeArguments()[0];
if (SearchHit.class.isAssignableFrom((Class<?>) collectionTypeArgument.getRawType())) {
returnedDomainClass = (Class<?>) collectionTypeArgument.getActualTypeArguments()[0];
}
}
} catch (Exception ignored) {}
}
return returnedDomainClass;
}
protected boolean isAllowedGenericType(ParameterizedType methodGenericReturnType) {
return Collection.class.isAssignableFrom((Class<?>) methodGenericReturnType.getRawType())
|| Stream.class.isAssignableFrom((Class<?>) methodGenericReturnType.getRawType());
}
}
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