spring-graphql RepositoryUtils 源码
spring-graphql RepositoryUtils 代码
文件路径：/spring-graphql/src/main/java/org/springframework/graphql/data/query/RepositoryUtils.java
/*
* Copyright 2002-2021 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.graphql.data.query;
import java.lang.reflect.Type;
import org.springframework.core.ResolvableType;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.core.annotation.MergedAnnotations;
import org.springframework.data.repository.NoRepositoryBean;
import org.springframework.data.repository.Repository;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.data.repository.core.support.DefaultRepositoryMetadata;
import org.springframework.graphql.data.GraphQlRepository;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Utility methods to get information for Spring Data repositories.
*
* @author Rossen Stoyanchev
* @since 1.0.0
*/
class RepositoryUtils {
@SuppressWarnings("unchecked")
public static <T> Class<T> getDomainType(Object executor) {
return (Class<T>) getRepositoryMetadata(executor).getDomainType();
}
public static RepositoryMetadata getRepositoryMetadata(Object executor) {
Assert.isInstanceOf(Repository.class, executor);
Type[] genericInterfaces = executor.getClass().getGenericInterfaces();
for (Type genericInterface : genericInterfaces) {
Class<?> rawClass = ResolvableType.forType(genericInterface).getRawClass();
if (rawClass == null || MergedAnnotations.from(rawClass).isPresent(NoRepositoryBean.class)) {
continue;
}
if (Repository.class.isAssignableFrom(rawClass)) {
return new DefaultRepositoryMetadata(rawClass);
}
}
throw new IllegalArgumentException(
String.format("Cannot resolve repository interface from %s", executor));
}
@Nullable
public static String getGraphQlTypeName(Object repository) {
GraphQlRepository annotation =
AnnotatedElementUtils.findMergedAnnotation(repository.getClass(), GraphQlRepository.class);
if (annotation == null) {
return null;
}
return (StringUtils.hasText(annotation.typeName()) ?
annotation.typeName() : RepositoryUtils.getDomainType(repository).getSimpleName());
}
}
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