spring-data-redis CompositeIndexResolver 源码
spring-data-redis CompositeIndexResolver 代码
文件路径：/src/main/java/org/springframework/data/redis/core/convert/CompositeIndexResolver.java
/*
* Copyright 2016-2022 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.redis.core.convert;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.springframework.data.util.TypeInformation;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
/**
* Composite {@link IndexResolver} implementation that iterates over a given collection of delegate
* {@link IndexResolver} instances. <br />
* <br />
* <strong>NOTE</strong> {@link IndexedData} created by an {@link IndexResolver} can be overwritten by subsequent
* {@link IndexResolver}.
*
* @author Christoph Strobl
* @since 1.7
*/
public class CompositeIndexResolver implements IndexResolver {
private final List<IndexResolver> resolvers;
/**
* Create new {@link CompositeIndexResolver}.
*
* @param resolvers must not be {@literal null}.
*/
public CompositeIndexResolver(Collection<IndexResolver> resolvers) {
Assert.notNull(resolvers, "Resolvers must not be null");
if (CollectionUtils.contains(resolvers.iterator(), null)) {
throw new IllegalArgumentException("Resolvers must no contain null values");
}
this.resolvers = new ArrayList<>(resolvers);
}
@Override
public Set<IndexedData> resolveIndexesFor(TypeInformation<?> typeInformation, @Nullable Object value) {
if (resolvers.isEmpty()) {
return Collections.emptySet();
}
Set<IndexedData> data = new LinkedHashSet<>();
for (IndexResolver resolver : resolvers) {
data.addAll(resolver.resolveIndexesFor(typeInformation, value));
}
return data;
}
@Override
public Set<IndexedData> resolveIndexesFor(String keyspace, String path, TypeInformation<?> typeInformation,
@Nullable Object value) {
Set<IndexedData> data = new LinkedHashSet<>();
for (IndexResolver resolver : resolvers) {
data.addAll(resolver.resolveIndexesFor(keyspace, path, typeInformation, value));
}
return data;
}
}
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