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Spring Data module for Redis
/*
* Copyright 2011-2023 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.support.collections;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.core.RedisOperations;
import org.springframework.data.redis.core.SessionCallback;
import org.springframework.lang.NonNull;
import org.springframework.lang.Nullable;
/**
* Utility class used mainly for type conversion by the default collection implementations. Meant for internal use.
*
* @author Costin Leau
* @author John Blum
*/
public abstract class CollectionUtils {
static Collection extractKeys(Collection stores) {
Collection keys = new ArrayList<>(stores.size());
for (RedisStore store : stores) {
keys.add(store.getKey());
}
return keys;
}
public static List initializeList(@NonNull List list, int size) {
for (int count = 0; count < size; count++) {
list.add(null);
}
return list;
}
@NonNull
public static List nullSafeList(@Nullable List list) {
return list != null ? list : Collections.emptyList();
}
static void rename(final K key, final K newKey, RedisOperations operations) {
operations.execute(new SessionCallback