net.guerlab.cloud.server.utils.BatchSaveUtils Maven / Gradle / Ivy
/*
* Copyright 2018-2024 guerlab.net and other contributors.
*
* Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3 (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.gnu.org/licenses/lgpl-3.0.html
*
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.guerlab.cloud.server.utils;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;
import net.guerlab.commons.collection.CollectionUtil;
/**
* 批量保存工具.
*
* @author guer
*/
public final class BatchSaveUtils {
private BatchSaveUtils() {
}
/**
* 批量保存过滤.
*
* @param collection 待保存集合
* @param filter 批量保存过滤器
* @param 实体类型
* @return 过滤后可保存集合
*/
public static List filter(Collection collection, Function filter) {
if (CollectionUtil.isEmpty(collection)) {
return Collections.emptyList();
}
List list = collection.stream().filter(Objects::nonNull).map(filter).filter(Objects::nonNull)
.collect(Collectors.toList());
return CollectionUtil.isEmpty(list) ? Collections.emptyList() : list;
}
}