com.webull.openapi.utils.CollectionUtils Maven / Gradle / Ivy

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/*
 * Copyright 2022 Webull
 *
 * 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 com.webull.openapi.utils;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;

public final class CollectionUtils {

    private CollectionUtils() {}

    public static boolean isEmpty(Collection collection) {
        return (collection == null || collection.isEmpty());
    }

    public static boolean isNotEmpty(Collection collection) {
        return !CollectionUtils.isEmpty(collection);
    }

    public static boolean isEmpty(Map map) {
        return (map == null || map.isEmpty());
    }

    public static boolean isNotEmpty(Map map) {
        return !CollectionUtils.isEmpty(map);
    }

    public static  HashSet newHashSet(E... elements) {
        HashSet set = new HashSet<>(elements.length);
        Collections.addAll(set, elements);
        return set;
    }
}