plusone-commons/src/main/java/xyz/zhouxy/plusone/commons/collection/CollectionTools.java

/*
 * Copyright 2023-2024 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 xyz.zhouxy.plusone.commons.collection;

import java.util.Collection;
import java.util.Map;

import javax.annotation.Nullable;

public class CollectionTools {

    // isEmpty

    public static boolean isEmpty(@Nullable Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

    public static boolean isEmpty(@Nullable Map<?, ?> map) {
        return map == null || map.isEmpty();
    }

    // isNotEmpty

    public static boolean isNotEmpty(@Nullable Collection<?> collection) {
        return collection != null && !collection.isEmpty();
    }

    public static boolean isNotEmpty(@Nullable Map<?, ?> map) {
        return map != null && !map.isEmpty();
    }

    private CollectionTools() {
        throw new IllegalStateException("Utility class");
    }
}