001/*
002 *  Copyright (c) 2023-2026, Agents-Flex (fuhai999@gmail.com).
003 *  <p>
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package com.agentsflex.core.util;
017
018import java.util.Collection;
019import java.util.List;
020
021public class CollectionUtil {
022
023    private CollectionUtil() {
024    }
025
026
027    public static <T> boolean noItems(Collection<?> collection) {
028        return collection == null || collection.isEmpty();
029    }
030
031
032    public static boolean hasItems(Collection<?> collection) {
033        return !noItems(collection);
034    }
035
036    public static <T> T firstItem(List<T> list) {
037        if (list == null || list.isEmpty()) {
038            return null;
039        }
040        return list.get(0);
041    }
042
043
044    public static <T> T lastItem(List<T> list) {
045        if (list == null || list.isEmpty()) {
046            return null;
047        }
048        return list.get(list.size() - 1);
049    }
050}