001/**
002 * Copyright (c) 2025-2026, Michael Yang 杨福海 (fuhai999@gmail.com).
003 * <p>
004 * Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (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.gnu.org/licenses/lgpl-3.0.txt
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 dev.tinyflow.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}