001/**
002 *
003 * Copyright 2015 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smack.util;
018
019import java.util.Collection;
020
021public class CollectionUtil {
022
023    public static <T> Collection<T> requireNotEmpty(Collection<T> collection, String collectionName) {
024        if (collection == null) {
025            throw new NullPointerException(collectionName + " must not be null.");
026        }
027        if (collection.isEmpty()) {
028            throw new IllegalArgumentException(collectionName + " must not be empty.");
029        }
030        return collection;
031    }
032
033}