001/* 002 * oauth2-oidc-sdk 003 * 004 * Copyright 2012-2016, Connect2id Ltd and contributors. 005 * 006 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use 007 * this file except in compliance with the License. You may obtain a copy of the 008 * License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software distributed 013 * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 014 * CONDITIONS OF ANY KIND, either express or implied. See the License for the 015 * specific language governing permissions and limitations under the License. 016 */ 017 018package com.nimbusds.oauth2.sdk.util; 019 020 021import java.util.Collection; 022 023 024/** 025 * Collection utilities. Replicates Apache Commons Collections. 026 */ 027public final class CollectionUtils { 028 029 030 /** 031 * Returns {@code true} if the specified collection is {@code null} or 032 * empty. 033 * 034 * @param collection The collection. May be {@code null}. 035 * 036 * @return {@code true} if the collection is {@code null} or empty, 037 * else {@code false}. 038 */ 039 public static boolean isEmpty(final Collection<?> collection) { 040 041 return collection == null || collection.isEmpty(); 042 } 043 044 045 /** 046 * Returns {@code true} if the specified collection is not empty. 047 * 048 * @param collection The collection. May be {@code null}. 049 * 050 * @return {@code true} if the collection is not empty, else 051 * {@code false}. 052 */ 053 public static boolean isNotEmpty(final Collection<?> collection) { 054 055 return collection != null && ! collection.isEmpty(); 056 } 057 058 059 /** 060 * Prevents public instantiation. 061 */ 062 private CollectionUtils() {} 063}