001/* 002 * The contents of this file are subject to the terms of the Common Development and 003 * Distribution License (the License). You may not use this file except in compliance with the 004 * License. 005 * 006 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the 007 * specific language governing permission and limitations under the License. 008 * 009 * When distributing Covered Software, include this CDDL Header Notice in each file and include 010 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL 011 * Header, with the fields enclosed by brackets [] replaced by your own identifying 012 * information: "Portions Copyright [year] [name of copyright owner]". 013 * 014 * Copyright 2014-2015 ForgeRock AS. 015 */ 016package org.opends.server.util; 017 018import java.util.*; 019 020/** 021 * Utility class for {@link Collection}s. 022 */ 023public final class CollectionUtils 024{ 025 026 private CollectionUtils() 027 { 028 // private for utility classes 029 } 030 031 /** 032 * Creates a new {@link ArrayList} with the provided elements. 033 * 034 * @param <E> 035 * the elements' type 036 * @param elements 037 * the elements to add to the new ArrayList 038 * @return a new ArrayList with the provided elements 039 */ 040 public static <E> ArrayList<E> newArrayList(E... elements) 041 { 042 return new ArrayList<>(Arrays.asList(elements)); 043 } 044 045 /** 046 * Creates a new {@link LinkedList} with the provided elements. 047 * 048 * @param <E> 049 * the elements' type 050 * @param elements 051 * the elements to add to the new LinkedList 052 * @return a new LinkedList with the provided elements 053 */ 054 public static <E> LinkedList<E> newLinkedList(E... elements) 055 { 056 return new LinkedList<>(Arrays.asList(elements)); 057 } 058 059 /** 060 * Creates a new {@link HashSet} with the provided elements. 061 * 062 * @param <E> 063 * the elements' type 064 * @param elements 065 * the elements to add to the new HashSet 066 * @return a new HashSet with the provided elements 067 */ 068 public static <E> HashSet<E> newHashSet(E... elements) 069 { 070 return new HashSet<>(Arrays.asList(elements)); 071 } 072 073 /** 074 * Creates a new {@link LinkedHashSet} with the provided elements. 075 * 076 * @param <E> 077 * the elements' type 078 * @param elements 079 * the elements to add to the new LinkedHashSet 080 * @return a new LinkedHashSet with the provided elements 081 */ 082 public static <E> LinkedHashSet<E> newLinkedHashSet(E... elements) 083 { 084 return new LinkedHashSet<>(Arrays.asList(elements)); 085 } 086 087 /** 088 * Creates a new {@link TreeSet} with the provided elements. 089 * 090 * @param <E> 091 * the elements' type 092 * @param elements 093 * the elements to add to the new TreeSet 094 * @return a new TreeSet with the provided elements 095 */ 096 public static <E> TreeSet<E> newTreeSet(E... elements) 097 { 098 return new TreeSet<>(Arrays.asList(elements)); 099 } 100}