| 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.base; |
| 6 | |
| 7 | import java.util.ArrayList; |
| 8 | import java.util.Collections; |
| 9 | import java.util.HashSet; |
| 10 | |
| 11 | /** |
| 12 | * Functions used for easier initialization of Java collections. Inspired by |
| 13 | * functionality in com.google.common.collect in Guava but cherry-picked to |
| 14 | * bare-minimum functionality to avoid bloat. (http://crbug.com/272790 provides |
| 15 | * further details) |
| 16 | */ |
| 17 | public final class CollectionUtil { |
| 18 | private CollectionUtil() {} |
| 19 | |
| 20 | public static <E> HashSet<E> newHashSet(E... elements) { |
| 21 | HashSet<E> set = new HashSet<E>(elements.length); |
| 22 | Collections.addAll(set, elements); |
| 23 | return set; |
| 24 | } |
| 25 | |
| 26 | public static <E> ArrayList<E> newArrayList(E... elements) { |
| 27 | ArrayList<E> list = new ArrayList<E>(elements.length); |
| 28 | Collections.addAll(list, elements); |
| 29 | return list; |
| 30 | } |
| 31 | |
| 32 | public static <E> ArrayList<E> newArrayList(Iterable<E> iterable) { |
| 33 | ArrayList<E> list = new ArrayList<E>(); |
| 34 | for (E element : iterable) |
| 35 | list.add(element); |
| 36 | return list; |
| 37 | } |
| 38 | } |