1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.inputmethod.latin; 18 19 import android.util.SparseArray; 20 21 import java.util.ArrayList; 22 import java.util.Collection; 23 import java.util.Collections; 24 import java.util.HashMap; 25 import java.util.HashSet; 26 import java.util.LinkedList; 27 import java.util.Map; 28 import java.util.TreeMap; 29 import java.util.TreeSet; 30 import java.util.WeakHashMap; 31 import java.util.concurrent.ConcurrentHashMap; 32 import java.util.concurrent.CopyOnWriteArrayList; 33 34 public final class CollectionUtils { 35 private CollectionUtils() { 36 // This utility class is not publicly instantiable. 37 } 38 39 public static <K,V> HashMap<K,V> newHashMap() { 40 return new HashMap<K,V>(); 41 } 42 43 public static <K, V> WeakHashMap<K, V> newWeakHashMap() { 44 return new WeakHashMap<K, V>(); 45 } 46 47 public static <K,V> TreeMap<K,V> newTreeMap() { 48 return new TreeMap<K,V>(); 49 } 50 51 public static <K, V> Map<K,V> newSynchronizedTreeMap() { 52 final TreeMap<K,V> treeMap = newTreeMap(); 53 return Collections.synchronizedMap(treeMap); 54 } 55 56 public static <K,V> ConcurrentHashMap<K,V> newConcurrentHashMap() { 57 return new ConcurrentHashMap<K,V>(); 58 } 59 60 public static <E> HashSet<E> newHashSet() { 61 return new HashSet<E>(); 62 } 63 64 public static <E> TreeSet<E> newTreeSet() { 65 return new TreeSet<E>(); 66 } 67 68 public static <E> ArrayList<E> newArrayList() { 69 return new ArrayList<E>(); 70 } 71 72 public static <E> ArrayList<E> newArrayList(final int initialCapacity) { 73 return new ArrayList<E>(initialCapacity); 74 } 75 76 public static <E> ArrayList<E> newArrayList(final Collection<E> collection) { 77 return new ArrayList<E>(collection); 78 } 79 80 public static <E> LinkedList<E> newLinkedList() { 81 return new LinkedList<E>(); 82 } 83 84 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList() { 85 return new CopyOnWriteArrayList<E>(); 86 } 87 88 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList( 89 final Collection<E> collection) { 90 return new CopyOnWriteArrayList<E>(collection); 91 } 92 93 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(final E[] array) { 94 return new CopyOnWriteArrayList<E>(array); 95 } 96 97 public static <E> SparseArray<E> newSparseArray() { 98 return new SparseArray<E>(); 99 } 100 } 101
