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.concurrent.ConcurrentHashMap; 31 import java.util.concurrent.CopyOnWriteArrayList; 32 33 public final class CollectionUtils { CollectionUtils()34 private CollectionUtils() { 35 // This utility class is not publicly instantiable. 36 } 37 newHashMap()38 public static <K,V> HashMap<K,V> newHashMap() { 39 return new HashMap<K,V>(); 40 } 41 newTreeMap()42 public static <K,V> TreeMap<K,V> newTreeMap() { 43 return new TreeMap<K,V>(); 44 } 45 newSynchronizedTreeMap()46 public static <K, V> Map<K,V> newSynchronizedTreeMap() { 47 final TreeMap<K,V> treeMap = newTreeMap(); 48 return Collections.synchronizedMap(treeMap); 49 } 50 newConcurrentHashMap()51 public static <K,V> ConcurrentHashMap<K,V> newConcurrentHashMap() { 52 return new ConcurrentHashMap<K,V>(); 53 } 54 newHashSet()55 public static <E> HashSet<E> newHashSet() { 56 return new HashSet<E>(); 57 } 58 newTreeSet()59 public static <E> TreeSet<E> newTreeSet() { 60 return new TreeSet<E>(); 61 } 62 newArrayList()63 public static <E> ArrayList<E> newArrayList() { 64 return new ArrayList<E>(); 65 } 66 newArrayList(final int initialCapacity)67 public static <E> ArrayList<E> newArrayList(final int initialCapacity) { 68 return new ArrayList<E>(initialCapacity); 69 } 70 newArrayList(final Collection<E> collection)71 public static <E> ArrayList<E> newArrayList(final Collection<E> collection) { 72 return new ArrayList<E>(collection); 73 } 74 newLinkedList()75 public static <E> LinkedList<E> newLinkedList() { 76 return new LinkedList<E>(); 77 } 78 newCopyOnWriteArrayList()79 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList() { 80 return new CopyOnWriteArrayList<E>(); 81 } 82 newCopyOnWriteArrayList( final Collection<E> collection)83 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList( 84 final Collection<E> collection) { 85 return new CopyOnWriteArrayList<E>(collection); 86 } 87 newCopyOnWriteArrayList(final E[] array)88 public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(final E[] array) { 89 return new CopyOnWriteArrayList<E>(array); 90 } 91 newSparseArray()92 public static <E> SparseArray<E> newSparseArray() { 93 return new SparseArray<E>(); 94 } 95 } 96