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diff --git a/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java b/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java
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+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.utils;
+
+import android.util.SparseArray;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import java.util.WeakHashMap;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+public final class CollectionUtils {
+ private CollectionUtils() {
+ // This utility class is not publicly instantiable.
+ }
+
+ public static <K,V> HashMap<K,V> newHashMap() {
+ return new HashMap<K,V>();
+ }
+
+ public static <K, V> WeakHashMap<K, V> newWeakHashMap() {
+ return new WeakHashMap<K, V>();
+ }
+
+ public static <K,V> TreeMap<K,V> newTreeMap() {
+ return new TreeMap<K,V>();
+ }
+
+ public static <K, V> Map<K,V> newSynchronizedTreeMap() {
+ final TreeMap<K,V> treeMap = newTreeMap();
+ return Collections.synchronizedMap(treeMap);
+ }
+
+ public static <K,V> ConcurrentHashMap<K,V> newConcurrentHashMap() {
+ return new ConcurrentHashMap<K,V>();
+ }
+
+ public static <E> HashSet<E> newHashSet() {
+ return new HashSet<E>();
+ }
+
+ public static <E> TreeSet<E> newTreeSet() {
+ return new TreeSet<E>();
+ }
+
+ public static <E> ArrayList<E> newArrayList() {
+ return new ArrayList<E>();
+ }
+
+ public static <E> ArrayList<E> newArrayList(final int initialCapacity) {
+ return new ArrayList<E>(initialCapacity);
+ }
+
+ public static <E> ArrayList<E> newArrayList(final Collection<E> collection) {
+ return new ArrayList<E>(collection);
+ }
+
+ public static <E> LinkedList<E> newLinkedList() {
+ return new LinkedList<E>();
+ }
+
+ public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList() {
+ return new CopyOnWriteArrayList<E>();
+ }
+
+ public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(
+ final Collection<E> collection) {
+ return new CopyOnWriteArrayList<E>(collection);
+ }
+
+ public static <E> CopyOnWriteArrayList<E> newCopyOnWriteArrayList(final E[] array) {
+ return new CopyOnWriteArrayList<E>(array);
+ }
+
+ public static <E> SparseArray<E> newSparseArray() {
+ return new SparseArray<E>();
+ }
+}