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.utils;
18 
19 import java.util.ArrayList;
20 import java.util.Collections;
21 import java.util.Map;
22 import java.util.TreeMap;
23 
24 public final class CollectionUtils {
CollectionUtils()25     private CollectionUtils() {
26         // This utility class is not publicly instantiable.
27     }
28 
arrayAsList(final E[] array, final int start, final int end)29     public static <E> ArrayList<E> arrayAsList(final E[] array, final int start, final int end) {
30         if (array == null) {
31             throw new NullPointerException();
32         }
33         if (start < 0 || start > end || end > array.length) {
34             throw new IllegalArgumentException();
35         }
36 
37         final ArrayList<E> list = new ArrayList<>(end - start);
38         for (int i = start; i < end; i++) {
39             list.add(array[i]);
40         }
41         return list;
42     }
43 }
44