1/*
2 * Copyright (C) 2011 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
17package java.util;
18
19import java.lang.reflect.Array;
20
21/**
22 * An array-backed list that exposes its array.
23 *
24 * @hide
25 */
26public class UnsafeArrayList<T> extends AbstractList<T> {
27    private final Class<T> elementType;
28    private T[] array;
29    private int size;
30
31    public UnsafeArrayList(Class<T> elementType, int initialCapacity) {
32        this.array = (T[]) Array.newInstance(elementType, initialCapacity);
33        this.elementType = elementType;
34    }
35
36    @Override public boolean add(T element) {
37        if (size == array.length) {
38            T[] newArray = (T[]) Array.newInstance(elementType, size * 2);
39            System.arraycopy(array, 0, newArray, 0, size);
40            array = newArray;
41        }
42        array[size++] = element;
43        ++modCount;
44        return true;
45    }
46
47    public T[] array() {
48        return array;
49    }
50
51    public T get(int i) {
52        return array[i];
53    }
54
55    public int size() {
56        return size;
57    }
58}
59