java.util.UnsafeArrayList Maven / Gradle / Ivy
/*
* Copyright (C) 2011 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 java.util;
import java.lang.reflect.Array;
/**
* An array-backed list that exposes its array.
*
* @hide
*/
public class UnsafeArrayList extends AbstractList {
private final Class elementType;
private T[] array;
private int size;
public UnsafeArrayList(Class elementType, int initialCapacity) {
this.array = (T[]) Array.newInstance(elementType, initialCapacity);
this.elementType = elementType;
}
@Override public boolean add(T element) {
if (size == array.length) {
T[] newArray = (T[]) Array.newInstance(elementType, size * 2);
System.arraycopy(array, 0, newArray, 0, size);
array = newArray;
}
array[size++] = element;
++modCount;
return true;
}
public T[] array() {
return array;
}
public T get(int i) {
return array[i];
}
public int size() {
return size;
}
}