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.gallery3d.util;
18 
19 // This is an array whose index ranges from min to max (inclusive).
20 public class RangeArray<T> {
21     private T[] mData;
22     private int mOffset;
23 
RangeArray(int min, int max)24     public RangeArray(int min, int max) {
25         mData = (T[]) new Object[max - min + 1];
26         mOffset = min;
27     }
28 
29     // Wraps around an existing array
RangeArray(T[] src, int min, int max)30     public RangeArray(T[] src, int min, int max) {
31         if (max - min + 1 != src.length) {
32             throw new AssertionError();
33         }
34         mData = src;
35         mOffset = min;
36     }
37 
put(int i, T object)38     public void put(int i, T object) {
39         mData[i - mOffset] = object;
40     }
41 
get(int i)42     public T get(int i) {
43         return mData[i - mOffset];
44     }
45 
indexOf(T object)46     public int indexOf(T object) {
47         for (int i = 0; i < mData.length; i++) {
48             if (mData[i] == object) return i + mOffset;
49         }
50         return Integer.MAX_VALUE;
51     }
52 }
53