1 /*
2  * Copyright (C) 2016 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.launcher3.util;
18 
19 /**
20  * Utility class to allow lazy initialization of objects.
21  */
22 public abstract class Provider<T> {
23 
24     /**
25      * Initializes and returns the object. This may contain expensive operations not suitable
26      * to UI thread.
27      */
get()28     public abstract T get();
29 
of(final T value)30     public static <T> Provider<T> of (final T value) {
31         return new Provider<T>() {
32             @Override
33             public T get() {
34                 return value;
35             }
36         };
37     }
38 }
39