1 /*
2  * Copyright 2018 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 package com.android.tv.common.singletons;
17 
18 import android.content.Context;
19 
20 /**
21  * A type that can know about and supply a singleton, typically a type t such as an android activity
22  * or application.
23  */
24 public interface HasSingletons<C> {
25 
26     @SuppressWarnings("unchecked") // injection
get(Class<C> clazz, Context context)27     static <C> C get(Class<C> clazz, Context context) {
28         return ((HasSingletons<C>) context).singletons();
29     }
30 
31     /** Returns the strongly typed singleton. */
singletons()32     C singletons();
33 }
34