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