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1 /*
2  * Copyright (C) 2010 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.systemui;
18 
19 import android.content.Context;
20 import android.content.res.Configuration;
21 
22 import java.io.FileDescriptor;
23 import java.io.PrintWriter;
24 import java.util.Map;
25 
26 public abstract class SystemUI {
27     public Context mContext;
28     public Map<Class<?>, Object> mComponents;
29 
start()30     public abstract void start();
31 
onConfigurationChanged(Configuration newConfig)32     protected void onConfigurationChanged(Configuration newConfig) {
33     }
34 
dump(FileDescriptor fd, PrintWriter pw, String[] args)35     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
36     }
37 
onBootCompleted()38     protected void onBootCompleted() {
39     }
40 
41     @SuppressWarnings("unchecked")
getComponent(Class<T> interfaceType)42     public <T> T getComponent(Class<T> interfaceType) {
43         return (T) (mComponents != null ? mComponents.get(interfaceType) : null);
44     }
45 
putComponent(Class<T> interfaceType, C component)46     public <T, C extends T> void putComponent(Class<T> interfaceType, C component) {
47         if (mComponents != null) {
48             mComponents.put(interfaceType, component);
49         }
50     }
51 }
52