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
17package com.android.systemui;
18
19import android.content.Context;
20import android.content.res.Configuration;
21
22import java.io.FileDescriptor;
23import java.io.PrintWriter;
24import java.util.Map;
25
26public abstract class SystemUI {
27    public Context mContext;
28    public Map<Class<?>, Object> mComponents;
29
30    public abstract void start();
31
32    protected void onConfigurationChanged(Configuration newConfig) {
33    }
34
35    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
36    }
37
38    protected void onBootCompleted() {
39    }
40
41    @SuppressWarnings("unchecked")
42    public <T> T getComponent(Class<T> interfaceType) {
43        return (T) (mComponents != null ? mComponents.get(interfaceType) : null);
44    }
45
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