WifiStateMachinePrime.java revision 4569b3880ba8d741d466e2f880f91b29b56d5e18 
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
17package com.android.server.wifi;
18
19import android.os.Message;
20
21import com.android.internal.util.State;
22import com.android.internal.util.StateMachine;
23
24/**
25 * This class provides the implementation for different WiFi operating modes.
26 *
27 * NOTE: The class is a WIP and is in active development.  It is intended to replace the existing
28 * WifiStateMachine.java class when the rearchitecture is complete.
29 */
30public class WifiStateMachinePrime {
31    private static final String TAG = "WifiStateMachinePrime";
32
33    private ModeStateMachine mModeStateMachine;
34
35    WifiStateMachinePrime() {
36        mModeStateMachine = new ModeStateMachine(TAG);
37    }
38
39    private class ModeStateMachine extends StateMachine {
40        // Commands for the state machine.
41        public static final int CMD_START_CLIENT_MODE    = 0;
42        public static final int CMD_START_SCAN_ONLY_MODE = 1;
43        public static final int CMD_START_SOFT_AP_MODE   = 2;
44
45
46        // Create the base modes for WSM.
47        private final State mClientModeState = new ClientModeState();
48        private final State mScanOnlyModeState = new ScanOnlyModeState();
49        private final State mSoftAPModeState = new SoftAPModeState();
50
51        // Create the active versions of the modes for WSM.
52        private final State mClientModeActiveState = new ClientModeActiveState();
53        private final State mScanOnlyModeActiveState = new ScanOnlyModeActiveState();
54        private final State mSoftAPModeActiveState = new SoftAPModeActiveState();
55
56        ModeStateMachine(String name) {
57            super(name);
58
59            // CHECKSTYLE:OFF IndentationCheck
60            addState(mClientModeState);
61              addState(mClientModeActiveState, mClientModeState);
62            addState(mScanOnlyModeState);
63              addState(mScanOnlyModeActiveState, mScanOnlyModeState);
64            addState(mSoftAPModeState);
65              addState(mSoftAPModeActiveState, mSoftAPModeState);
66            // CHECKSTYLE:ON IndentationCheck
67        }
68
69        private String getCurrentMode() {
70            try {
71                return getCurrentState().getName();
72            } catch (NullPointerException e) {
73                // current state is not set
74                return null;
75            }
76        }
77
78        class ClientModeState extends State {
79
80            @Override
81            public boolean processMessage(Message message) {
82                return NOT_HANDLED;
83            }
84
85            @Override
86            public void exit() {
87
88            }
89        }
90
91        class ScanOnlyModeState extends State {
92
93            @Override
94            public boolean processMessage(Message message) {
95                // handle Mode changes and any events requiring setup or restarting services
96
97                return NOT_HANDLED;
98            }
99
100            @Override
101            public void exit() {
102                // tear down running services
103            }
104        }
105
106        class SoftAPModeState extends State {
107
108            @Override
109            public boolean processMessage(Message message) {
110                return NOT_HANDLED;
111            }
112
113            @Override
114            public void exit() {
115            }
116        }
117
118        class ModeActiveState extends State {
119            ActiveModeManager mActiveModeManager;
120
121            @Override
122            public boolean processMessage(Message message) {
123                // handle messages for changing modes here
124                return NOT_HANDLED;
125            }
126
127            @Override
128            public void exit() {
129                // clean up objects from an active state - check with mode handlers to make sure
130                // they are stopping properly.
131                mActiveModeManager.stop();
132            }
133        }
134
135        class ClientModeActiveState extends ModeActiveState {
136            @Override
137            public void enter() {
138                this.mActiveModeManager = new ClientModeManager();
139            }
140        }
141
142        class ScanOnlyModeActiveState extends ModeActiveState {
143            @Override
144            public void enter() {
145                this.mActiveModeManager = new ScanOnlyModeManager();
146            }
147        }
148
149        class SoftAPModeActiveState extends ModeActiveState {
150            @Override
151            public void enter() {
152                // The SoftApManager is not empty at this time, will populate in later CLs.
153                //this.mActiveModeManager = new SoftApManager();
154            }
155        }
156    } // class ModeStateMachine
157}
158