BluetoothOppPreference.java revision ce4d93666275df294cb073fe41de5b85932570a8 
1/*
2 * Copyright (c) 2008-2009, Motorola, Inc.
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Motorola, Inc. nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.android.bluetooth.opp;
34
35import java.util.HashMap;
36
37import android.bluetooth.BluetoothDevice;
38import android.content.Context;
39import android.content.SharedPreferences;
40import android.content.SharedPreferences.Editor;
41import android.util.Log;
42
43/**
44 * This class cache Bluetooth device name and channel locally Its a temp
45 * solution which should be replaced by bluetooth_devices in SettingsProvider
46 */
47public class BluetoothOppPreference {
48    private static final String TAG = "BluetoothOppPreference";
49    private static final boolean D = Constants.DEBUG;
50    private static final boolean V = Constants.VERBOSE;
51
52    private static BluetoothOppPreference INSTANCE;
53
54    /* Used when obtaining a reference to the singleton instance. */
55    private static Object INSTANCE_LOCK = new Object();
56
57    private boolean mInitialized;
58
59    private Context mContext;
60
61    private SharedPreferences mNamePreference;
62
63    private SharedPreferences mChannelPreference;
64
65    private HashMap<String, Integer> mChannels = new HashMap<String, Integer>();
66
67    private HashMap<String, String> mNames = new HashMap<String, String>();
68
69    public static BluetoothOppPreference getInstance(Context context) {
70        synchronized (INSTANCE_LOCK) {
71            if (INSTANCE == null) {
72                INSTANCE = new BluetoothOppPreference();
73            }
74            if (!INSTANCE.init(context)) {
75                return null;
76            }
77            return INSTANCE;
78        }
79    }
80
81    private boolean init(Context context) {
82        if (mInitialized)
83            return true;
84        mInitialized = true;
85
86        // This will be around as long as this process is
87        mContext = context.getApplicationContext();
88
89        mNamePreference = mContext.getSharedPreferences(Constants.BLUETOOTHOPP_NAME_PREFERENCE,
90                Context.MODE_PRIVATE);
91        mChannelPreference = mContext.getSharedPreferences(
92                Constants.BLUETOOTHOPP_CHANNEL_PREFERENCE, Context.MODE_PRIVATE);
93
94        mNames = (HashMap<String, String>) mNamePreference.getAll();
95        mChannels = (HashMap<String, Integer>) mChannelPreference.getAll();
96
97        return true;
98    }
99
100    private String getChannelKey(BluetoothDevice remoteDevice, int uuid) {
101        return remoteDevice.getAddress() + "_" + Integer.toHexString(uuid);
102    }
103
104    public String getName(BluetoothDevice remoteDevice) {
105        if (remoteDevice.getAddress().equals("FF:FF:FF:00:00:00")) {
106            return "localhost";
107        }
108        if (!mNames.isEmpty()) {
109            String name = mNames.get(remoteDevice.getAddress());
110            if (name != null) {
111                return name;
112            }
113        }
114        return null;
115    }
116
117    public int getChannel(BluetoothDevice remoteDevice, int uuid) {
118        String key = getChannelKey(remoteDevice, uuid);
119        if (V) Log.v(TAG, "getChannel " + key);
120        int channel = -1;
121        if (!mChannels.isEmpty()) {
122            channel = mChannels.get(key);
123            if (V) Log.v(TAG, "getChannel for " + remoteDevice + "_" + Integer.toHexString(uuid) +
124                        " as " + channel);
125        }
126        return channel;
127    }
128
129    public void setName(BluetoothDevice remoteDevice, String name) {
130        if (V) Log.v(TAG, "Setname for " + remoteDevice + " to " + name);
131        if (!name.equals(getName(remoteDevice))) {
132            Editor ed = mNamePreference.edit();
133            ed.putString(remoteDevice.getAddress(), name);
134            ed.commit();
135            mNames.put(remoteDevice.getAddress(), name);
136        }
137    }
138
139    public void setChannel(BluetoothDevice remoteDevice, int uuid, int channel) {
140        if (V) Log.v(TAG, "Setchannel for " + remoteDevice + "_" + Integer.toHexString(uuid) + " to "
141                    + channel);
142        if (channel == getChannel(remoteDevice, uuid)) {
143            String key = getChannelKey(remoteDevice, uuid);
144            Editor ed = mChannelPreference.edit();
145            ed.putInt(key, channel);
146            ed.commit();
147            mChannels.put(key, channel);
148        }
149    }
150
151    public void removeName(BluetoothDevice remoteDevice) {
152        Editor ed = mNamePreference.edit();
153        ed.remove(remoteDevice.getAddress());
154        ed.commit();
155        mNames.remove(remoteDevice.getAddress());
156    }
157
158    public void removeChannel(BluetoothDevice remoteDevice, int uuid) {
159        String key = getChannelKey(remoteDevice, uuid);
160        Editor ed = mChannelPreference.edit();
161        ed.remove(key);
162        ed.commit();
163        mChannels.remove(key);
164    }
165
166    public void dump() {
167        Log.d(TAG, "Dumping Names:  ");
168        Log.d(TAG, mNames.toString());
169        Log.d(TAG, "Dumping Channels:  ");
170        Log.d(TAG, mChannels.toString());
171    }
172}
173