BluetoothOppPreference.java revision a930b6831d0c70b6c5d34e548e6b1dceaa6529a0 
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 V = Constants.VERBOSE;
50
51    private static BluetoothOppPreference INSTANCE;
52
53    /* Used when obtaining a reference to the singleton instance. */
54    private static Object INSTANCE_LOCK = new Object();
55
56    private boolean mInitialized;
57
58    private Context mContext;
59
60    private SharedPreferences mNamePreference;
61
62    private SharedPreferences mChannelPreference;
63
64    private HashMap<String, Integer> mChannels = new HashMap<String, Integer>();
65
66    private HashMap<String, String> mNames = new HashMap<String, String>();
67
68    public static BluetoothOppPreference getInstance(Context context) {
69        synchronized (INSTANCE_LOCK) {
70            if (INSTANCE == null) {
71                INSTANCE = new BluetoothOppPreference();
72            }
73            if (!INSTANCE.init(context)) {
74                return null;
75            }
76            return INSTANCE;
77        }
78    }
79
80    private boolean init(Context context) {
81        if (mInitialized)
82            return true;
83        mInitialized = true;
84
85        mContext = context;
86
87        mNamePreference = mContext.getSharedPreferences(Constants.BLUETOOTHOPP_NAME_PREFERENCE,
88                Context.MODE_PRIVATE);
89        mChannelPreference = mContext.getSharedPreferences(
90                Constants.BLUETOOTHOPP_CHANNEL_PREFERENCE, Context.MODE_PRIVATE);
91
92        mNames = (HashMap<String, String>) mNamePreference.getAll();
93        mChannels = (HashMap<String, Integer>) mChannelPreference.getAll();
94
95        return true;
96    }
97
98    private String getChannelKey(BluetoothDevice remoteDevice, int uuid) {
99        return remoteDevice.getAddress() + "_" + Integer.toHexString(uuid);
100    }
101
102    public String getName(BluetoothDevice remoteDevice) {
103        if (remoteDevice.getAddress().equals("FF:FF:FF:00:00:00")) {
104            return "localhost";
105        }
106        if (!mNames.isEmpty()) {
107            String name = mNames.get(remoteDevice.getAddress());
108            if (name != null) {
109                return name;
110            }
111        }
112        return null;
113    }
114
115    public int getChannel(BluetoothDevice remoteDevice, int uuid) {
116        String key = getChannelKey(remoteDevice, uuid);
117        if (V) Log.v(TAG, "getChannel " + key);
118        Integer channel = null;
119        if (mChannels != null) {
120            channel = mChannels.get(key);
121            if (V) Log.v(TAG, "getChannel for " + remoteDevice + "_" + Integer.toHexString(uuid) +
122                        " as " + channel);
123        }
124        return (channel != null) ? channel : -1;
125    }
126
127    public void setName(BluetoothDevice remoteDevice, String name) {
128        if (V) Log.v(TAG, "Setname for " + remoteDevice + " to " + name);
129        if (!name.equals(getName(remoteDevice))) {
130            Editor ed = mNamePreference.edit();
131            ed.putString(remoteDevice.getAddress(), name);
132            ed.commit();
133            mNames.put(remoteDevice.getAddress(), name);
134        }
135    }
136
137    public void setChannel(BluetoothDevice remoteDevice, int uuid, int channel) {
138        if (V) Log.v(TAG, "Setchannel for " + remoteDevice + "_" + Integer.toHexString(uuid) + " to "
139                    + channel);
140        if (channel != getChannel(remoteDevice, uuid)) {
141            String key = getChannelKey(remoteDevice, uuid);
142            Editor ed = mChannelPreference.edit();
143            ed.putInt(key, channel);
144            ed.commit();
145            mChannels.put(key, channel);
146        }
147    }
148
149    public void removeChannel(BluetoothDevice remoteDevice, int uuid) {
150        String key = getChannelKey(remoteDevice, uuid);
151        Editor ed = mChannelPreference.edit();
152        ed.remove(key);
153        ed.commit();
154        mChannels.remove(key);
155    }
156
157    public void dump() {
158        Log.d(TAG, "Dumping Names:  ");
159        Log.d(TAG, mNames.toString());
160        Log.d(TAG, "Dumping Channels:  ");
161        Log.d(TAG, mChannels.toString());
162    }
163}
164