BluetoothOppPreference.java revision 0bd5f7b5c36a60687ffe895368fd8df6df38acab 
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        mContext = context;
87
88        mNamePreference = mContext.getSharedPreferences(Constants.BLUETOOTHOPP_NAME_PREFERENCE,
89                Context.MODE_PRIVATE);
90        mChannelPreference = mContext.getSharedPreferences(
91                Constants.BLUETOOTHOPP_CHANNEL_PREFERENCE, Context.MODE_PRIVATE);
92
93        mNames = (HashMap<String, String>) mNamePreference.getAll();
94        mChannels = (HashMap<String, Integer>) mChannelPreference.getAll();
95
96        return true;
97    }
98
99    private String getChannelKey(BluetoothDevice remoteDevice, int uuid) {
100        return remoteDevice.getAddress() + "_" + Integer.toHexString(uuid);
101    }
102
103    public String getName(BluetoothDevice remoteDevice) {
104        if (remoteDevice.getAddress().equals("FF:FF:FF:00:00:00")) {
105            return "localhost";
106        }
107        if (!mNames.isEmpty()) {
108            String name = mNames.get(remoteDevice.getAddress());
109            if (name != null) {
110                return name;
111            }
112        }
113        return null;
114    }
115
116    public int getChannel(BluetoothDevice remoteDevice, int uuid) {
117        String key = getChannelKey(remoteDevice, uuid);
118        if (V) Log.v(TAG, "getChannel " + key);
119        Integer channel = null;
120        if (mChannels != null) {
121            channel = mChannels.get(key);
122            if (V) Log.v(TAG, "getChannel for " + remoteDevice + "_" + Integer.toHexString(uuid) +
123                        " as " + channel);
124        }
125        return (channel != null) ? channel : -1;
126    }
127
128    public void setName(BluetoothDevice remoteDevice, String name) {
129        if (V) Log.v(TAG, "Setname for " + remoteDevice + " to " + name);
130        if (!name.equals(getName(remoteDevice))) {
131            Editor ed = mNamePreference.edit();
132            ed.putString(remoteDevice.getAddress(), name);
133            ed.commit();
134            mNames.put(remoteDevice.getAddress(), name);
135        }
136    }
137
138    public void setChannel(BluetoothDevice remoteDevice, int uuid, int channel) {
139        if (V) Log.v(TAG, "Setchannel for " + remoteDevice + "_" + Integer.toHexString(uuid) + " to "
140                    + channel);
141        if (channel != getChannel(remoteDevice, uuid)) {
142            String key = getChannelKey(remoteDevice, uuid);
143            Editor ed = mChannelPreference.edit();
144            ed.putInt(key, channel);
145            ed.commit();
146            mChannels.put(key, channel);
147        }
148    }
149
150    public void removeChannel(BluetoothDevice remoteDevice, int uuid) {
151        String key = getChannelKey(remoteDevice, uuid);
152        Editor ed = mChannelPreference.edit();
153        ed.remove(key);
154        ed.commit();
155        mChannels.remove(key);
156    }
157
158    public void dump() {
159        Log.d(TAG, "Dumping Names:  ");
160        Log.d(TAG, mNames.toString());
161        Log.d(TAG, "Dumping Channels:  ");
162        Log.d(TAG, mChannels.toString());
163    }
164}
165