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      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 
     33 package com.android.bluetooth.opp;
     34 
     35 import java.util.HashMap;
     36 
     37 import android.bluetooth.BluetoothDevice;
     38 import android.content.Context;
     39 import android.content.SharedPreferences;
     40 import android.content.SharedPreferences.Editor;
     41 import 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  */
     47 public 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 != null && !name.equals(getName(remoteDevice))) {
    130             Editor ed = mNamePreference.edit();
    131             ed.putString(remoteDevice.getAddress(), name);
    132             ed.apply();
    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.apply();
    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.apply();
    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