Jason Monk | 7ce96b9 | 2015-02-02 11:27:58 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | |
| 17 | package com.android.settingslib.bluetooth; |
| 18 | |
| 19 | import android.bluetooth.BluetoothClass; |
| 20 | import android.bluetooth.BluetoothDevice; |
| 21 | import android.bluetooth.BluetoothUuid; |
| 22 | import android.os.ParcelUuid; |
| 23 | import android.util.Log; |
| 24 | |
| 25 | /** |
| 26 | * BluetoothDeviceFilter contains a static method that returns a |
| 27 | * Filter object that returns whether or not the BluetoothDevice |
| 28 | * passed to it matches the specified filter type constant from |
| 29 | * {@link android.bluetooth.BluetoothDevicePicker}. |
| 30 | */ |
| 31 | public final class BluetoothDeviceFilter { |
| 32 | private static final String TAG = "BluetoothDeviceFilter"; |
| 33 | |
| 34 | /** The filter interface to external classes. */ |
| 35 | public interface Filter { |
| 36 | boolean matches(BluetoothDevice device); |
| 37 | } |
| 38 | |
| 39 | /** All filter singleton (referenced directly). */ |
| 40 | public static final Filter ALL_FILTER = new AllFilter(); |
| 41 | |
| 42 | /** Bonded devices only filter (referenced directly). */ |
| 43 | public static final Filter BONDED_DEVICE_FILTER = new BondedDeviceFilter(); |
| 44 | |
| 45 | /** Unbonded devices only filter (referenced directly). */ |
| 46 | public static final Filter UNBONDED_DEVICE_FILTER = new UnbondedDeviceFilter(); |
| 47 | |
| 48 | /** Table of singleton filter objects. */ |
| 49 | private static final Filter[] FILTERS = { |
| 50 | ALL_FILTER, // FILTER_TYPE_ALL |
| 51 | new AudioFilter(), // FILTER_TYPE_AUDIO |
| 52 | new TransferFilter(), // FILTER_TYPE_TRANSFER |
| 53 | new PanuFilter(), // FILTER_TYPE_PANU |
| 54 | new NapFilter() // FILTER_TYPE_NAP |
| 55 | }; |
| 56 | |
| 57 | /** Private constructor. */ |
| 58 | private BluetoothDeviceFilter() { |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Returns the singleton {@link Filter} object for the specified type, |
| 63 | * or {@link #ALL_FILTER} if the type value is out of range. |
| 64 | * |
| 65 | * @param filterType a constant from BluetoothDevicePicker |
| 66 | * @return a singleton object implementing the {@link Filter} interface. |
| 67 | */ |
| 68 | public static Filter getFilter(int filterType) { |
| 69 | if (filterType >= 0 && filterType < FILTERS.length) { |
| 70 | return FILTERS[filterType]; |
| 71 | } else { |
| 72 | Log.w(TAG, "Invalid filter type " + filterType + " for device picker"); |
| 73 | return ALL_FILTER; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** Filter that matches all devices. */ |
| 78 | private static final class AllFilter implements Filter { |
| 79 | public boolean matches(BluetoothDevice device) { |
| 80 | return true; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /** Filter that matches only bonded devices. */ |
| 85 | private static final class BondedDeviceFilter implements Filter { |
| 86 | public boolean matches(BluetoothDevice device) { |
| 87 | return device.getBondState() == BluetoothDevice.BOND_BONDED; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** Filter that matches only unbonded devices. */ |
| 92 | private static final class UnbondedDeviceFilter implements Filter { |
| 93 | public boolean matches(BluetoothDevice device) { |
| 94 | return device.getBondState() != BluetoothDevice.BOND_BONDED; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | /** Parent class of filters based on UUID and/or Bluetooth class. */ |
| 99 | private abstract static class ClassUuidFilter implements Filter { |
| 100 | abstract boolean matches(ParcelUuid[] uuids, BluetoothClass btClass); |
| 101 | |
| 102 | public boolean matches(BluetoothDevice device) { |
| 103 | return matches(device.getUuids(), device.getBluetoothClass()); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | /** Filter that matches devices that support AUDIO profiles. */ |
| 108 | private static final class AudioFilter extends ClassUuidFilter { |
| 109 | @Override |
| 110 | boolean matches(ParcelUuid[] uuids, BluetoothClass btClass) { |
| 111 | if (uuids != null) { |
| 112 | if (BluetoothUuid.containsAnyUuid(uuids, A2dpProfile.SINK_UUIDS)) { |
| 113 | return true; |
| 114 | } |
| 115 | if (BluetoothUuid.containsAnyUuid(uuids, HeadsetProfile.UUIDS)) { |
| 116 | return true; |
| 117 | } |
| 118 | } else if (btClass != null) { |
| 119 | if (btClass.doesClassMatch(BluetoothClass.PROFILE_A2DP) || |
| 120 | btClass.doesClassMatch(BluetoothClass.PROFILE_HEADSET)) { |
| 121 | return true; |
| 122 | } |
| 123 | } |
| 124 | return false; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** Filter that matches devices that support Object Transfer. */ |
| 129 | private static final class TransferFilter extends ClassUuidFilter { |
| 130 | @Override |
| 131 | boolean matches(ParcelUuid[] uuids, BluetoothClass btClass) { |
| 132 | if (uuids != null) { |
| 133 | if (BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.ObexObjectPush)) { |
| 134 | return true; |
| 135 | } |
| 136 | } |
| 137 | return btClass != null |
| 138 | && btClass.doesClassMatch(BluetoothClass.PROFILE_OPP); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /** Filter that matches devices that support PAN User (PANU) profile. */ |
| 143 | private static final class PanuFilter extends ClassUuidFilter { |
| 144 | @Override |
| 145 | boolean matches(ParcelUuid[] uuids, BluetoothClass btClass) { |
| 146 | if (uuids != null) { |
| 147 | if (BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.PANU)) { |
| 148 | return true; |
| 149 | } |
| 150 | } |
| 151 | return btClass != null |
| 152 | && btClass.doesClassMatch(BluetoothClass.PROFILE_PANU); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /** Filter that matches devices that support NAP profile. */ |
| 157 | private static final class NapFilter extends ClassUuidFilter { |
| 158 | @Override |
| 159 | boolean matches(ParcelUuid[] uuids, BluetoothClass btClass) { |
| 160 | if (uuids != null) { |
| 161 | if (BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.NAP)) { |
| 162 | return true; |
| 163 | } |
| 164 | } |
| 165 | return btClass != null |
| 166 | && btClass.doesClassMatch(BluetoothClass.PROFILE_NAP); |
| 167 | } |
| 168 | } |
| 169 | } |