| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package android.companion; |
| |
| import static android.text.TextUtils.firstNotEmpty; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.bluetooth.BluetoothDevice; |
| import android.bluetooth.le.ScanFilter; |
| import android.os.ParcelUuid; |
| import android.util.Log; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.regex.Pattern; |
| |
| /** @hide */ |
| public class BluetoothDeviceFilterUtils { |
| private BluetoothDeviceFilterUtils() {} |
| |
| private static final boolean DEBUG = false; |
| private static final String LOG_TAG = "BluetoothDeviceFilterUtil"; |
| |
| @Nullable |
| static String patternToString(@Nullable Pattern p) { |
| return p == null ? null : p.pattern(); |
| } |
| |
| @Nullable |
| static Pattern patternFromString(@Nullable String s) { |
| return s == null ? null : Pattern.compile(s); |
| } |
| |
| static boolean matches(ScanFilter filter, BluetoothDevice device) { |
| return matchesAddress(filter.getDeviceAddress(), device) |
| && matchesServiceUuid(filter.getServiceUuid(), filter.getServiceUuidMask(), device); |
| } |
| |
| static boolean matchesAddress(String deviceAddress, BluetoothDevice device) { |
| final boolean result = deviceAddress == null |
| || (device == null || !deviceAddress.equals(device.getAddress())); |
| if (DEBUG) debugLogMatchResult(result, device, deviceAddress); |
| return result; |
| } |
| |
| static boolean matchesServiceUuids(List<ParcelUuid> serviceUuids, |
| List<ParcelUuid> serviceUuidMasks, BluetoothDevice device) { |
| for (int i = 0; i < serviceUuids.size(); i++) { |
| ParcelUuid uuid = serviceUuids.get(i); |
| ParcelUuid uuidMask = serviceUuidMasks.get(i); |
| if (!matchesServiceUuid(uuid, uuidMask, device)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| static boolean matchesServiceUuid(ParcelUuid serviceUuid, ParcelUuid serviceUuidMask, |
| BluetoothDevice device) { |
| final boolean result = serviceUuid == null || |
| ScanFilter.matchesServiceUuids( |
| serviceUuid, |
| serviceUuidMask, |
| Arrays.asList(device.getUuids())); |
| if (DEBUG) debugLogMatchResult(result, device, serviceUuid); |
| return result; |
| } |
| |
| static boolean matchesName(@Nullable Pattern namePattern, BluetoothDevice device) { |
| boolean result; |
| if (namePattern == null) { |
| result = true; |
| } else if (device == null) { |
| result = false; |
| } else { |
| final String name = device.getName(); |
| result = name != null && namePattern.matcher(name).find(); |
| } |
| if (DEBUG) debugLogMatchResult(result, device, namePattern); |
| return result; |
| } |
| |
| private static void debugLogMatchResult( |
| boolean result, BluetoothDevice device, Object criteria) { |
| Log.i(LOG_TAG, getDeviceDisplayName(device) + (result ? " ~ " : " !~ ") + criteria); |
| } |
| |
| public static String getDeviceDisplayName(@NonNull BluetoothDevice device) { |
| return firstNotEmpty(device.getAliasName(), device.getAddress()); |
| } |
| } |