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/*
* 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.net.wifi.ScanResult;
import android.os.ParcelUuid;
import android.os.Parcelable;
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 = "BluetoothDeviceFilterUtils";
@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) {
boolean result = matchesAddress(filter.getDeviceAddress(), device)
&& matchesServiceUuid(filter.getServiceUuid(), filter.getServiceUuidMask(), device);
if (DEBUG) debugLogMatchResult(result, device, filter);
return result;
}
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;
}
static boolean matchesName(@Nullable Pattern namePattern, ScanResult device) {
boolean result;
if (namePattern == null) {
result = true;
} else if (device == null) {
result = false;
} else {
final String name = device.SSID;
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, getDeviceDisplayNameInternal(device) + (result ? " ~ " : " !~ ") + criteria);
}
private static void debugLogMatchResult(
boolean result, ScanResult device, Object criteria) {
Log.i(LOG_TAG, getDeviceDisplayNameInternal(device) + (result ? " ~ " : " !~ ") + criteria);
}
public static String getDeviceDisplayNameInternal(@NonNull BluetoothDevice device) {
return firstNotEmpty(device.getAliasName(), device.getAddress());
}
public static String getDeviceDisplayNameInternal(@NonNull ScanResult device) {
return firstNotEmpty(device.SSID, device.BSSID);
}
public static String getDeviceMacAddress(@NonNull Parcelable device) {
if (device instanceof BluetoothDevice) {
return ((BluetoothDevice) device).getAddress();
} else if (device instanceof ScanResult) {
return ((ScanResult) device).BSSID;
} else if (device instanceof android.bluetooth.le.ScanResult) {
return getDeviceMacAddress(((android.bluetooth.le.ScanResult) device).getDevice());
} else {
throw new IllegalArgumentException("Unknown device type: " + device);
}
}
}
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