| /* |
| * Copyright (C) 2022 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.nearby; |
| |
| import android.annotation.IntRange; |
| import android.annotation.NonNull; |
| import android.annotation.SystemApi; |
| import android.os.Parcel; |
| |
| /** |
| * Filter for scanning a nearby device. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public abstract class ScanFilter { |
| /** |
| * Creates a {@link ScanFilter} from the parcel. |
| * |
| * @hide |
| */ |
| public static ScanFilter createFromParcel(Parcel in) { |
| int type = in.readInt(); |
| switch (type) { |
| // Currently, only Nearby Presence filtering is supported, in the future |
| // filtering other nearby specifications will be added. |
| case ScanRequest.SCAN_TYPE_NEARBY_PRESENCE: |
| return PresenceScanFilter.createFromParcelBody(in); |
| default: |
| throw new IllegalStateException( |
| "Unexpected scan type (value " + type + ") in parcel."); |
| } |
| } |
| |
| private final @ScanRequest.ScanType int mType; |
| private final int mMaxPathLoss; |
| |
| /** |
| * Constructs a Scan Filter. |
| * |
| * @hide |
| */ |
| ScanFilter(@ScanRequest.ScanType int type, @IntRange(from = 0, to = 127) int maxPathLoss) { |
| mType = type; |
| mMaxPathLoss = maxPathLoss; |
| } |
| |
| /** |
| * Constructs a Scan Filter. |
| * |
| * @hide |
| */ |
| ScanFilter(@ScanRequest.ScanType int type, Parcel in) { |
| mType = type; |
| mMaxPathLoss = in.readInt(); |
| } |
| |
| /** |
| * Returns the type of this scan filter. |
| */ |
| public @ScanRequest.ScanType int getType() { |
| return mType; |
| } |
| |
| /** |
| * Returns the maximum path loss (in dBm) of the received scan result. The path loss is the |
| * attenuation of radio energy between sender and receiver. Path loss here is defined as |
| * (TxPower - Rssi). |
| */ |
| @IntRange(from = 0, to = 127) |
| public int getMaxPathLoss() { |
| return mMaxPathLoss; |
| } |
| |
| /** |
| * |
| * Writes the scan filter to the parcel. |
| * |
| * @hide |
| */ |
| public void writeToParcel(@NonNull Parcel dest, int flags) { |
| dest.writeInt(mType); |
| dest.writeInt(mMaxPathLoss); |
| } |
| } |