| /* |
| * Copyright 2020 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.uwb; |
| |
| import android.annotation.NonNull; |
| import android.os.Binder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| import android.uwb.UwbManager.AdapterStateCallback; |
| import android.uwb.UwbManager.AdapterStateCallback.State; |
| import android.uwb.UwbManager.AdapterStateCallback.StateChangedReason; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * @hide |
| */ |
| public class AdapterStateListener extends IUwbAdapterStateCallbacks.Stub { |
| private static final String TAG = "Uwb.StateListener"; |
| |
| private final IUwbAdapter mAdapter; |
| private boolean mIsRegistered = false; |
| |
| private final Map<AdapterStateCallback, Executor> mCallbackMap = new HashMap<>(); |
| |
| @StateChangedReason |
| private int mAdapterStateChangeReason = AdapterStateCallback.STATE_CHANGED_REASON_ERROR_UNKNOWN; |
| @State |
| private int mAdapterState = AdapterStateCallback.STATE_DISABLED; |
| |
| public AdapterStateListener(@NonNull IUwbAdapter adapter) { |
| mAdapter = adapter; |
| } |
| |
| /** |
| * Register an {@link AdapterStateCallback} with this {@link AdapterStateListener} |
| * |
| * @param executor an {@link Executor} to execute given callback |
| * @param callback user implementation of the {@link AdapterStateCallback} |
| */ |
| public void register(@NonNull Executor executor, @NonNull AdapterStateCallback callback) { |
| synchronized (this) { |
| if (mCallbackMap.containsKey(callback)) { |
| return; |
| } |
| |
| mCallbackMap.put(callback, executor); |
| |
| if (!mIsRegistered) { |
| try { |
| mAdapter.registerAdapterStateCallbacks(this); |
| mIsRegistered = true; |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to register adapter state callback"); |
| throw e.rethrowFromSystemServer(); |
| } |
| } else { |
| sendCurrentState(callback); |
| } |
| } |
| } |
| |
| /** |
| * Unregister the specified {@link AdapterStateCallback} |
| * |
| * @param callback user implementation of the {@link AdapterStateCallback} |
| */ |
| public void unregister(@NonNull AdapterStateCallback callback) { |
| synchronized (this) { |
| if (!mCallbackMap.containsKey(callback)) { |
| return; |
| } |
| |
| mCallbackMap.remove(callback); |
| |
| if (mCallbackMap.isEmpty() && mIsRegistered) { |
| try { |
| mAdapter.unregisterAdapterStateCallbacks(this); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to unregister AdapterStateCallback with service"); |
| throw e.rethrowFromSystemServer(); |
| } |
| mIsRegistered = false; |
| } |
| } |
| } |
| |
| /** |
| * Sets the adapter enabled state |
| * |
| * @param isEnabled value of new adapter state |
| */ |
| public void setEnabled(boolean isEnabled) { |
| synchronized (this) { |
| try { |
| mAdapter.setEnabled(isEnabled); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to set adapter state"); |
| throw e.rethrowFromSystemServer(); |
| } |
| |
| } |
| } |
| |
| /** |
| * Gets the adapter enabled state |
| * |
| * @return integer representing adapter enabled state |
| */ |
| public int getAdapterState() { |
| synchronized (this) { |
| try { |
| return mAdapter.getAdapterState(); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failed to get adapter state"); |
| throw e.rethrowFromSystemServer(); |
| } |
| } |
| } |
| |
| private void sendCurrentState(@NonNull AdapterStateCallback callback) { |
| synchronized (this) { |
| Executor executor = mCallbackMap.get(callback); |
| |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| executor.execute(() -> callback.onStateChanged( |
| mAdapterState, mAdapterStateChangeReason)); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| public void onAdapterStateChanged(int state, int reason) { |
| synchronized (this) { |
| @StateChangedReason int localReason = |
| convertToStateChangedReason(reason); |
| @State int localState = convertToState(state); |
| mAdapterStateChangeReason = localReason; |
| mAdapterState = localState; |
| for (AdapterStateCallback cb : mCallbackMap.keySet()) { |
| sendCurrentState(cb); |
| } |
| } |
| } |
| |
| private static @StateChangedReason int convertToStateChangedReason( |
| @StateChangeReason int reason) { |
| switch (reason) { |
| case StateChangeReason.ALL_SESSIONS_CLOSED: |
| return AdapterStateCallback.STATE_CHANGED_REASON_ALL_SESSIONS_CLOSED; |
| |
| case StateChangeReason.SESSION_STARTED: |
| return AdapterStateCallback.STATE_CHANGED_REASON_SESSION_STARTED; |
| |
| case StateChangeReason.SYSTEM_POLICY: |
| return AdapterStateCallback.STATE_CHANGED_REASON_SYSTEM_POLICY; |
| |
| case StateChangeReason.SYSTEM_BOOT: |
| return AdapterStateCallback.STATE_CHANGED_REASON_SYSTEM_BOOT; |
| |
| case StateChangeReason.UNKNOWN: |
| default: |
| return AdapterStateCallback.STATE_CHANGED_REASON_ERROR_UNKNOWN; |
| } |
| } |
| |
| private static @State int convertToState(@AdapterState int state) { |
| switch (state) { |
| case AdapterState.STATE_ENABLED_INACTIVE: |
| return AdapterStateCallback.STATE_ENABLED_INACTIVE; |
| |
| case AdapterState.STATE_ENABLED_ACTIVE: |
| return AdapterStateCallback.STATE_ENABLED_ACTIVE; |
| |
| case AdapterState.STATE_DISABLED: |
| default: |
| return AdapterStateCallback.STATE_DISABLED; |
| } |
| } |
| } |