content: /*
   * Copyright (C) 2014 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 com.android.location.provider;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.hardware.location.IActivityRecognitionHardware;
  import android.hardware.location.IActivityRecognitionHardwareWatcher;
  import android.os.Binder;
  import android.os.IBinder;
  import android.os.Process;
  import android.os.RemoteException;
  import android.util.Log;
  
  /**
   * A watcher class for Activity-Recognition instances.
   *
   * @deprecated use {@link ActivityRecognitionProviderClient} instead.
   * @hide
   */
  @Deprecated
  public class ActivityRecognitionProviderWatcher {
      private static final String TAG = "ActivityRecognitionProviderWatcher";
  
      private static ActivityRecognitionProviderWatcher sWatcher;
      private static final Object sWatcherLock = new Object();
  
      private ActivityRecognitionProvider mActivityRecognitionProvider;
  
      private ActivityRecognitionProviderWatcher() {}
  
      public static ActivityRecognitionProviderWatcher getInstance() {
          synchronized (sWatcherLock) {
              if (sWatcher == null) {
                  sWatcher = new ActivityRecognitionProviderWatcher();
              }
              return sWatcher;
          }
      }
  
      private IActivityRecognitionHardwareWatcher.Stub mWatcherStub =
              new IActivityRecognitionHardwareWatcher.Stub() {
          @Override
          public void onInstanceChanged(IActivityRecognitionHardware instance) {
              int callingUid = Binder.getCallingUid();
              if (callingUid != Process.SYSTEM_UID) {
                  Log.d(TAG, "Ignoring calls from non-system server. Uid: " + callingUid);
                  return;
              }
  
              try {
                  mActivityRecognitionProvider = new ActivityRecognitionProvider(instance);
              } catch (RemoteException e) {
                  Log.e(TAG, "Error creating Hardware Activity-Recognition", e);
              }
          }
      };
  
      /**
       * Gets the binder needed to interact with proxy provider in the platform.
       */
      @NonNull
      public IBinder getBinder() {
          return mWatcherStub;
      }
  
      /**
       * Gets an object that supports the functionality of {@link ActivityRecognitionProvider}.
       *
       * @return Non-null value if the functionality is supported by the platform, false otherwise.
       */
      @Nullable
      public ActivityRecognitionProvider getActivityRecognitionProvider() {
          return mActivityRecognitionProvider;
      }
  }
  