content: /*
   * Copyright (C) 2010 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.os;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.SystemApi;
  import android.annotation.TestApi;
  
  /**
   * @hide
   */
  @SystemApi
  @TestApi
  public final class RemoteCallback implements Parcelable {
  
      public interface OnResultListener {
          void onResult(@Nullable Bundle result);
      }
  
      private final OnResultListener mListener;
      private final Handler mHandler;
      private final IRemoteCallback mCallback;
  
      public RemoteCallback(OnResultListener listener) {
          this(listener, null);
      }
  
      public RemoteCallback(@NonNull OnResultListener listener, @Nullable Handler handler) {
          if (listener == null) {
              throw new NullPointerException("listener cannot be null");
          }
          mListener = listener;
          mHandler = handler;
          mCallback = new IRemoteCallback.Stub() {
              @Override
              public void sendResult(Bundle data) {
                  RemoteCallback.this.sendResult(data);
              }
          };
      }
  
      RemoteCallback(Parcel parcel) {
          mListener = null;
          mHandler = null;
          mCallback = IRemoteCallback.Stub.asInterface(
                  parcel.readStrongBinder());
      }
  
      public void sendResult(@Nullable final Bundle result) {
          // Do local dispatch
          if (mListener != null) {
              if (mHandler != null) {
                  mHandler.post(new Runnable() {
                      @Override
                      public void run() {
                          mListener.onResult(result);
                      }
                  });
              } else {
                  mListener.onResult(result);
              }
          // Do remote dispatch
          } else {
              try {
                  mCallback.sendResult(result);
              } catch (RemoteException e) {
                  /* ignore */
              }
          }
      }
  
      @Override
      public int describeContents() {
          return 0;
      }
  
      @Override
      public void writeToParcel(Parcel parcel, int flags) {
          parcel.writeStrongBinder(mCallback.asBinder());
      }
  
      public static final @android.annotation.NonNull Parcelable.Creator<RemoteCallback> CREATOR
              = new Parcelable.Creator<RemoteCallback>() {
          public RemoteCallback createFromParcel(Parcel parcel) {
              return new RemoteCallback(parcel);
          }
  
          public RemoteCallback[] newArray(int size) {
              return new RemoteCallback[size];
          }
      };
  }
  