content: /*
   * Copyright 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.telephony;
  
  import android.annotation.IntDef;
  import android.annotation.Nullable;
  import android.annotation.SystemApi;
  import android.os.RemoteException;
  import android.telephony.NetworkService.NetworkServiceProvider;
  
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  
  /**
   * Network service callback. Object of this class is passed to NetworkServiceProvider upon
   * calling requestNetworkRegistrationInfo, to receive asynchronous feedback from
   * NetworkServiceProvider upon onRequestNetworkRegistrationInfoComplete. It's like a wrapper of
   * INetworkServiceCallback because INetworkServiceCallback can't be a parameter type in public APIs.
   *
   * @hide
   */
  @SystemApi
  public class NetworkServiceCallback {
  
      private static final String mTag = NetworkServiceCallback.class.getSimpleName();
  
      /**
       * Result of network requests
       * @hide
       */
      @Retention(RetentionPolicy.SOURCE)
      @IntDef({RESULT_SUCCESS, RESULT_ERROR_UNSUPPORTED, RESULT_ERROR_INVALID_ARG, RESULT_ERROR_BUSY,
              RESULT_ERROR_ILLEGAL_STATE, RESULT_ERROR_FAILED})
      public @interface Result {}
  
      /** Request is completed successfully */
      public static final int RESULT_SUCCESS              = 0;
      /** Request is not support */
      public static final int RESULT_ERROR_UNSUPPORTED    = 1;
      /** Request contains invalid arguments */
      public static final int RESULT_ERROR_INVALID_ARG    = 2;
      /** Service is busy */
      public static final int RESULT_ERROR_BUSY           = 3;
      /** Request sent in illegal state */
      public static final int RESULT_ERROR_ILLEGAL_STATE  = 4;
      /** Request failed */
      public static final int RESULT_ERROR_FAILED         = 5;
  
      private final INetworkServiceCallback mCallback;
  
      /** @hide */
      public NetworkServiceCallback(INetworkServiceCallback callback) {
          mCallback = callback;
      }
  
      /**
       * Called to indicate result of
       * {@link NetworkServiceProvider#requestNetworkRegistrationInfo(int, NetworkServiceCallback)}
       *
       * @param result Result status like {@link NetworkServiceCallback#RESULT_SUCCESS} or
       * {@link NetworkServiceCallback#RESULT_ERROR_UNSUPPORTED}
       * @param state The state information to be returned to callback.
       */
      public void onRequestNetworkRegistrationInfoComplete(int result,
                                                           @Nullable NetworkRegistrationInfo state) {
          if (mCallback != null) {
              try {
                  mCallback.onRequestNetworkRegistrationInfoComplete(result, state);
              } catch (RemoteException e) {
                  Rlog.e(mTag, "Failed to onRequestNetworkRegistrationInfoComplete on the remote");
              }
          } else {
              Rlog.e(mTag, "onRequestNetworkRegistrationInfoComplete callback is null.");
          }
      }
  }