content: /*
   * Copyright (C) 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 com.android.internal.telephony.uicc.euicc.async;
  
  import android.annotation.Nullable;
  import android.os.Handler;
  
  /**
   * Helper on {@link AsyncResultCallback}.
   *
   * @hide
   */
  public final class AsyncResultHelper {
      /**
       * Calls the {@code callback} to return the {@code result} object. The {@code callback} will be
       * run in the {@code handler}. If the {@code handler} is null, the callback will be called
       * immediately.
       *
       * @param <T> Result type.
       */
      public static <T> void returnResult(
              final T result, final AsyncResultCallback<T> callback, @Nullable Handler handler) {
          if (handler == null) {
              callback.onResult(result);
          } else {
              handler.post(
                      new Runnable() {
                          @Override
                          public void run() {
                              callback.onResult(result);
                          }
                      });
          }
      }
  
      /**
       * Calls the {@code callback} to return the thrown {@code e} exception. The {@code callback}
       * will be run in the {@code handler}. If the {@code handler} is null, the callback will be
       * called immediately.
       */
      public static void throwException(
              final Throwable e, final AsyncResultCallback<?> callback, @Nullable Handler handler) {
          if (handler == null) {
              callback.onException(e);
          } else {
              handler.post(
                      new Runnable() {
                          @Override
                          public void run() {
                              callback.onException(e);
                          }
                      });
          }
      }
  
      private AsyncResultHelper() {}
  }
  