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 <%= appPackage %>;
  
  
  import android.os.Bundle;
  import android.support.annotation.NonNull;
  import android.support.annotation.Nullable;
  import android.support.v4.app.Fragment;
  
  
  /**
   * Non-UI Fragment used to retain ViewModels.
   */
  public class ViewModelHolder<VM> extends Fragment {
  
      private VM mViewModel;
  
      public ViewModelHolder() { }
  
      public static <M> ViewModelHolder createContainer(@NonNull M viewModel) {
          ViewModelHolder<M> viewModelContainer = new ViewModelHolder<>();
          viewModelContainer.setViewModel(viewModel);
          return viewModelContainer;
      }
  
      @Override
      public void onCreate(@Nullable Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setRetainInstance(true);
      }
  
      @Nullable public VM getViewmodel() {
          return mViewModel;
      }
  
      public void setViewModel(@NonNull VM viewModel) {
          mViewModel = viewModel;
      }
  }
  