content: package act.util;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import act.app.App;
  import act.app.event.SysEventId;
  
  /**
   * An `AppSubTypeFinder` extends {@link SubTypeFinder} with an method to
   * apply the finder when application started.
   */
  @SuppressWarnings("unused")
  public abstract class AppSubTypeFinder<T> extends SubTypeFinder<T> {
  
      public AppSubTypeFinder(Class<T> target) {
          super(target);
          registerSingleton();
      }
  
      public AppSubTypeFinder(Class<T> target, SysEventId bindingEvent) {
          super(target, bindingEvent);
          registerSingleton();
      }
  
      private void registerSingleton() {
          App.instance().registerSingleton(getClass(), this);
      }
  
      @SuppressWarnings("unused")
      public static class _AppSubTypeFinderFinder extends SubTypeFinder<AppSubTypeFinder> {
  
          public _AppSubTypeFinderFinder() {
              super(AppSubTypeFinder.class, SysEventId.SINGLETON_PROVISIONED);
          }
  
          @Override
          protected void found(final Class<? extends AppSubTypeFinder> target, App app) {
              AppSubTypeFinder finder = app.getInstance(target);
              finder.applyTo(app);
          }
      }
  }
  