content: package act.inject;
  
  /*-
   * #%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 org.osgl.inject.BeanSpec;
  
  import java.lang.reflect.Field;
  
  /**
   * Listens for injections into instances of type {@link #listenTo()}. Useful for performing further
   * injections, post-injection initialization, and more.
   */
  public interface DependencyInjectionListener {
  
      /**
       * Returns the classes this listener is interested in
       *
       * @return A list of classes
       */
      Class[] listenTo();
  
      /**
       * Invoked once an instance has been created.
       * <p>
       * If {@link DependencyInjector} inject a field and the {@link Field#getGenericType() generic type} of
       * the field is kind of {@link java.lang.reflect.ParameterizedType}, then the type parameters of that
       * generic type will be passed to the listener
       * </p>
       *
       * @param bean     instance to be returned by {@link DependencyInjector}
       * @param beanSpec the spec about the bean instance
       */
      void onInjection(Object bean, BeanSpec beanSpec);
  }
  