/*
 * JBoss, Home of Professional Open Source
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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 javax.enterprise.inject.spi;

/**
 * <p>
 * The container fires an event of this type for each
 * {@linkplain javax.enterprise.event.Observes observer method} 
 * of each enabled bean, before registering the 
 * {@link javax.enterprise.inject.spi.ObserverMethod} object.
 * </p>
 * <p>
 * If any observer method of a {@code ProcessObserverMethod} event throws an
 * exception, the exception is treated as a definition error by the container.
 * </p>
 * 
 * @see ObserverMethod
 * @author Gavin King
 * @author David Allen
 * @param <X> The bean type containing the observer method
 * @param <T> The type of the event being observed
 */
public interface ProcessObserverMethod<T, X>
{
   /**
    * The {@link javax.enterprise.inject.spi.AnnotatedMethod} representing the
    * observer method.
    * 
    * @return the {@link javax.enterprise.inject.spi.AnnotatedMethod}
    *         representing the observer method
    */
   public AnnotatedMethod<X> getAnnotatedMethod();

   /**
    * The {@link javax.enterprise.inject.spi.ObserverMethod} object that will be
    * used by the container to invoke the observer when a matching event is
    * fired.
    * 
    * @return the {@link javax.enterprise.inject.spi.ObserverMethod} object that
    *         will be used by the container to call the observer method
    */
   public ObserverMethod<T> getObserverMethod();

   /**
    * Registers a definition error with the container, causing the container to
    * abort deployment after bean discovery is complete.
    * 
    * @param t A {@link java.lang.Throwable} representing the definition error
    */
   public void addDefinitionError(Throwable t);
}
