/*
* Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.event;
import java.lang.annotation.Annotation;
public interface Event<T> {
/**
* <p>Fires an event with the specified qualifiers and notifies
* observers.</p>
*
* @param event the event object
* @throws IllegalArgumentException if the runtime type of the event object contains a type variable
*/
public void fire(T event);
/**
* <p>Obtains a child <tt>Event</tt> for the given additional
* required qualifiers.</p>
*
* @param qualifiers the additional specified qualifiers
* @return the child <tt>Event</tt>
* @throws IllegalArgumentException if passed two instances of the
* same qualifier type, or an instance of an annotation that is not
* a qualifier type
*/
public Event<T> select(Annotation... qualifiers);
/**
* <p>Obtains a child <tt>Event</tt> for the given required type and
* additional required qualifiers.</p>
*
* @param <U> the specified type
* @param subtype a {@link java.lang.Class} representing the specified type
* @param qualifiers the additional specified qualifiers
* @return the child <tt>Event</tt>
* @throws IllegalArgumentException if passed two instances of the
* same qualifier type, or an instance of an annotation that is not
* a qualifier type
*/
public <U extends T> Event<U> select(Class<U> subtype, Annotation... qualifiers);
}