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* Copyright 2012, Red Hat, Inc., 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 org.jboss.cdi.tck.tests.decorators.builtin.event.complex;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CompletionStage;
import javax.decorator.Decorator;
import javax.decorator.Delegate;
import javax.enterprise.event.Event;
import javax.enterprise.event.NotificationOptions;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.ObserverMethod;
import javax.enterprise.util.TypeLiteral;
import javax.inject.Inject;
@Decorator
@SuppressWarnings("serial")
public class OrderedEventDeliveryDecorator<T> implements Event<T>, Serializable {
private final Set<Annotation> qualifiers;
private final BeanManager manager;
private final ObserverMethodComparator comparator;
public OrderedEventDeliveryDecorator(Set<Annotation> qualifiers, BeanManager manager, ObserverMethodComparator comparator) {
this.qualifiers = qualifiers;
this.manager = manager;
this.comparator = comparator;
}
@Inject
public OrderedEventDeliveryDecorator(@Delegate Event<T> delegate, InjectionPoint ip, BeanManager manager,
OrderedEventDeliveryExtension extension) {
this.qualifiers = new HashSet<Annotation>(ip.getQualifiers());
this.manager = manager;
this.comparator = new ObserverMethodComparator(extension);
}
@Override
public void fire(T event) {
Set<ObserverMethod<? super T>> observers = manager.resolveObserverMethods(event,
this.qualifiers.toArray(new Annotation[qualifiers.size()]));
List<ObserverMethod<? super T>> sortedObservers = new ArrayList<ObserverMethod<? super T>>(observers);
Collections.sort(sortedObservers, comparator);
for (ObserverMethod<? super T> observer : sortedObservers) {
observer.notify(event);
}
}
@Override
public <U extends T> CompletionStage<U> fireAsync(U event) {
return null;
}
@Override
public <U extends T> CompletionStage<U> fireAsync(U event, NotificationOptions options) {
return null;
}
@Override
public Event<T> select(Annotation... qualifiers) {
return new OrderedEventDeliveryDecorator<T>(mergeAnnotations(this.qualifiers, qualifiers), manager, comparator);
}
@Override
public <U extends T> Event<U> select(Class<U> subtype, Annotation... qualifiers) {
return new OrderedEventDeliveryDecorator<U>(mergeAnnotations(this.qualifiers, qualifiers), manager, comparator);
}
@Override
public <U extends T> Event<U> select(TypeLiteral<U> subtype, Annotation... qualifiers) {
return new OrderedEventDeliveryDecorator<U>(mergeAnnotations(this.qualifiers, qualifiers), manager, comparator);
}
private Set<Annotation> mergeAnnotations(Set<Annotation> annotations, Annotation... additionalAnnotations) {
Set<Annotation> result = new HashSet<Annotation>(annotations);
for (Annotation annotation : additionalAnnotations) {
result.add(annotation);
}
return result;
}
}