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* Copyright 2014, 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.weld.tests.experimental.processObserverMethod;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.HashSet;
import java.util.Set;
import javax.enterprise.event.Observes;
import javax.enterprise.event.Reception;
import javax.enterprise.event.TransactionPhase;
import javax.enterprise.inject.spi.DefinitionException;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ObserverMethod;
import org.jboss.weld.experimental.ExperimentalProcessObserverMethod;
import org.jboss.weld.literal.NamedLiteral;
public class DummyExtension implements Extension {
void vetoObserverMethod(@Observes ExperimentalProcessObserverMethod<String, ?> event) {
if (checkExperimentalObserver(event.getObserverMethod().getObservedQualifiers())) {
event.veto();
}
}
void replaceObserverMethod(@Observes ExperimentalProcessObserverMethod<Number, ?> event) {
if (!checkExperimentalObserver(event.getObserverMethod().getObservedQualifiers())) {
return;
}
// first, verify getBeanClass() check
ObserverMethod<Number> wrongObserver = new ForwardingObserverMethod<Number>(event.getObserverMethod()) {
@Override
public Class<?> getBeanClass() {
return Number.class;
}
};
try {
event.setObserverMethod(wrongObserver);
throw new RuntimeException("Expected exception not thrown");
} catch (DefinitionException expected) {
}
ObserverMethod<Number> replacement = new ForwardingObserverMethod<Number>(event.getObserverMethod()) {
@Override
public Type getObservedType() {
return Integer.class;
}
@Override
public Set<Annotation> getObservedQualifiers() {
Set<Annotation> qualifiers = new HashSet<>(delegate().getObservedQualifiers());
qualifiers.add(new NamedLiteral("experimental"));
return qualifiers;
}
};
event.setObserverMethod(replacement);
}
private boolean checkExperimentalObserver(Set<Annotation> qualifiers) {
return qualifiers.stream().filter((a) -> a.annotationType().equals(Experimental.class)).findFirst().isPresent();
}
private static class ForwardingObserverMethod<T> implements ObserverMethod<T> {
private final ObserverMethod<T> delegate;
public ForwardingObserverMethod(ObserverMethod<T> delegate) {
this.delegate = delegate;
}
protected ObserverMethod<T> delegate() {
return delegate;
}
@Override
public Class<?> getBeanClass() {
return delegate().getBeanClass();
}
@Override
public Type getObservedType() {
return delegate().getObservedType();
}
@Override
public Set<Annotation> getObservedQualifiers() {
return delegate().getObservedQualifiers();
}
@Override
public Reception getReception() {
return delegate().getReception();
}
@Override
public TransactionPhase getTransactionPhase() {
return delegate().getTransactionPhase();
}
@Override
public void notify(T event) {
delegate().notify(event);
}
}
}