javax.enterprise.inject.spi.ProcessProducer Maven / Gradle / Ivy
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* Copyright 2010, 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 javax.enterprise.inject.spi;
import javax.enterprise.inject.spi.configurator.ProducerConfigurator;
/**
*
* The container fires an event of this type for each {@linkplain javax.enterprise.inject.Produces producer method or field} of
* each enabled bean, including resources.
*
*
* Any observer of this event is permitted to wrap and/or replace the {@code Producer} by calling either
* {@link #setProducer(Producer)} or {@link #configureProducer()}. If both methods are called within an observer notification an
* {@link IllegalStateException} is thrown. The container must use the final value of this property, after all observers have
* been called, whenever it calls the producer or disposer.
*
*
* For example, this observer decorates the {@code Producer} for the all producer methods and field of type
* {@code EntityManager}.
*
*
*
* void decorateEntityManager(@Observes ProcessProducer<?, EntityManager> pp) {
* pit.setProducer(decorate(pp.getProducer()));
* }
*
*
* If any observer method of a {@code ProcessProducer} event throws an exception, the exception is treated as a definition error
* by the container.
*
*
* @see Producer
* @author David Allen
* @param The bean class of the bean that declares the producer method or field
* @param The return type of the producer method or the type of the producer field
*/
public interface ProcessProducer {
/**
* Returns the {@link javax.enterprise.inject.spi.AnnotatedField} representing the producer field or the
* {@link javax.enterprise.inject.spi.AnnotatedMethod} representing the producer method.
*
* @return the {@link javax.enterprise.inject.spi.AnnotatedMember} representing the producer
* @throws IllegalStateException if called outside of the observer method invocation
*/
public AnnotatedMember getAnnotatedMember();
/**
* Returns the {@link javax.enterprise.inject.spi.Producer} object that will be used by the container to call the producer
* method or read the producer field.
*
* @return the {@link javax.enterprise.inject.spi.Producer} invoker object used by the container
* @throws IllegalStateException if called outside of the observer method invocation
*/
public Producer getProducer();
/**
* Replaces the {@link javax.enterprise.inject.spi.Producer} object that will be used by the container to call the producer
* method or read the producer field.
*
* @param producer the new {@link javax.enterprise.inject.spi.Producer} object to use
* @throws IllegalStateException if called outside of the observer method invocation
*/
public void setProducer(Producer producer);
/**
* Returns a {@link ProducerConfigurator} initialized with the {@link Producer} processed by this event, to configure a new
* {@link Producer} that will replace the original one at the end of the observer invocation.
*
*
* Each call returns the same configurator instance within an observer notification.
*
*
* @return a non reusable {@link ProducerConfigurator} to configure the original
* {@link javax.enterprise.inject.spi.Producer}.
* @throws IllegalStateException if called outside of the observer method invocation
* @since 2.0
*/
public ProducerConfigurator configureProducer();
/**
* Registers a definition error with the container, causing the container to abort deployment after bean discovery is
* complete.
*
* @param t The definition error to register as a {@link java.lang.Throwable}
* @throws IllegalStateException if called outside of the observer method invocation
*/
public void addDefinitionError(Throwable t);
}