/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.forge.furnace.container.cdi.util;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Set;
/**
* <p>
* This bean-wrapper allows you to build a general purpose bean (likely a producer method), and register it for a
* narrowed type (or qualifiers). You can easily create instances of this class with the {@link WrappingBeanBuilder}.
* </p>
* <p/>
* <p>
* For example, you could create a producer method which uses an a String ID tolocated an object (the object can have
* any class):
* </p>
*
* <pre>
* @Produces
* // Use some synthetic scope to prevent this from interfering with other
* // resolutions
* @MyProducer
* Object produce(InjectionPoint ip)
* {
* String id = ip.getAnnotated().getAnnotation(Id.class).value();
* // Lookup and return the object for the id
* }
* </pre>
* <p>
* The wrapped bean <em>must</em> return an object which can be cast to the type <code>T</code>, otherwise a
* {@link ClassCastException} will be thrown at runtime when the bean is created.
* </p>
* <p>
* You can then register a narrowing bean for each type you need:
* </p>
*
* <pre>
* event.addBean(new NarrowingBeanBuilder<T>(delegateBean).readFromType(type)
* .create());
* </pre>
* <p>
* {@link ImmutableBeanWrapper} will use the annotations on <code>definingType</code> to discover the qualifiers, types,
* scope, stereotypes of the bean, as well as determine it's name (if any) and whether it is an alternative.
* </p>
* <p>
* The attributes are immutable, and collections are defensively copied on instantiation. It uses the defaults from the
* specification for properties if not specified.
* </p>
*
* @see org.apache.deltaspike.core.util.bean.WrappingBeanBuilder
*/
class ImmutableBeanWrapper<T> extends AbstractImmutableBean<T>
{
private final Bean<T> wrapped;
/**
* Instantiate a new {@link ImmutableBeanWrapper}.
*
* @param bean the bean to wrapped the lifecycle to
* @param name the name of the bean
* @param qualifiers the qualifiers of the bean
* @param scope the scope of the bean
* @param stereotypes the bean's stereotypes
* @param types the types of the bean
* @param alternative whether the bean is an alternative
* @param nullable true if the bean is nullable
* @param toString the string which should be returned by #{@link #toString()}
*/
public ImmutableBeanWrapper(Bean<T> bean,
String name,
Set<Annotation> qualifiers,
Class<? extends Annotation> scope,
Set<Class<? extends Annotation>> stereotypes,
Set<Type> types,
boolean alternative,
boolean nullable,
String toString)
{
super(bean.getBeanClass(), name, qualifiers, scope, stereotypes,
types, alternative, nullable, bean.getInjectionPoints(), toString);
wrapped = bean;
}
@Override
public T create(CreationalContext<T> creationalContext)
{
return wrapped.create(creationalContext);
}
@Override
public void destroy(T instance, CreationalContext<T> creationalContext)
{
wrapped.destroy(instance, creationalContext);
}
}