org.jboss.weld.extensions.bean
Class ImmutablePassivationCapableNarrowingBean<T>

java.lang.Object
  org.jboss.weld.extensions.bean.AbstractImmutableBean<T>
      org.jboss.weld.extensions.bean.ImmutableNarrowingBean<T>
          org.jboss.weld.extensions.bean.ImmutablePassivationCapableNarrowingBean<T>

All Implemented Interfaces:

javax.enterprise.context.spi.Contextual<T>, javax.enterprise.inject.spi.Bean<T>, javax.enterprise.inject.spi.PassivationCapable

public class ImmutablePassivationCapableNarrowingBean<T>
extends ImmutableNarrowingBean<T>
implements javax.enterprise.inject.spi.PassivationCapable

A passivation capable narrowing bean allows you to build a general purpose, passivation capable, bean (likely a producer method), and register it for a narrowed type (or qualifiers). For example, you could create a producer method which uses an a String ID to located an object (the object can have any class):

 @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
 }
 

The delegate bean must return an object which can be cast to the type T, otherwise a ClassCastException will be thrown at runtime when the bean is created.

You can then register a narrowing bean for each type you need:

 event.addBean(new NarrowingBeanBuilder<T>(delegateBean).readFromType(type).create());
 

ImmutablePassivationCapableNarrowingBean will use the annotations on defininingType 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.

The attributes are immutable, and collections are defensively copied on instantiation. It uses the defaults from the specification for properties if not specified.

Author:

Pete Muir

See Also:

NarrowingBeanBuilder, ImmutableNarrowingBean

Constructor Summary

ImmutablePassivationCapableNarrowingBean(javax.enterprise.inject.spi.Bean<Object> delegate, String name, Set<Annotation> qualifiers, Class<? extends Annotation> scope, Set<Class<? extends Annotation>> stereotypes, Set<Type> types, boolean alternative, boolean nullable, String toString, String id)

Method Summary

String

getId()

Methods inherited from class org.jboss.weld.extensions.bean.ImmutableNarrowingBean

create, destroy

Methods inherited from class org.jboss.weld.extensions.bean.AbstractImmutableBean

getBeanClass, getInjectionPoints, getName, getQualifiers, getScope, getStereotypes, getTypes, isAlternative, isNullable, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ImmutablePassivationCapableNarrowingBean

public ImmutablePassivationCapableNarrowingBean(javax.enterprise.inject.spi.Bean<Object> delegate,
                                                String name,
                                                Set<Annotation> qualifiers,
                                                Class<? extends Annotation> scope,
                                                Set<Class<? extends Annotation>> stereotypes,
                                                Set<Type> types,
                                                boolean alternative,
                                                boolean nullable,
                                                String toString,
                                                String id)

Method Detail

getId

public String getId()

Specified by:

getId in interface javax.enterprise.inject.spi.PassivationCapable