Java 类javax.enterprise.inject.spi.Decorator 实例源码

/**
 * Listener to ProcessBean event to locate handlers.
 *
 * @param processBean current {@link AnnotatedType}
 * @param beanManager  Activated Bean Manager
 * @throws TypeNotPresentException if any of the actual type arguments refers to a non-existent type declaration
 *                                 when trying to obtain the actual type arguments from a
 *                                 {@link java.lang.reflect.ParameterizedType}
 * @throws java.lang.reflect.MalformedParameterizedTypeException
 *                                 if any of the actual type parameters refer to a parameterized type that cannot
 *                                 be instantiated for any reason when trying to obtain the actual type arguments
 *                                 from a {@link java.lang.reflect.ParameterizedType}
 */
@SuppressWarnings("UnusedDeclaration")
public <T> void findHandlers(@Observes final ProcessBean<?> processBean, final BeanManager beanManager)
{
    if (!isActivated)
    {
        return;
    }

    if (processBean.getBean() instanceof Interceptor || processBean.getBean() instanceof Decorator ||
            !(processBean.getAnnotated() instanceof AnnotatedType))
    {
        return;
    }

    AnnotatedType annotatedType = (AnnotatedType)processBean.getAnnotated();

    if (annotatedType.getJavaClass().isAnnotationPresent(ExceptionHandler.class))
    {
        final Set<AnnotatedMethod<? super T>> methods = annotatedType.getMethods();

        for (AnnotatedMethod<? super T> method : methods)
        {
            if (HandlerMethodImpl.isHandler(method))
            {
                if (method.getJavaMember().getExceptionTypes().length != 0)
                {
                    processBean.addDefinitionError(new IllegalArgumentException(
                        String.format("Handler method %s must not throw exceptions", method.getJavaMember())));
                }

                //beanManager won't be stored in the instance -> no issue with wls12c
                registerHandlerMethod(new HandlerMethodImpl(processBean.getBean(), method, beanManager));
            }
        }
    }
}

@Override
public List<Decorator<?>> resolveDecorators(Set<Type> types, Annotation... qualifiers)
{
    // TODO Auto-generated method stub
    return null;
}

@Override
public List<Decorator<?>> resolveDecorators(final Set<Type> arg0,
        final Annotation... arg1) {
    return this.beanManager.resolveDecorators(arg0, arg1);
}