Contexts and Dependency Injection - Introducing Java EE 7 - page 100

In the previous example, the getBeanName method will return the String -based name of the bean, and
getBeanScope will return the Annotation class for the bean scope. The Class<? extends Annotation> is a generic
syntax that designates an Annotation type class. Table 7-1 lists the different methods available from the Bean interface
for obtaining metadata, along with a brief description of each.

Table 7-1. Bean Interface Methods for Obtaining Metadata

Method Returns Description

getBeanClass Class<?>

Returns the bean class of the managed or
session bean, or of the bean that declares the
producer method or field.

getInjectionPoints Set<InjectionPoint> Returns the InjectionPoint objects of the bean.

getName String Returns the EL name of the bean, if it exists.

Set<Annotation>

getQualifiers Returns the bean's qualifiers.

getScope Class<? extends Annotation> Returns the scope of the bean.

getStereotypes Set<Class ? extends Annotation> Returns the stereotypes of the bean.

getTypes Set<Type> Returns the types of the bean.

isAlternative boolean Determines whether the bean is an alternative.

isNullable boolean Determines whether the create() method may

return a null value.

Injection of the ServletContext
It is now possible to inject ServletContext into application classes using the javax.servlet.ServletContext
bean type. Doing so allows control of the servlet context for a particular application. As such, one can add listeners,
create filters, work with attributes, and so on, just as if a bean were a standard Java servlet class. To inject the
ServletContext , write the following code:

@Inject
ServletContext context;

Let's take a look at how you can use the ServletContext information from a JSF application. Suppose that you
want to display the server information on a JSF view. In the following code for org.javaee7.jsf.AcmeBean , the
ServletContext is injected using the new enhancement, and data from it is made available for use in a JSF view:

package org.javaee7.jsf;

...
import javax.servlet.ServletContext;

@ManagedBean(name = "acmeBean")
@SessionScoped
public class AcmeBean implements Serializable {
@EJB
private AcmeFacade facade;