Package javax.faces.context

Class ExternalContextFactory

java.lang.Object

javax.faces.context.ExternalContextFactory

All Implemented Interfaces:

FacesWrapper<ExternalContextFactory>

public abstract class ExternalContextFactory
extends Object
implements FacesWrapper<ExternalContextFactory>

ExternalContextFactory is a factory object that creates (if needed) and returns new ExternalContext instances, initialized for the processing of the specified request and response objects.

There must be one ExternalContextFactory instance per web application that is utilizing JavaServer Faces. This instance can be acquired, in a portable manner, by calling:

   ExternalContextFactory factory = (ExternalContextFactory)
    FactoryFinder.getFactory(FactoryFinder.EXTERNAL_CONTEXT_FACTORY);
 

Usage: extend this class and push the implementation being wrapped to the constructor and use getWrapped() to access the instance being wrapped.

Constructor Summary

Constructors

Constructor	Description
ExternalContextFactory()	Deprecated. Use the other constructor taking the implementation being wrapped.
ExternalContextFactory(ExternalContextFactory wrapped)	If this factory has been decorated, the implementation doing the decorating should push the implementation being wrapped to this constructor.

Method Summary

Modifier and Type	Method	Description
abstract ExternalContext	getExternalContext(Object context, Object request, Object response)	Create (if needed) and return an ExternalContext instance that is initialized for the processing of the specified request and response objects, for this web application.
ExternalContextFactory	getWrapped()	If this factory has been decorated, the implementation doing the decorating may override this method to provide access to the implementation being wrapped.

Methods inherited from class java.lang.Object

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

Constructor Details

ExternalContextFactory

@Deprecated
public ExternalContextFactory()

Deprecated.

Use the other constructor taking the implementation being wrapped.

ExternalContextFactory

public ExternalContextFactory(ExternalContextFactory wrapped)

If this factory has been decorated, the implementation doing the decorating should push the implementation being wrapped to this constructor. The getWrapped() will then return the implementation being wrapped.

Parameters:

wrapped - The implementation being wrapped.

Method Details

getWrapped

public ExternalContextFactory getWrapped()

If this factory has been decorated, the implementation doing the decorating may override this method to provide access to the implementation being wrapped.

Specified by:

getWrapped in interface FacesWrapper<ExternalContextFactory>

Returns:

the wrapped instance.

Since:

2.0

getExternalContext

public abstract ExternalContext getExternalContext(Object context,
 Object request,
 Object response)
                                            throws FacesException

Create (if needed) and return an ExternalContext instance that is initialized for the processing of the specified request and response objects, for this web application.

Parameters:

context - In servlet environments, the ServletContext that is associated with this web application

request - In servlet environments, the ServletRequest that is to be processed

response - In servlet environments, the ServletResponse that is to be processed

Returns:

the instance of ExternalContext.

Throws:

FacesException - if a ExternalContext cannot be constructed for the specified parameters

NullPointerException - if any of the parameters are null