Package org.shredzone.commons.view

Class EmptyViewInterceptor

java.lang.Object

org.shredzone.commons.view.EmptyViewInterceptor

All Implemented Interfaces:

ViewInterceptor

@ParametersAreNonnullByDefault
public class EmptyViewInterceptor
extends Object
implements ViewInterceptor

A ViewInterceptor that does nothing. May be used as a base class for interceptor implementations.

Author:

Richard "Shred" Körber

Constructor Summary

Constructors

Constructor	Description
EmptyViewInterceptor()

Method Summary

Modifier and Type	Method	Description
boolean	onErrorResponse(ErrorResponseException ex, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)	Called when an ErrorResponseException occured.
String	onRendering(String template, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)	Called when a ViewHandler successfully processed the request and returned a template string that is now to be rendered.
void	onRequest(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)	Called when a HTTP request was sent to the view service.
void	onViewHandlerInvocation(ViewContext context, Object bean, Method method)	Called when a ViewHandler is about to be invoked.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyViewInterceptor

public EmptyViewInterceptor()

Method Detail

onRequest

public void onRequest(javax.servlet.http.HttpServletRequest req,
                      javax.servlet.http.HttpServletResponse resp)

Description copied from interface: ViewInterceptor

Called when a HTTP request was sent to the view service. The request has not yet been processed.

Specified by:

onRequest in interface ViewInterceptor

Parameters:

req - HttpServletRequest to be handled

resp - HttpServletResponse with the response

onViewHandlerInvocation

public void onViewHandlerInvocation(ViewContext context,
                                    Object bean,
                                    Method method)

Description copied from interface: ViewInterceptor

Called when a ViewHandler is about to be invoked.

Specified by:

onViewHandlerInvocation in interface ViewInterceptor

Parameters:

context - ViewContext passed to the view handler

bean - Spring bean containing the view handler

method - View handler method that will be invoked

onRendering

public String onRendering(String template,
                          javax.servlet.http.HttpServletRequest req,
                          javax.servlet.http.HttpServletResponse resp)

Description copied from interface: ViewInterceptor

Called when a ViewHandler successfully processed the request and returned a template string that is now to be rendered. The interceptor can change the template name.

Specified by:

onRendering in interface ViewInterceptor

Parameters:

template - Template name returned by the view handler

req - HttpServletRequest that was handled

resp - HttpServletResponse with the response

Returns:

a different template name, or null for keeping the original template name

onErrorResponse

public boolean onErrorResponse(ErrorResponseException ex,
                               javax.servlet.http.HttpServletRequest req,
                               javax.servlet.http.HttpServletResponse resp)

Description copied from interface: ViewInterceptor

Called when an ErrorResponseException occured. The interceptor is able to catch the error.

Specified by:

onErrorResponse in interface ViewInterceptor

Parameters:

ex - ErrorResponseException that occured

req - HttpServletRequest that led to this error

resp - HttpServletResponse with the response

Returns:

true if the interceptor responded to the error. Other interceptors will not be invoked, and the HttpServletResponse is sent back. false if the error handling shall be continued.