org.springframework.web.servlet.handler
Class HandlerInterceptorAdapter

java.lang.Object
  org.springframework.web.servlet.handler.HandlerInterceptorAdapter

All Implemented Interfaces:

HandlerInterceptor

Direct Known Subclasses:

LocaleChangeInterceptor, OpenPersistenceManagerInViewInterceptor, ThemeChangeInterceptor, UserRoleAuthorizationInterceptor

public abstract class HandlerInterceptorAdapter
extends Object
implements HandlerInterceptor

Abstract adapter class for the HandlerInterceptor interface, for simplified implementation of pre-only/post-only interceptors.

Since:

05.12.2003

Author:

Juergen Hoeller

Constructor Summary

HandlerInterceptorAdapter()

Method Summary

void	afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) This implementation is empty.
void	postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) This implementation is empty.
boolean	preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) This implementation always returns true.

Methods inherited from class java.lang.Object

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

Constructor Detail

HandlerInterceptorAdapter

public HandlerInterceptorAdapter()

Method Detail

preHandle

public boolean preHandle(HttpServletRequest request,
                         HttpServletResponse response,
                         Object handler)
                  throws Exception

This implementation always returns true.

Specified by:

preHandle in interface HandlerInterceptor

Parameters:

request - current HTTP request

response - current HTTP response

handler - chosen handler to execute, for type and/or instance evaluation

Returns:

true if the execution chain should proceed with the next interceptor or the handler itself. Else, DispatcherServlet assumes that this interceptor has already dealt with the response itself.

Throws:

Exception - in case of errors

postHandle

public void postHandle(HttpServletRequest request,
                       HttpServletResponse response,
                       Object handler,
                       ModelAndView modelAndView)
                throws Exception

This implementation is empty.

Specified by:

postHandle in interface HandlerInterceptor

Parameters:

request - current HTTP request

response - current HTTP response

handler - chosen handler to execute, for type and/or instance examination

modelAndView - the ModelAndView that the handler returned, can also be null

Throws:

Exception - in case of errors

afterCompletion

public void afterCompletion(HttpServletRequest request,
                            HttpServletResponse response,
                            Object handler,
                            Exception ex)
                     throws Exception

This implementation is empty.

Specified by:

afterCompletion in interface HandlerInterceptor

Parameters:

request - current HTTP request

response - current HTTP response

handler - chosen handler to execute, for type and/or instance examination

ex - exception thrown on handler execution, if any (only included as additional context information for the case where a handler threw an exception; request execution may have failed even when this argument is null)

Throws:

Exception - in case of errors