org.kuali.rice.krad.web.controller
Class UifControllerHandlerInterceptor

java.lang.Object
  org.kuali.rice.krad.web.controller.UifControllerHandlerInterceptor

All Implemented Interfaces:

org.springframework.web.servlet.HandlerInterceptor

public class UifControllerHandlerInterceptor
extends Object
implements org.springframework.web.servlet.HandlerInterceptor

Spring controller intercepter for KRAD controllers.

Provides infrastructure for preparing the form and view before and after the controller is invoked. Included in this is form session management and preparation of the view for rendering

Author:

Kuali Rice Team (rice.collab@kuali.org)

Constructor Summary

UifControllerHandlerInterceptor()

Method Summary

void	afterCompletion(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Object handler, Exception ex) After the view is rendered remove the view to reduce the size of the form storage in memory.
protected boolean	checkForViewMethodAccess(javax.servlet.http.HttpServletRequest request) Checks whether access to the handler method is allowed based on view configuration.
protected void	checkHandlerMethodAccess(javax.servlet.http.HttpServletRequest request, Object handler) Checks whether access is allowed for the requested controller method.
void	postHandle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Object handler, org.springframework.web.servlet.ModelAndView modelAndView) After the controller logic is executed, the form is placed into session and the corresponding view is prepared for rendering.
boolean	preHandle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Object handler) Before the controller executes the user session is set on GlobalVariables and messages are cleared, in addition setup for the history manager and a check on missing session forms is performed.

Methods inherited from class java.lang.Object

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

Constructor Detail

UifControllerHandlerInterceptor

public UifControllerHandlerInterceptor()

Method Detail

preHandle

public boolean preHandle(javax.servlet.http.HttpServletRequest request,
                         javax.servlet.http.HttpServletResponse response,
                         Object handler)
                  throws Exception

Before the controller executes the user session is set on GlobalVariables and messages are cleared, in addition setup for the history manager and a check on missing session forms is performed.

Specified by:

preHandle in interface org.springframework.web.servlet.HandlerInterceptor

Throws:

Exception

checkHandlerMethodAccess

protected void checkHandlerMethodAccess(javax.servlet.http.HttpServletRequest request,
                                        Object handler)
                                 throws Exception

Checks whether access is allowed for the requested controller method.

First a check is done on the method to determine whether it contains the annotation MethodAccessible. If so, access is allowed. If the annotation is not present, data from the posted view (if any) is referenced to determine whether the method was configured as an accessible method to call.

If method access is not allowed, a MethodAccessException is thrown.

Parameters:

request - HTTP request (used to retrieve parameters)

handler - handler method that was determined based on the request and mappings

Throws:

Exception

checkForViewMethodAccess

protected boolean checkForViewMethodAccess(javax.servlet.http.HttpServletRequest request)

Checks whether access to the handler method is allowed based on view configuration.

Since this method is invoked before the request form is setup, we need to retrieve the session form form the form manager. In the case of missing post data (GET requests), view method access is not granted.

Parameters:

request - HTTP request to retrieve parameters from

Returns:

boolean true if method access is allowed based on the view, false if not

postHandle

public void postHandle(javax.servlet.http.HttpServletRequest request,
                       javax.servlet.http.HttpServletResponse response,
                       Object handler,
                       org.springframework.web.servlet.ModelAndView modelAndView)
                throws Exception

After the controller logic is executed, the form is placed into session and the corresponding view is prepared for rendering.

Specified by:

postHandle in interface org.springframework.web.servlet.HandlerInterceptor

Throws:

Exception

afterCompletion

public void afterCompletion(javax.servlet.http.HttpServletRequest request,
                            javax.servlet.http.HttpServletResponse response,
                            Object handler,
                            Exception ex)
                     throws Exception

After the view is rendered remove the view to reduce the size of the form storage in memory.

Specified by:

afterCompletion in interface org.springframework.web.servlet.HandlerInterceptor

Throws:

Exception