org.springframework.web.servlet.resource

Class ResourceUrlProviderExposingInterceptor

java.lang.Object

org.springframework.web.servlet.resource.ResourceUrlProviderExposingInterceptor

All Implemented Interfaces:

HandlerInterceptor

public class ResourceUrlProviderExposingInterceptor
extends Object
implements HandlerInterceptor

An interceptor that exposes the ResourceUrlProvider instance it is configured with as a request attribute.

Since:

4.1

Author:

Rossen Stoyanchev

Field Summary

Fields

Modifier and Type	Field and Description
static String	RESOURCE_URL_PROVIDER_ATTR Name of the request attribute that holds the ResourceUrlProvider.

Constructor Summary

Constructors

Constructor and Description
ResourceUrlProviderExposingInterceptor(ResourceUrlProvider resourceUrlProvider)

Method Summary

Modifier and Type	Method and Description
boolean	preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) Intercept the execution of a handler.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.web.servlet.HandlerInterceptor

afterCompletion, postHandle

Field Detail

RESOURCE_URL_PROVIDER_ATTR

public static final String RESOURCE_URL_PROVIDER_ATTR

Name of the request attribute that holds the ResourceUrlProvider.

Constructor Detail

ResourceUrlProviderExposingInterceptor

public ResourceUrlProviderExposingInterceptor(ResourceUrlProvider resourceUrlProvider)

Method Detail

preHandle

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

Description copied from interface: HandlerInterceptor

Intercept the execution of a handler. Called after HandlerMapping determined an appropriate handler object, but before HandlerAdapter invokes the handler.

DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can decide to abort the execution chain, typically sending an HTTP error or writing a custom response.

Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

The default implementation 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