Spring Framework

org.springframework.web.servlet.mvc
Class HttpRequestHandlerAdapter

java.lang.Object
  extended by org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter
All Implemented Interfaces:
HandlerAdapter

public class HttpRequestHandlerAdapter
extends java.lang.Object
implements HandlerAdapter

Adapter to use the plain HttpRequestHandler interface with the generic DispatcherServlet. Supports handlers that implement the LastModified interface.

This is an SPI class, not used directly by application code.

Since:
2.0
Author:
Juergen Hoeller
See Also:
DispatcherServlet, HttpRequestHandler, LastModified, SimpleControllerHandlerAdapter

Constructor Summary
HttpRequestHandlerAdapter()
           
 
Method Summary
 long getLastModified(javax.servlet.http.HttpServletRequest request, java.lang.Object handler)
          Same contract as for HttpServlet's getLastModified method.
 ModelAndView handle(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, java.lang.Object handler)
          Use the given handler to handle this request.
 boolean supports(java.lang.Object handler)
          Given a handler instance, return whether or not this HandlerAdapter can support it.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

HttpRequestHandlerAdapter

public HttpRequestHandlerAdapter()
Method Detail

supports

public boolean supports(java.lang.Object handler)
Description copied from interface: HandlerAdapter
Given a handler instance, return whether or not this HandlerAdapter can support it. Typical HandlerAdapters will base the decision on the handler type. HandlerAdapters will usually only support one handler type each.

A typical implementation:

return (handler instanceof MyHandler);

Specified by:
supports in interface HandlerAdapter
Parameters:
handler - handler object to check
Returns:
whether or not this object can use the given handler

handle

public ModelAndView handle(javax.servlet.http.HttpServletRequest request,
                           javax.servlet.http.HttpServletResponse response,
                           java.lang.Object handler)
                    throws java.lang.Exception
Description copied from interface: HandlerAdapter
Use the given handler to handle this request. The workflow that is required may vary widely.

Specified by:
handle in interface HandlerAdapter
Parameters:
request - current HTTP request
response - current HTTP response
handler - handler to use. This object must have previously been passed to the supports method of this interface, which must have returned true.
Returns:
ModelAndView object with the name of the view and the required model data, or null if the request has been handled directly
Throws:
java.lang.Exception - in case of errors

getLastModified

public long getLastModified(javax.servlet.http.HttpServletRequest request,
                            java.lang.Object handler)
Description copied from interface: HandlerAdapter
Same contract as for HttpServlet's getLastModified method. Can simply return -1 if there's no support in the handler class.

Specified by:
getLastModified in interface HandlerAdapter
Parameters:
request - current HTTP request
handler - handler to use
Returns:
the lastModified value for the given handler
See Also:
HttpServlet.getLastModified(javax.servlet.http.HttpServletRequest), LastModified.getLastModified(javax.servlet.http.HttpServletRequest)

Spring Framework