public class HttpRequestHandlerAdapter extends Object implements HandlerAdapter
HttpRequestHandler
interface with the generic DispatcherServlet
.
Supports handlers that implement the LastModified
interface.
This is an SPI class, not used directly by application code.
DispatcherServlet
,
HttpRequestHandler
,
LastModified
,
SimpleControllerHandlerAdapter
Constructor and Description |
---|
HttpRequestHandlerAdapter() |
Modifier and Type | Method and Description |
---|---|
long |
getLastModified(HttpServletRequest request,
Object handler)
Same contract as for HttpServlet's
getLastModified method. |
ModelAndView |
handle(HttpServletRequest request,
HttpServletResponse response,
Object handler)
Use the given handler to handle this request.
|
boolean |
supports(Object handler)
Given a handler instance, return whether or not this
HandlerAdapter
can support it. |
public boolean supports(Object handler)
HandlerAdapter
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);
supports
in interface HandlerAdapter
handler
- the handler object to check@Nullable public ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception
HandlerAdapter
handle
in interface HandlerAdapter
request
- current HTTP requestresponse
- current HTTP responsehandler
- the handler to use. This object must have previously been passed
to the supports
method of this interface, which must have
returned true
.null
if the request has been handled directlyException
- in case of errorspublic long getLastModified(HttpServletRequest request, Object handler)
HandlerAdapter
getLastModified
method.
Can simply return -1 if there's no support in the handler class.getLastModified
in interface HandlerAdapter
request
- current HTTP requesthandler
- the handler to useHttpServlet.getLastModified(javax.servlet.http.HttpServletRequest)
,
LastModified.getLastModified(javax.servlet.http.HttpServletRequest)