Class HttpRequestHandlerAdapter

java.lang.Object

org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter

All Implemented Interfaces:

HandlerAdapter

public class HttpRequestHandlerAdapter
extends Object
implements HandlerAdapter

Adapter to use the plain HttpRequestHandler interface with the generic DispatcherServlet.

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

Since:

2.0

Author:

Juergen Hoeller

See Also:

• DispatcherServlet
• HttpRequestHandler
• SimpleControllerHandlerAdapter

Constructor Summary

Constructors

Constructor	Description
HttpRequestHandlerAdapter()

Method Summary

Modifier and Type	Method	Description
@Nullable ModelAndView	handle(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, Object handler)	Use the given handler to handle this request.
boolean	supports(Object handler)	Given a handler instance, return whether this HandlerAdapter can support it.

Methods inherited from class Object

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

Constructor Details

HttpRequestHandlerAdapter

public HttpRequestHandlerAdapter()

Method Details

supports

public boolean supports(Object handler)

Description copied from interface: HandlerAdapter

Given a handler instance, return whether 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 - the handler object to check

Returns:

whether this object can use the given handler

handle

public @Nullable ModelAndView handle(jakarta.servlet.http.HttpServletRequest request,
 jakarta.servlet.http.HttpServletResponse response,
 Object handler)
                              throws 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 - the handler to use. This object must have previously been passed to the supports method of this interface, which must have returned true.

Returns:

a ModelAndView object with the name of the view and the required model data, or null if the request has been handled directly

Throws:

Exception - in case of errors