public class HandlerFunctionAdapter extends Object implements HandlerAdapter, Ordered
HandlerAdapter
implementation that supports HandlerFunction
s.HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE
Constructor and Description |
---|
HandlerFunctionAdapter() |
Modifier and Type | Method and Description |
---|---|
long |
getLastModified(HttpServletRequest request,
Object handler)
Same contract as for HttpServlet's
getLastModified method. |
int |
getOrder()
Get the order value of this object.
|
ModelAndView |
handle(HttpServletRequest servletRequest,
HttpServletResponse servletResponse,
Object handler)
Use the given handler to handle this request.
|
void |
setOrder(int order)
Specify the order value for this HandlerAdapter bean.
|
boolean |
supports(Object handler)
Given a handler instance, return whether or not this
HandlerAdapter
can support it. |
public void setOrder(int order)
The default value is Ordered.LOWEST_PRECEDENCE
, meaning non-ordered.
Ordered.getOrder()
public int getOrder()
Ordered
Higher values are interpreted as lower priority. As a consequence,
the object with the lowest value has the highest priority (somewhat
analogous to Servlet load-on-startup
values).
Same order values will result in arbitrary sort positions for the affected objects.
getOrder
in interface Ordered
Ordered.HIGHEST_PRECEDENCE
,
Ordered.LOWEST_PRECEDENCE
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 servletRequest, HttpServletResponse servletResponse, Object handler) throws Exception
HandlerAdapter
handle
in interface HandlerAdapter
servletRequest
- current HTTP requestservletResponse
- 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)