org.springframework.web.servlet.mvc.annotation
Class AnnotationMethodHandlerAdapter

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.support.WebContentGenerator
              org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter

All Implemented Interfaces:

ApplicationContextAware, ServletContextAware, HandlerAdapter

public class AnnotationMethodHandlerAdapter
extends WebContentGenerator
implements HandlerAdapter

Implementation of the HandlerAdapter interface that maps handler methods based on HTTP paths, HTTP methods and request parameters expressed through the RequestMapping annotation.

Supports request parameter binding through the RequestParam annotation. Also supports the ModelAttribute annotation for exposing model attribute values to the view, as well as InitBinder for binder initialization methods and SessionAttributes for automatic session management of specific attributes.

This adapter can be customized through various bean properties. A common use case is to apply shared binder initialization logic through a custom WebBindingInitializer.

Since:

2.5

Author:

Juergen Hoeller, Arjen Poutsma

See Also:

setPathMatcher(org.springframework.util.PathMatcher), setMethodNameResolver(org.springframework.web.servlet.mvc.multiaction.MethodNameResolver), setWebBindingInitializer(org.springframework.web.bind.support.WebBindingInitializer), setSessionAttributeStore(org.springframework.web.bind.support.SessionAttributeStore)

Field Summary

Fields inherited from class org.springframework.web.servlet.support.WebContentGenerator

METHOD_GET, METHOD_HEAD, METHOD_POST

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Constructor Summary

AnnotationMethodHandlerAdapter()

Method Summary

protected ServletRequestDataBinder	createBinder(HttpServletRequest request, Object target, String objectName) Template method for creating a new ServletRequestDataBinder instance.
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.
void	setAlwaysUseFullPath(boolean alwaysUseFullPath) Set if URL lookup should always use the full path within the current servlet context.
void	setMethodNameResolver(MethodNameResolver methodNameResolver) Set the MethodNameResolver to use for resolving default handler methods (carrying an empty @RequestMapping annotation).
void	setPathMatcher(PathMatcher pathMatcher) Set the PathMatcher implementation to use for matching URL paths against registered URL patterns.
void	setSessionAttributeStore(SessionAttributeStore sessionAttributeStore) Specify the strategy to store session attributes with.
void	setUrlDecode(boolean urlDecode) Set if context path and request URI should be URL-decoded.
void	setUrlPathHelper(UrlPathHelper urlPathHelper) Set the UrlPathHelper to use for resolution of lookup paths.
void	setWebBindingInitializer(WebBindingInitializer webBindingInitializer) Specify a WebBindingInitializer which will apply pre-configured configuration to every DataBinder that this controller uses.
boolean	supports(Object handler) Given a handler instance, return whether or not this HandlerAdapter can support it.

Methods inherited from class org.springframework.web.servlet.support.WebContentGenerator

applyCacheSeconds, applyCacheSeconds, cacheForSeconds, cacheForSeconds, checkAndPrepare, checkAndPrepare, getCacheSeconds, getSupportedMethods, isRequireSession, isUseCacheControlHeader, isUseCacheControlNoStore, isUseExpiresHeader, preventCaching, setCacheSeconds, setRequireSession, setSupportedMethods, setUseCacheControlHeader, setUseCacheControlNoStore, setUseExpiresHeader

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

AnnotationMethodHandlerAdapter

public AnnotationMethodHandlerAdapter()

Method Detail

setAlwaysUseFullPath

public void setAlwaysUseFullPath(boolean alwaysUseFullPath)

Set if URL lookup should always use the full path within the current servlet context. Else, the path within the current servlet mapping is used if applicable (that is, in the case of a ".../*" servlet mapping in web.xml).

Default is "false".

See Also:

UrlPathHelper.setAlwaysUseFullPath(boolean)

setUrlDecode

public void setUrlDecode(boolean urlDecode)

Set if context path and request URI should be URL-decoded. Both are returned undecoded by the Servlet API, in contrast to the servlet path.

Uses either the request encoding or the default encoding according to the Servlet spec (ISO-8859-1).

See Also:

UrlPathHelper.setUrlDecode(boolean)

setUrlPathHelper

public void setUrlPathHelper(UrlPathHelper urlPathHelper)

Set the UrlPathHelper to use for resolution of lookup paths.

Use this to override the default UrlPathHelper with a custom subclass, or to share common UrlPathHelper settings across multiple HandlerMappings and HandlerAdapters.

setPathMatcher

public void setPathMatcher(PathMatcher pathMatcher)

Set the PathMatcher implementation to use for matching URL paths against registered URL patterns. Default is AntPathMatcher.

See Also:

AntPathMatcher

setMethodNameResolver

public void setMethodNameResolver(MethodNameResolver methodNameResolver)

Set the MethodNameResolver to use for resolving default handler methods (carrying an empty @RequestMapping annotation).

Will only kick in when the handler method cannot be resolved uniquely through the annotation metadata already.

setWebBindingInitializer

public void setWebBindingInitializer(WebBindingInitializer webBindingInitializer)

Specify a WebBindingInitializer which will apply pre-configured configuration to every DataBinder that this controller uses.

setSessionAttributeStore

public void setSessionAttributeStore(SessionAttributeStore sessionAttributeStore)

Specify the strategy to store session attributes with.

Default is DefaultSessionAttributeStore, storing session attributes in the HttpSession, using the same attribute name as in the model.

supports

public boolean supports(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(HttpServletRequest request,
                           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 - 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:

Exception - in case of errors

getLastModified

public long getLastModified(HttpServletRequest request,
                            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)

createBinder

protected ServletRequestDataBinder createBinder(HttpServletRequest request,
                                                Object target,
                                                String objectName)
                                         throws Exception

Template method for creating a new ServletRequestDataBinder instance.

The default implementation creates a standard ServletRequestDataBinder. This can be overridden for custom ServletRequestDataBinder subclasses.

Parameters:

request - current HTTP request

target - the target object to bind onto (or null if the binder is just used to convert a plain parameter value)

objectName - the objectName of the target object

Returns:

the ServletRequestDataBinder instance to use

Throws:

Exception - in case of invalid state or arguments

See Also:

ServletRequestDataBinder.bind(javax.servlet.ServletRequest), DataBinder.convertIfNecessary(Object, Class, MethodParameter)