Package org.springframework.web.method.annotation

Class RequestParamMapMethodArgumentResolver

java.lang.Object

org.springframework.web.method.annotation.RequestParamMapMethodArgumentResolver

All Implemented Interfaces:

HandlerMethodArgumentResolver

public class RequestParamMapMethodArgumentResolver
extends Object
implements HandlerMethodArgumentResolver

Resolves Map method arguments annotated with an @RequestParam where the annotation does not specify a request parameter name.

The created Map contains all request parameter name/value pairs, or all multipart files for a given parameter name if specifically declared with MultipartFile as the value type. If the method parameter type is MultiValueMap instead, the created map contains all request parameters and all their values for cases where request parameters have multiple values (or multiple multipart files of the same name).

Since:

3.1

Author:

Arjen Poutsma, Rossen Stoyanchev, Juergen Hoeller

See Also:

• RequestParamMethodArgumentResolver
• ServletRequest.getParameterMap()
• MultipartRequest.getMultiFileMap()
• MultipartRequest.getFileMap()

Constructor Summary

Constructors

Constructor	Description
RequestParamMapMethodArgumentResolver()

Method Summary

Modifier and Type	Method	Description
Object	resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory)	Resolves a method parameter into an argument value from a given request.
boolean	supportsParameter(MethodParameter parameter)	Whether the given method parameter is supported by this resolver.

Methods inherited from class java.lang.Object

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

Constructor Details

RequestParamMapMethodArgumentResolver

public RequestParamMapMethodArgumentResolver()

Method Details

supportsParameter

public boolean supportsParameter(MethodParameter parameter)

Description copied from interface: HandlerMethodArgumentResolver

Whether the given method parameter is supported by this resolver.

Specified by:

supportsParameter in interface HandlerMethodArgumentResolver

Parameters:

parameter - the method parameter to check

Returns:

true if this resolver supports the supplied parameter; false otherwise

resolveArgument

public Object resolveArgument(MethodParameter parameter,
 @Nullable
 ModelAndViewContainer mavContainer,
 NativeWebRequest webRequest,
 @Nullable
 WebDataBinderFactory binderFactory)
                       throws Exception

Description copied from interface: HandlerMethodArgumentResolver

Resolves a method parameter into an argument value from a given request. A ModelAndViewContainer provides access to the model for the request. A WebDataBinderFactory provides a way to create a WebDataBinder instance when needed for data binding and type conversion purposes.

Specified by:

resolveArgument in interface HandlerMethodArgumentResolver

Parameters:

parameter - the method parameter to resolve. This parameter must have previously been passed to HandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter) which must have returned true.

mavContainer - the ModelAndViewContainer for the current request

webRequest - the current request

binderFactory - a factory for creating WebDataBinder instances

Returns:

the resolved argument value, or null if not resolvable

Throws:

Exception - in case of errors with the preparation of argument values