Top Description Methods
org.springframework.web.method.support

public Interface HandlerMethodArgumentResolver

Known Direct Implementers
org.springframework.web.method.support.HandlerMethodArgumentResolverComposite, org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver, org.springframework.web.method.annotation.AbstractWebArgumentResolverAdapter, org.springframework.web.method.annotation.ErrorsMethodArgumentResolver, org.springframework.web.method.annotation.MapMethodProcessor, org.springframework.web.method.annotation.ModelAttributeMethodProcessor, org.springframework.web.method.annotation.ModelMethodProcessor, org.springframework.web.method.annotation.RequestHeaderMapMethodArgumentResolver, org.springframework.web.method.annotation.RequestParamMapMethodArgumentResolver, org.springframework.web.method.annotation.SessionStatusMethodArgumentResolver
Imports
org.springframework.core.MethodParameter, org.springframework.lang.Nullable, org.springframework.web.bind.WebDataBinder, org.springframework.web.bind.support.WebDataBinderFactory, org.springframework.web.context.request.NativeWebRequest
Strategy interface for resolving method parameters into argument values in the context of a given request.
Author
Arjen Poutsma
Since
3.1
See Also
HandlerMethodReturnValueHandler

Method Summary

Modifier and TypeMethod and Description
public Object

Returns:

the resolved argument value, or null if not resolvable
resolveArgument(MethodParameter
the method parameter to resolve. This parameter must have previously been passed to supportsParameter which must have returned true.
parameter, ModelAndViewContainer
the ModelAndViewContainer for the current request
mavContainer, NativeWebRequest
the current request
webRequest, WebDataBinderFactory
a factory for creating WebDataBinder instances
binderFactory)

Resolves a method parameter into an argument value from a given request.

public boolean

Returns:

true if this resolver supports the supplied parameter; false otherwise
supportsParameter(MethodParameter
the method parameter to check
parameter)

Whether the given method parameter is supported by this resolver.

Method Detail

resolveArgumentback to summary
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception

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.

Parameters
parameter:MethodParameter

the method parameter to resolve. This parameter must have previously been passed to supportsParameter which must have returned true.

mavContainer:ModelAndViewContainer

the ModelAndViewContainer for the current request

webRequest:NativeWebRequest

the current request

binderFactory:WebDataBinderFactory

a factory for creating WebDataBinder instances

Returns:Object

the resolved argument value, or null if not resolvable

Annotations
@Nullable
Exceptions
Exception:
in case of errors with the preparation of argument values
supportsParameterback to summary
public boolean supportsParameter(MethodParameter parameter)

Whether the given method parameter is supported by this resolver.

Parameters
parameter:MethodParameter

the method parameter to check

Returns:boolean

true if this resolver supports the supplied parameter; false otherwise