Interface HandlerMethodArgumentResolver
- All Known Implementing Classes:
AbstractCookieValueMethodArgumentResolver
,AbstractNamedValueMethodArgumentResolver
,AbstractWebArgumentResolverAdapter
,ErrorsMethodArgumentResolver
,ExpressionValueMethodArgumentResolver
,HandlerMethodArgumentResolverComposite
,MapMethodProcessor
,ModelAttributeMethodProcessor
,ModelMethodProcessor
,RequestHeaderMapMethodArgumentResolver
,RequestHeaderMethodArgumentResolver
,RequestParamMapMethodArgumentResolver
,RequestParamMethodArgumentResolver
,SessionStatusMethodArgumentResolver
public interface HandlerMethodArgumentResolver
Strategy interface for resolving method parameters into argument values in
the context of a given request.
- Since:
- 3.1
- Author:
- Arjen Poutsma
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionresolveArgument
(org.springframework.core.MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) Resolves a method parameter into an argument value from a given request.boolean
supportsParameter
(org.springframework.core.MethodParameter parameter) Whether the given method parameter is supported by this resolver.
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Method Details
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supportsParameter
boolean supportsParameter(org.springframework.core.MethodParameter parameter) Whether the given method parameter is supported by this resolver.- Parameters:
parameter
- the method parameter to check- Returns:
true
if this resolver supports the supplied parameter;false
otherwise
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resolveArgument
@Nullable Object resolveArgument(org.springframework.core.MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer, NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws Exception Resolves a method parameter into an argument value from a given request. AModelAndViewContainer
provides access to the model for the request. AWebDataBinderFactory
provides a way to create aWebDataBinder
instance when needed for data binding and type conversion purposes.- Parameters:
parameter
- the method parameter to resolve. This parameter must have previously been passed tosupportsParameter(org.springframework.core.MethodParameter)
which must have returnedtrue
.mavContainer
- the ModelAndViewContainer for the current requestwebRequest
- the current requestbinderFactory
- a factory for creatingWebDataBinder
instances- Returns:
- the resolved argument value, or
null
if not resolvable - Throws:
Exception
- in case of errors with the preparation of argument values
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