Package org.springframework.web.method.support

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 Type
    Method
    Description
    Object
    resolveArgument(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.

  • Method Details

    • 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

    • 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. 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 - the method parameter to resolve. This parameter must have previously been passed to 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