public class ErrorsMethodArgumentResolver extends java.lang.Object implements HandlerMethodArgumentResolver
Errors
method arguments.
An Errors
method argument is expected to appear immediately after
the model attribute in the method signature. It is resolved by expecting the
last two attributes added to the model to be the model attribute and its
BindingResult
.
Constructor and Description |
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ErrorsMethodArgumentResolver() |
Modifier and Type | Method and Description |
---|---|
java.lang.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.
|
public boolean supportsParameter(MethodParameter parameter)
HandlerMethodArgumentResolver
supportsParameter
in interface HandlerMethodArgumentResolver
parameter
- the method parameter to checktrue
if this resolver supports the supplied parameter;
false
otherwise@Nullable public java.lang.Object resolveArgument(MethodParameter parameter, @Nullable ModelAndViewContainer mavContainer, NativeWebRequest webRequest, @Nullable WebDataBinderFactory binderFactory) throws java.lang.Exception
HandlerMethodArgumentResolver
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.resolveArgument
in interface HandlerMethodArgumentResolver
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 requestwebRequest
- the current requestbinderFactory
- a factory for creating WebDataBinder
instancesnull
if not resolvablejava.lang.Exception
- in case of errors with the preparation of argument values