Spring Framework

org.springframework.web.method.annotation
Class ErrorsMethodArgumentResolver

java.lang.Object
  extended by org.springframework.web.method.annotation.ErrorsMethodArgumentResolver
All Implemented Interfaces:
HandlerMethodArgumentResolver

public class ErrorsMethodArgumentResolver
extends java.lang.Object
implements HandlerMethodArgumentResolver

Resolves 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.

Since:
3.1
Author:
Rossen Stoyanchev

Constructor Summary
ErrorsMethodArgumentResolver()
           
 
Method Summary
 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.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ErrorsMethodArgumentResolver

public ErrorsMethodArgumentResolver()
Method Detail

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 java.lang.Object resolveArgument(MethodParameter parameter,
                                        ModelAndViewContainer mavContainer,
                                        NativeWebRequest webRequest,
                                        WebDataBinderFactory binderFactory)
                                 throws java.lang.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) and it 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.
Throws:
java.lang.Exception - in case of errors with the preparation of argument values

Spring Framework