org.springframework.web.servlet.mvc.method.annotation

Class RequestResponseBodyMethodProcessor

java.lang.Object

org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor

org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor

All Implemented Interfaces:

HandlerMethodArgumentResolver, HandlerMethodReturnValueHandler

public class RequestResponseBodyMethodProcessor
extends AbstractMessageConverterMethodProcessor

Resolves method arguments annotated with @RequestBody and handles return values from methods annotated with @ResponseBody by reading and writing to the body of the request or response with an HttpMessageConverter.

An @RequestBody method argument is also validated if it is annotated with @javax.validation.Valid. In case of validation failure, MethodArgumentNotValidException is raised and results in a 400 response status code if DefaultHandlerExceptionResolver is configured.

Since:

3.1

Author:

Arjen Poutsma, Rossen Stoyanchev

Field Summary

Fields inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

allSupportedMediaTypes, logger, messageConverters

Constructor Summary

Constructors

Constructor and Description
RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> messageConverters)

Method Summary

Methods

Modifier and Type	Method and Description
void	handleReturnValue(Object returnValue, MethodParameter returnType, ModelAndViewContainer mavContainer, NativeWebRequest webRequest) Handle the given return value by adding attributes to the model and setting a view or setting the ModelAndViewContainer.setRequestHandled(boolean) flag to true to indicate the response has been handled directly.
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.
boolean	supportsReturnType(MethodParameter returnType) Whether the given method return type is supported by this handler.

Methods inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor

createOutputMessage, getProducibleMediaTypes, writeWithMessageConverters, writeWithMessageConverters

Methods inherited from class org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver

createInputMessage, readWithMessageConverters, readWithMessageConverters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RequestResponseBodyMethodProcessor

public RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> messageConverters)

Method Detail

supportsParameter

public boolean supportsParameter(MethodParameter parameter)

Description copied from interface: HandlerMethodArgumentResolver

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

supportsReturnType

public boolean supportsReturnType(MethodParameter returnType)

Description copied from interface: HandlerMethodReturnValueHandler

Whether the given method return type is supported by this handler.

Parameters:

returnType - the method return type to check

Returns:

true if this handler supports the supplied return type; false otherwise

resolveArgument

public Object resolveArgument(MethodParameter parameter,
                     ModelAndViewContainer mavContainer,
                     NativeWebRequest webRequest,
                     WebDataBinderFactory binderFactory)
                       throws 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.

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:

Exception - in case of errors with the preparation of argument values

handleReturnValue

public void handleReturnValue(Object returnValue,
                     MethodParameter returnType,
                     ModelAndViewContainer mavContainer,
                     NativeWebRequest webRequest)
                       throws IOException,
                              HttpMediaTypeNotAcceptableException

Description copied from interface: HandlerMethodReturnValueHandler

Handle the given return value by adding attributes to the model and setting a view or setting the ModelAndViewContainer.setRequestHandled(boolean) flag to true to indicate the response has been handled directly.

Parameters:

returnValue - the value returned from the handler method

returnType - the type of the return value. This type must have previously been passed to HandlerMethodReturnValueHandler.supportsReturnType(org.springframework.core.MethodParameter) and it must have returned true

mavContainer - the ModelAndViewContainer for the current request

webRequest - the current request

Throws:

IOException

HttpMediaTypeNotAcceptableException