Package 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 any annotations that trigger validation. In case of validation failure, MethodArgumentNotValidException is raised and results in an HTTP 400 response status code if DefaultHandlerExceptionResolver is configured.

Since:

3.1

Author:

Arjen Poutsma, Rossen Stoyanchev, Juergen Hoeller

Field Summary

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

logger, messageConverters

Constructor Summary

Constructors

Constructor	Description
RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters)	Basic constructor with converters only.
RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters, List<Object> requestResponseBodyAdvice)	Complete constructor for resolving @RequestBody method arguments.
RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters, ContentNegotiationManager manager)	Basic constructor with converters and ContentNegotiationManager.
RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters, ContentNegotiationManager manager, List<Object> requestResponseBodyAdvice)	Complete constructor for resolving @RequestBody and handling @ResponseBody.

Method Summary

Modifier and Type	Method	Description
protected boolean	checkRequired(MethodParameter parameter)
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.
protected <T> Object	readWithMessageConverters(NativeWebRequest webRequest, MethodParameter parameter, Type paramType)	Create the method argument value of the expected parameter type by reading from the given request.
Object	resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory)	Throws MethodArgumentNotValidException if validation fails.
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, getProducibleMediaTypes, getReturnValueType, isResourceType, writeWithMessageConverters, writeWithMessageConverters

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

adaptArgumentIfNecessary, createInputMessage, getSupportedMediaTypes, isBindExceptionRequired, readWithMessageConverters, validateIfApplicable

Methods inherited from class java.lang.Object

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

Constructor Details

RequestResponseBodyMethodProcessor

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

Basic constructor with converters only. Suitable for resolving @RequestBody. For handling @ResponseBody consider also providing a ContentNegotiationManager.

RequestResponseBodyMethodProcessor

public RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters,
 @Nullable
 ContentNegotiationManager manager)

Basic constructor with converters and ContentNegotiationManager. Suitable for resolving @RequestBody and handling @ResponseBody without Request~ or ResponseBodyAdvice.

RequestResponseBodyMethodProcessor

public RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters,
 @Nullable
 List<Object> requestResponseBodyAdvice)

Complete constructor for resolving @RequestBody method arguments. For handling @ResponseBody consider also providing a ContentNegotiationManager.

Since:

4.2

RequestResponseBodyMethodProcessor

public RequestResponseBodyMethodProcessor(List<HttpMessageConverter<?>> converters,
 @Nullable
 ContentNegotiationManager manager,
 @Nullable
 List<Object> requestResponseBodyAdvice)

Complete constructor for resolving @RequestBody and handling @ResponseBody.

Method Details

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

@Nullable
public Object resolveArgument(MethodParameter parameter,
 @Nullable
 ModelAndViewContainer mavContainer,
 NativeWebRequest webRequest,
 @Nullable
 WebDataBinderFactory binderFactory)
                       throws Exception

Throws MethodArgumentNotValidException if validation fails.

Parameters:

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 request

webRequest - the current request

binderFactory - a factory for creating WebDataBinder instances

Returns:

the resolved argument value, or null if not resolvable

Throws:

HttpMessageNotReadableException - if RequestBody.required() is true and there is no body content or if there is no suitable converter to read the content with.

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

readWithMessageConverters

@Nullable
protected <T> Object readWithMessageConverters(NativeWebRequest webRequest,
 MethodParameter parameter,
 Type paramType)
                                        throws IOException,
HttpMediaTypeNotSupportedException,
HttpMessageNotReadableException

Description copied from class: AbstractMessageConverterMethodArgumentResolver

Create the method argument value of the expected parameter type by reading from the given request.

Overrides:

readWithMessageConverters in class AbstractMessageConverterMethodArgumentResolver

Type Parameters:

T - the expected type of the argument value to be created

Parameters:

webRequest - the current request

parameter - the method parameter descriptor (may be null)

paramType - the type of the argument value to be created

Returns:

the created method argument value

Throws:

IOException - if the reading from the request fails

HttpMediaTypeNotSupportedException - if no suitable message converter is found

HttpMessageNotReadableException

checkRequired

protected boolean checkRequired(MethodParameter parameter)

handleReturnValue

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

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) which must have returned true.

mavContainer - the ModelAndViewContainer for the current request

webRequest - the current request

Throws:

IOException

HttpMediaTypeNotAcceptableException

HttpMessageNotWritableException