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

Class ModelAndViewResolverMethodReturnValueHandler

java.lang.Object

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

All Implemented Interfaces:

org.springframework.web.method.support.HandlerMethodReturnValueHandler

public class ModelAndViewResolverMethodReturnValueHandler
extends Object
implements org.springframework.web.method.support.HandlerMethodReturnValueHandler

This return value handler is intended to be ordered after all others as it attempts to handle _any_ return value type (i.e. returns true for all return types).

The return value is handled either with a ModelAndViewResolver or otherwise by regarding it as a model attribute if it is a non-simple type. If neither of these succeeds (essentially simple type other than String), UnsupportedOperationException is raised.

Note: This class is primarily needed to support ModelAndViewResolver, which unfortunately cannot be properly adapted to the HandlerMethodReturnValueHandler contract since the HandlerMethodReturnValueHandler.supportsReturnType(org.springframework.core.MethodParameter) method cannot be implemented. Hence ModelAndViewResolvers are limited to always being invoked at the end after all other return value handlers have been given a chance. It is recommended to re-implement a ModelAndViewResolver as HandlerMethodReturnValueHandler, which also provides better access to the return type and method information.

Since:

3.1

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor	Description
ModelAndViewResolverMethodReturnValueHandler(List<ModelAndViewResolver> mavResolvers)	Create a new instance.

Method Summary

Modifier and Type	Method	Description
void	handleReturnValue(Object returnValue, org.springframework.core.MethodParameter returnType, org.springframework.web.method.support.ModelAndViewContainer mavContainer, org.springframework.web.context.request.NativeWebRequest webRequest)
boolean	supportsReturnType(org.springframework.core.MethodParameter returnType)	Always returns true.

Methods inherited from class java.lang.Object

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

Constructor Details

ModelAndViewResolverMethodReturnValueHandler

public ModelAndViewResolverMethodReturnValueHandler(@Nullable
 List<ModelAndViewResolver> mavResolvers)

Create a new instance.

Method Details

supportsReturnType

public boolean supportsReturnType(org.springframework.core.MethodParameter returnType)

Always returns true. See class-level note.

Specified by:

supportsReturnType in interface org.springframework.web.method.support.HandlerMethodReturnValueHandler

handleReturnValue

public void handleReturnValue(@Nullable
 Object returnValue,
 org.springframework.core.MethodParameter returnType,
 org.springframework.web.method.support.ModelAndViewContainer mavContainer,
 org.springframework.web.context.request.NativeWebRequest webRequest)
                       throws Exception

Specified by:

handleReturnValue in interface org.springframework.web.method.support.HandlerMethodReturnValueHandler

Throws:

Exception