java.lang.Object
- org.springframework.web.servlet.mvc.method.annotation.ModelAndViewResolverMethodReturnValueHandler

All Implemented Interfaces:
HandlerMethodReturnValueHandler
```
public class ModelAndViewResolverMethodReturnValueHandler
extends Object
implements 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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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.
`boolean`	`supportsReturnType(MethodParameter returnType)`	Always returns `true`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ModelAndViewResolverMethodReturnValueHandler
```
public ModelAndViewResolverMethodReturnValueHandler(List<ModelAndViewResolver> mavResolvers)
```
    Create a new instance.
- Method Detail
  - supportsReturnType
```
public boolean supportsReturnType(MethodParameter returnType)
```
    Always returns true. See class-level note.
    Specified by:
    supportsReturnType in interface HandlerMethodReturnValueHandler
    Parameters:
    returnType - the method return type to check
    Returns:
    true if this handler supports the supplied return type; false otherwise
  - handleReturnValue
```
public void handleReturnValue(Object returnValue,
                              MethodParameter returnType,
                              ModelAndViewContainer mavContainer,
                              NativeWebRequest webRequest)
                       throws Exception
```
    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.
    Specified by:
    handleReturnValue in interface HandlerMethodReturnValueHandler
    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:
    Exception - if the return value handling results in an error

Class ModelAndViewResolverMethodReturnValueHandler

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ModelAndViewResolverMethodReturnValueHandler

Method Detail

supportsReturnType

handleReturnValue