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java.lang.Objectorg.springframework.web.servlet.mvc.method.annotation.ModelAndViewResolverMethodReturnValueHandler
public class ModelAndViewResolverMethodReturnValueHandler
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.
| Constructor Summary | |
|---|---|
ModelAndViewResolverMethodReturnValueHandler(List<ModelAndViewResolver> mavResolvers)
Create a new instance. |
|
| Method Summary | |
|---|---|
void |
handleReturnValue(Object returnValue,
MethodParameter returnType,
ModelAndViewContainer mavContainer,
NativeWebRequest request)
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 |
|---|
public ModelAndViewResolverMethodReturnValueHandler(List<ModelAndViewResolver> mavResolvers)
| Method Detail |
|---|
public boolean supportsReturnType(MethodParameter returnType)
true. See class-level note.
supportsReturnType in interface HandlerMethodReturnValueHandlerreturnType - the method return type to check
true if this handler supports the supplied return type;
false otherwise
public void handleReturnValue(Object returnValue,
MethodParameter returnType,
ModelAndViewContainer mavContainer,
NativeWebRequest request)
throws Exception
HandlerMethodReturnValueHandlerModelAndViewContainer.setRequestHandled(boolean) flag to true
to indicate the response has been handled directly.
handleReturnValue in interface HandlerMethodReturnValueHandlerreturnValue - the value returned from the handler methodreturnType - 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 truemavContainer - the ModelAndViewContainer for the current requestrequest - the current request
Exception - if the return value handling results in an error
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