Spring FlashScope

While waiting for FlashScope to be integrated into Spring 3.1 (it's scheduled for this release anyways), I came across this bug posting, which allowed me to incorporate a loose version of what should be available once 3.1 comes out.

My issue is that I seem to be unable to bind to values which are in Flash Scope. So for instance in my model I have the following code:

ModelAndView mav = new ModelAndView(someInjectedRedirectPage);
//Processing
mav.addObject("flashScope.someVar", someObject);

In my UI, using Velocity, I than attempt to bind to this object in the following manner:

##This is a velocimacro for those not familiar with velocity.
##It is basically like setting a path on a field utilizing the
##spring tag lib (e.x. <form:text path="flashScope")

#springBind("flashScope") 

However when I attempt to use that binding, I get the following exception:

java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'flashScope' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
at org.springframework.web.servlet.support.RequestContext.getBindStatus(RequestContext.java:720)bean name 'flashScope' available as request attribute...

However In my logs, I can clearly state that开发者_开发知识库 it's been added to the request. I can also do the following:

$flashScope.someVar.someProperty #The value prints fine this way.

Is there anyway to bind to a Map value (which isn't on a backing command object, but rather just on the request)?

Note if Do the following:

Map<String, String> map = new HashMap <String, String>(); 
map.put("key", "value");
mav.addObject("map", map);

I'm still not able to bind to the map...

Is this behavior I can modify by extending the WebBindingInitializer? Would simply wrapping the FlashScopeMap into another object rectify the problem?

Wrapping into another object has been the only way I've been able to resolve this issue.