I have a constructor that takes a string. I am intentionally passing blank when I do a:

<constructor-arg value=""/>

Spring AS throws this error, rather than passing null or "" to my constructor

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at org.springextensions.actionscript.ioc.factory.xml. parser.support.nodeparsers::KeyValueNodeParser/parse()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parsePropertyValue()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parseProperty()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parseConstructorArguments()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parseObjectDefinition()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parseAndRegisterObjectDefinition()
at org.springextensions.actionscript.ioc.factory.xml. parser.support::XMLObjectDefinitionsParser/parse()
at org.springextensions.actionscript.ioc.factory.xml: :XMLObjectFactory/_doParse()
at org.springextensions.actionscript.ioc.factory.xml: :XMLObjectFactory/_loadNextProperties()
at org.springextensions.actionscript.ioc.factory.xml: :XMLObjectFactory/_loadNextConfigLocation()
at org.springextensions.actionscript.ioc.factory.xml: :XMLObjectFactory/_onLoaderComplete()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.net::URLLoader/onComplete()