OSB: send dateTime do Java Callout method

Hi,
I have a method in Java that receives a parameter of type java.util.Date and I want to invoke that method in an OSB Java Callout Activity.
I receive in the OSB 11g service input an element of type xs:dateTime and I want to send it to the Java method this element. But it always result in exception: argument type mismatch java.lang.IllegalArgumentException: argument type mismatch.
Is there a way to pass this element to Java Callout without having to pass first a string and then convert to java.util.Date?

bad news
http://docs.oracle.com/cd/E13159_01/osb/docs10gr3/eclipsehelp/ui_ref.html#wp1290279
java.util.Date is not supported

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