Milliseconds out of a java.util.Date that thinks it is a freemarker.template.SimpleDate

Hi there,

I got a set of pretty simple macros for printing out dates. One for giving only
the day, one for the time, one for timezone. These all work fine, using the
built-in features like ?string("dddd-mm-yy").

Now I try (for debugging purposes) to write one that gives me the milliseconds
since 1970 (which is not covered by built-in functions).

For a java.util.Date, this is simple, right?

wrapper.getMyDate.getTime()

So I tried a naive approach in Freemarker:

wrapper.myDate.time

Sadly, this makes the system cry out:
Expected hash. wrapper.myDate evaluated instead to
freemarker.template.SimpleDate


I wonder why that is happening.
My assumption, though I did not find anything in the docs about it: There are
obviously classes that get treated differently by FreeMarker. Some are just
wrapped, but others get special features. java.util.Date is wrapped into
freemarker.template.SimpleDate. The latter misses the former's getTime() method.
Right?
If so: How can I prevent this from happening?
If not: How else does it work, what do I need to do?
 
Thanks in advance,
Tobias

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