Unmarshal "null" to "no tag" instead of empty tag

[drankfrabbin]

Currently Pirity marshals "null" to empty tags:

String foo = null;

becomes

<foo\>

Unmarshalling that back to a java object with JaxB will cause "foo" to be an empty string, rather than null.

Would it be possible to add the ability to omit the tag when marshalling "null"s?

[gallafent]

I would also like to see an option for the serialiser to serialise a null element as “absent” rather than the current “empty”. I need this in order to drive a third party API which expects some optional elements to be either present and set to a valid value, or completely absent; present but empty is not an acceptable input to that API!