[eclipselink-users] [MOXy] empty string

["polly.c.chang" <polly.c.chang@xxxxxxxxx>]

Hi,

I have a situation where we need to distinguish between empty tags vs.
missing tags.  The rules are:

For all String types:
* If the XML has <description></description>, that is supposed to mean empty
string ("").
* If the XML has no "description" tag, that is supposed to mean null.
* And vice versa for marshalling.

I looked at the javadoc and found that I might need to set a NullPolicy:
http://www.eclipse.org/eclipselink/api/1.1/org/eclipse/persistence/oxm/mappings/nullpolicy/NullPolicy.html

I am still confused after reading the documentation though.  How do I tell
EclipseLink that empty string means empty tags?  

Thanks!
--Polly
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