Java EE (Java Enterprise Edition) General Discussion

HI,

I am using JAXB to unmarshal and marshal XML defined by a XML schema (elementFormDefault qualified).
The unmarshalling is fine and works as expected, but the generated XML when marshalling back is not valid and produces error messages when I try to unmarshal it again.

I think the problem is with the namespaces. The produced XML does not have a default namespace only the schema namespace associated to a prefix. All elements are prefixed with this prefix except the root element, which results in failing the validation.

I can not persuade JAXB to use the schema NS as default namespace as I want to. I tried using a custom NamespacePrefixMapper, which returns "" for the schema NS. Unfortunately this is ignored, even though the generated XML does still not have a default NS declaration (xmlns="... is missing altogether).
I noticed that my custom prefix mapper is used, but in addition to the schema NS also a empty NS ("") is processed. I tried to set a prefix to that empty NS, but it did not work. I am guessing since the empty NS is processed after the schema NS and also requests to be the default, that this somehow prevents the schema NS to be the default.

If I specify a non empty prefix value (like "nsx") for the schema NS, it is going to be used for all elements except the root and I am back the initial problem. Besides, I would really like the generated XML to be without unnecessary prefixes.

I don't know what I am missing.

Any help very much appreciated!

Many thanks,
Flo