Has someone ever been able to remove unused namespaces during marshal of an object using JAXB? Here is a link of the requested feature: https://github.com/javaee/jaxb-v2/issues/103 (see description)
Is there a property for configuring JAXB for this? Has this been fixed in MOXy?
I am currently traversing the object that needs to be marshalled and extract all classes that need to be bound into Class[] classesToBeBound.
Then I create a new JAXBContext.newInstance(classesToBeBound)
The unused namespaces now are not included in the XML.
I know that xml validation is valid even with the unused namespaces but to me this is something a framework should handle.
The following link https://blogs.oracle.com/enterprisetechtips/entry/customizing_jaxb mentions various fixed (see middle of the text somewhere) but when trying to find the solution in those links either the link is broken or no-one really solved it.
Any comments are welcome.
(EDIT) Plain text:
GIVEN
a new instance of JAXBContext and add 2 classes with each a separate namespace.
WHEN
marshalling a class that has these 2 classes as a property but only 1 of them is not null
THEN
I expect only the namespace of the property that is not null to be visible in the XML.
BUT the ACTUAL is
that both namespaces are in the xml.
So my question was how can I remove or tell JAXB to NOT write the unused namespaces?
To put it in java-code: GIVEN
public class Foo{
private Bar bar; //namespace something2
private User user; //namespace user
}
WHEN
JAXBContext c = JAXBContext.newInstance(Foo.class, Bar.class, User.class);
...
Foo foo = new Foo();
foo.setBar(null);
foo.setUser(new User("Bob"));
marshaller.umarshal(foo);
THEN I expect the xml to be
<foo xmlns="something1" xmlns:user="user">
<user:name>Bob</user:name>
</foo>
BUT the ACTUAL is (note the something2 namespace)
<foo xmlns="something1" xmlns:user="user" xmlns:bar="something2">
<user:name>Bob</user:name>
</foo>
Of course this is a simplified example and our specification of a type has around 30 different namespaces.