JAXB: Isn't it possible to use an XmlAdapter without @XmlJavaTypeAdapter?

Question

Can\'t I register a bunch of XmlAdapters to Marshaller|Unmarshaller so that I wouldn\'t need to specify @XmlJavaTypeAdapter

Answer 1

You can use the package-info.java

That's called "package level".

Example : put a package-info.java in the same package that the class you want to marshall/unmarshall.

Suppose you have a class mypackage.model.A and an adapter CalendarAdapter in mypackage.adapter. Declare a package-info.java file in mypackage.model containing :

@XmlJavaTypeAdapters({
    @XmlJavaTypeAdapter(value = CalendarAdapter.class, type = Calendar.class)
})
package mypackage.model;

import java.util.Calendar;
import mypackage.adapter.CalendarAdapter;

All field of type Calendar in the class A will be marshalled or unmarshalled with the CalendarAdapter.

You can find useful informations there : http://blog.bdoughan.com/2012/02/jaxb-and-package-level-xmladapters.html