Question

I have an xsd provided by a client I can’t change. I’m using jaxb to generate the classes. The resulting class has an annotation like:

@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar expires;

I try to turn this into json using GSON and I get a classnotfoundexception for javax.xml.bind.XmlSchemaType. I add the dependency for javax.xml.bind in maven pom.xml:

<dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>javax.xml.bind</artifactId>
    <version>3.0-b54</version>
    <scope>compile</scope>
</dependency>

Then I get this crazy error:

Attempt to include a core class (java.* or javax.*) in something other
than a core library. It is likely that you have attempted to include
in an application the core library (or a part thereof) from a desktop
virtual machine. This will most assuredly not work. At a minimum, it
jeopardizes the compatibility of your app with future versions of the
platform. It is also often of questionable legality.

If you really intend to build a core library — which is only
appropriate as part of creating a full virtual machine distribution,
as opposed to compiling an application — then use the
“–core-library” option to suppress this error message.

If you go ahead and use “–core-library” but are in fact building an
application, then be forewarned that your application will still fail
to build or run, at some point. Please be prepared for angry customers
who find, for example, that your application ceases to function once
they upgrade their operating system. You will be to blame for this
problem.

If you are legitimately using some code that happens to be in a core
package, then the easiest safe alternative you have is to repackage
that code. That is, move the classes in question into your own package
namespace. This means that they will never be in conflict with core
system classes. If you find that you cannot do this, then that is an
indication that the path you are on will ultimately lead to pain,
suffering, grief, and lamentation.

!!!

I either need to skip the annotation, tell jaxb not to generate themor gson to ignore them or import the dependency correctly.

Answer 1

<scope>provided</scope>

fixed me up – i wasn’t aware that everything under javax.* is provided by android.