Serialize annotation property values which are references as objects

[ledsoft]

As a user, I want JB4JSON-LD to serialize annotation property values as objects in case they represent individual references.

That is, if the annotation property value is a URI/URL, it should be serialized as an object with a single attribute - @id.

[ledsoft]

Example:

class A {

@OWLAnnotationProperty(iri = "http://example.org/annotation")
private Object annotation;
}

A a = new A();
a.annotation = URI.create("http://example.org");

Should be serialized as (ID omitted):

{
    "http://example.org/annotation": {
        "@id": "http://example.org"
    }
}

[ledsoft]

Implemented in 0.5.0.