Olingo should support custom types e.g. Geometry by using XmlAdapter from JaxB

I am currently developing a software where I save GIS coordinates as part of my entities. I want to send these geometries as a string through OData to a client.

Technically I do the following:

OpenGis -> Hibernate Spatial -> JPA -> Olingo -> JavaScript -> OpenLayers

I already have an XmlAdapter that maps my Geometry to WKT. I want to use this as well for Olingo serialization

I copied the following file in my workspace and extended the convertToEdmSimpleType function:

org.apache.olingo.odata2.jpa.processor.core.access.model.JPATypeConvertor

 public static EdmSimpleTypeKind
      ...
    } else if(jpaType.equals(Geometry.class)) {
    	// "OData - JPA Type Converter: Type [class com.vividsolutions.jts.geom.Geometry] not supported"
    	return EdmSimpleTypeKind.String;
    }

    throw ODataJPAModelException.throwException(ODataJPAModelException.TYPE_NOT_SUPPORTED
        .addContent(jpaType.toString()), null);
  }

This is quick and dirty and it would be nice if there would be a cleaner solution to do so.