Download the toplink-spatial-template.jar (to support Oracle Spatial) Launch the Config Wizard (/common/bin/config.sh (or .cmd). Weblogic Extend Domain Configuration Summary Toplink Spatial Template
Preparing...
Extracting Domain Extension Contents...
Saving the Domain Information...
Updating Domain Information...
String Substituting Domain Files...
Performing OS Specific Tasks...
Performing Post Domain Creation Tasks...
Domain Extension Applied Successfully!

Domain Location: /bishiphome/Middleware/user_projects/domains/bifoundation_domain
Admin Server URL: http://demo.us.oracle.com:7001

Annotation Example
@Entity
@Table(name="myName")
@StructConverter(name = "JGeometry", converter = 
"org.eclipse.persistence.platform.database.oracle.converters.JGeometryConverter")
public class Hotstar implements Serializable {
	private static final long serialVersionUID = 1L;
	
	@Convert(value="JGeometry")
	private JGeometry point;
	
	@Convert(value="JGeometry")
	@Column(name="POINT_90112")
	private JGeometry point90112;

....
Support
java.lang.NoClassDefFoundError: oracle/spatial/geometry/JGeometry
Exception in thread "main" javax.ejb.EJBException: EJB Exception: ; 
nested exception is: java.lang.NoClassDefFoundError: oracle/spatial/geometry/JGeometry; 
nested exception is: java.rmi.RemoteException: EJB Exception: ; 
nested exception is: java.lang.NoClassDefFoundError: oracle/spatial/geometry/JGeometry

You must complete the configuration of your application server.
Documentation / Reference