A system, method and program product for generating artifacts that can convert back and forth between non-EMF (Eclipse Modeling Framework) objects and EMF-based objects in an EMF-based runtime environment such as Web Data Objects (WDO) or Service Data Objects (SDO). Included is a system for inputting one or more non EMF application classes such as Java Beans and generating artifacts that include: a source meta model (ecore) that describes the data model defined by the input application classes; an EMap file that contains mappings between the classes and properties of the non-EMF objects and the EMF Objects; a target meta model (ecore) which represents the source meta model as transformed by the emap mappings; and a set of java classes (Mediators and DiffHandlers) that will at runtime perform the transformation between the two environments (non-EMF and EMF based objects).