public  void beforeMarshal(Object source) 
{
        if (source instanceof Security) {
            Security security = (Security)source;
            if (security.getRoleMappings() != null && security.getRoleMappings().getRole().size() == 0) {
                security.setRoleMappings(null);
            } 
        } else if (source instanceof WebApp) {
            WebApp webapp = (WebApp)source;
            GbeanLocator gbeanlocator = webapp.getWebContainer();
            if (gbeanlocator != null && isEmpty(gbeanlocator.getGbeanLink()) && isEmpty(gbeanlocator.getPattern())) {
                webapp.setWebContainer(null);
            }
        } else if (source instanceof OpenejbJar) {
            OpenejbJar openejb = (OpenejbJar)source;
            ResourceLocator locator = openejb.getCmpConnectionFactory();
            if (locator != null && isEmpty(locator.getResourceLink()) && isEmpty(locator.getUrl()) && isEmpty(locator.getPattern())) {
                openejb.setCmpConnectionFactory(null);
            }
            Relationships relationships = openejb.getRelationships();
            if (relationships != null && relationships.getEjbRelation().size() == 0) {
                openejb.setRelationships(null);
            }
        } else if (source instanceof PersistenceContextRef) {
            PersistenceContextRef contextRef = (PersistenceContextRef)source;
            if (contextRef.getPattern() != null && isEmpty(contextRef.getPattern())) {
                contextRef.setPattern(null);
            }
        } else if (source instanceof EjbRelationshipRole) {
            EjbRelationshipRole role = (EjbRelationshipRole)source;
            if (role.getRoleMapping() != null && role.getRoleMapping().getCmrFieldMapping().size() == 0) {
                role.setRoleMapping(null);
            }
        }
}