gistfile1.txt

ValueType vt = pf.getValueType();
TicketProp prop = vt.newTicketProp();
prop.setValue(value);
queryString = "FROM " + prop.getClass().getName() + " ticketProp WHERE ticketProp.propField.name=:fieldName AND ticketProp.value" + condition + ":value";
query = em.createQuery(queryString);
query.setParameter("value", prop.getValue());