public QueryExpressions eval(Object parsed,
    ExpressionStoreQuery query,
    ExpressionFactory factory,
    ClassMetaData candidate) 
{
        try {
            return new JPQLExpressionBuilder(factory, query, parsed).
                getQueryExpressions();
        } catch (OpenJPAException ke) {
            throw ke;
        } catch (Exception e) {
            throw new UserException(_loc.get("bad-jpql", parsed), e);
        }
}

 public Value[] eval(String[] vals,
    ExpressionStoreQuery query,
    ExpressionFactory factory,
    ClassMetaData candidate) 
{
        return null;
}

 public String getLanguage() 
{
        return JPQLParser.LANG_JPQL;
}

 public Object parse(String ql,
    ExpressionStoreQuery query) 
{
          
        if (query.getContext().getParameterDeclaration() != null)
            throw new UserException(_loc.get("param-decs-invalid"));
        return new JPQLExpressionBuilder.ParsedJPQL(ql);
}

 public  void populate(Object parsed,
    ExpressionStoreQuery query) 
{
        if (!(parsed instanceof JPQLExpressionBuilder.ParsedJPQL))
            throw new ClassCastException(parsed == null ? null + ""
                : parsed.getClass().getName());
        ((JPQLExpressionBuilder.ParsedJPQL) parsed).populate(query);
}