> But these are precisely my points. Our code has to work with other
> free dbms (we use postgresql and mysql as well as firebird). While
> xa support is not available for them (nor available in several
> frameworks - turbine, melati, jrf for example) then we need
> different coding techniques to use xa when using firebird. That is

Sorry, but why cannot you use driver in old fashion? JCA stuff is
completely hidden from you when you instantiate driver using
DriverManager, isn't it? So, the only thing you need is JCA classes
in your classpath.

Roman