Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Thu, 01 Apr 2010 09:36:09 -0500

On 4/1/10 6:58 AM, rolf wrote:
> I am trying to work with Java Channel access (JCA 2.3.2  and CAJ
> 1.1.5b). I may have blinders on, but the only documentation I can find
> is the APS tutorial and the JCA javadoc (for JCA 2.1.2). If there is
> anything else, could someone please point me to it.
> 
> My specific problem:
> I have a MonitorListener, which delivers a MonitorEvent on a PV value
> change.
> The MonitorEvent gives me DBR, from which I want to get the new value as
> a String.
> 
> My code looks like this:
> 
> DBR dbr = evt.getDBR();
> DBR dbr2 = dbr.convert(DBRType.CTRL_STRING);
> String[] s = ((DBRString) dbr2).getStringValue();
> 
> s[0] contains the correct value for all DBR types, with the exception of
> enumerated types, where it has an empty string.
> What am I doing wrong?

Hi, Rolf.

I've never done what you're trying to do, but have you seen the
following Tech-Talk post?

  http://www.aps.anl.gov/epics/tech-talk/2006/msg01221.php

Perhaps you need to use DBRType.LABELS_ENUM?

Lewis

-- 
J. Lewis Muir
Software Engineer
IMCA-CAT

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System