Or, maybe you can intern() the String(s) that you created you can probably find the problem. Maybe.
SDG jco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, October 10, 2003 7:57 PM To: [EMAIL PROTECTED] Subject: Re: JESS: Retractions through Rete object trouble! Well, the thing to do ies to get an instance of both an apparently good and bad Java string together, and compare them one character at a time, like String good = ... String bad = ... for (int i=0; i<good.length(); ++i) if (good.charAt(i) != bad.charAt(i)) System.out.println("DIFF: " + (int) good.charAt(i) + " " + (int) bad.charAt(i)); and see if you can figure out the mismatch that way. I think Jordan Willms wrote: > Hi there. > > I am communicating with the Jess engine using Java, and I've > noticed some altogether strange behaviour with Fact retractions (which > I have no doubt is my fault). I come to the mailing list as a last > resort. > > I am quite experienced with Jess/Java integration, which is why this > problem > > is very confusing to me. > > Firstly, take the following retraction string, I run it in WinJess > with no problems : > > (retract-string " > (PropertyValue > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#hasDirectionality > > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#AShok > > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#DirectionalityPointSourc e) > ") > > But, the same string, generated from a rdf file : > <?xml version="1.0" encoding="ISO-8859-1"?> > <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"; > xmlns:daml="http://www.daml.org/2001/03/daml+oil#"; > xmlns:ns1="http://echo.iat.sfu.ca/owl/psychoacoustics.daml#"; > xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"; > xmlns:xsd="http://www.w3.org/2000/10/XMLSchema#";> > <rdf:Description > rdf:about="http://echo.iat.sfu.ca/owl/psychoacoustics.daml#AShok";> > <ns1:hasDirectionality > </rdf:Description> > </rdf:RDF> > > which looks exactly the same (here is my debug) window (does not > work?): > > [echoEdit] Retract String: (retract-string " > (PropertyValue > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#hasDirectionality > > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#AShok > > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#DirectionalityPointSourc e) > ") > > when I do : > > Value v = rete.executeCommand(retractString); // retractString is the > above > > string > > System.out.println(v.toString()); > > prints FALSE! > > PART 3 : The real wierdness : > > I put together the following code: > > Rete rete = myThread.getJessEngine(); > Value v = rete.executeCommand("(retract-string > \"(PropertyValue > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#hasDirectionality > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#AShok > > System.out.println("value v : " + v.toString()); > // Prints out TRUE! > > So, obviously something is wrong with the fact string that I am trying > to create from the RDF file. BUT -- IT'S EXACTLY THE SAME! So, why is > this happening? > > Can anyone shed any light on this problem. I feel like I'm taking > crazy pills. > > Thank you very much. > > ..Jordan Willms. > rdf:resource="http://echo.iat.sfu.ca/owl/psychoacoustics.daml#Directio > nality > > PointSource" /> > http://echo.iat.sfu.ca/owl/psychoacoustics.daml#DirectionalityPointSou > rce)\" > > )"); > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users > [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT > to the list (use your own address!) List problems? Notify > [EMAIL PROTECTED] > -------------------------------------------------------------------- > --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] -------------------------------------------------------------------- -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
