Thanks a lot - Re: Why I always get "null" returned when calling functions?
Francisco <jshzhang2000-/[email protected]> Tue, 27 Feb 2007 13:09:28 +0000 (GMT)
| Newsgroups | gmane.text.xml.o-xml |
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| Message-ID | <[email protected]> |
--===============0918482990== Content-Type: multipart/alternative; boundary="0-800916381-1172581768=:83459" Content-Transfer-Encoding: 7bit --0-800916381-1172581768=:83459 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Dear Martin, =20 Your immediate help is highly appreciated here, many thanks for the wor= king example and all links. I believe there should be running smoothly th= is time. I will keep you informed when the overall system runs well. =20 Have a great day! =20 Kind regards, Francisco Martin Klang <[email protected]> wrote: Francisco, You need to match the function name and signature, in the same way as=20 when you call Class.getMethod(String, Class[]) in Java. For example, if your function definition looks like this: ie you've defined the function 'plus(Number, Number)', then you can=20 look up the function like this: Function func =3D program.getResolver().getFunction(new Name("plus"),=20 new Type[]{NumberNode.TYPE, NumberNode.TYPE}); I have put together a couple of working examples that you can=20 download from here: http://mars.pingdynasty.com/CallObjectboxExamples.zip You need to have the latest objectbox.jar on your classpath to=20 compile and run the Java program. best of luck, I look forward to hearing of your success! /m On 26 Feb 2007, at 16:16, Francisco wrote: > Dear Martin, > > Sorry to bother you again. I have the difficulty in following your=20 > example to call the functions. The problem is mainly on this line=20 > ----- > > Function func =3D program.getResolver().getFunction=20 > (functionName,signature); > > I always get "null" as return, I don't know how to solve it. I=20 > checked the API but couldn't find more details on how to pass the=20 > arguments or signatures for designated functions? I tried to put=20 > signatures inside. But still not succeed. Could you please kindly=20 > give a further explaination on this? Thank you very much for your=20 > help. > > Looking forward to your email. > > Kind regards, > Francisco > =09 --------------------------------- New Yahoo! Mail is the ultimate force in competitive emailing. Find out = more at the Yahoo! Mail Championships. Plus: play games and win prizes. --0-800916381-1172581768=:83459 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable <div>Dear Martin,</div> <div> </div> <div>Your immediate help is h= ighly appreciated here, many thanks for the working example and all = links. I believe there should be running smoothly this time. I will keep = you informed when the overall system runs well.</div> <div> </= div> <div>Have a great day!</div> <div> </div> <div>Kind regards,= </div> <div>Francisco<BR><BR><B><I>Martin Klang <[email protected]>= </I></B> wrote:</div> <BLOCKQUOTE class=3Dreplbq style=3D"PADDING-LEFT: = 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Francisco,<BR><BR>= You need to match the function name and signature, in the same way as <BR= >when you call Class.getMethod(String, Class[]) in Java.<BR><BR>For examp= le, if your function definition looks like this:<BR><?xml:namespace prefi= x =3D o /><o:function name=3D"plus"><BR><o:param type=3D"Node" name=3D"lh= s"></o:param><BR><o:param type=3D"Node" name=3D"rhs"></o:param><BR><o:do>= <BR><o:return select=3D"$lhs + $rhs"></o:return><BR></o:do><BR></o:function><BR><BR>ie you've defined t= he function 'plus(Number, Number)', then you can <BR>look up the function= like this:<BR><BR>Function func =3D program.getResolver().getFunction(ne= w Name("plus"), <BR>new Type[]{NumberNode.TYPE, NumberNode.TYPE});<BR><BR= >I have put together a couple of working examples that you can <BR>downlo= ad from here:<BR>http://mars.pingdynasty.com/CallObjectboxExamples.zip<BR= ><BR>You need to have the latest objectbox.jar on your classpath to <BR>c= ompile and run the Java program.<BR><BR>best of luck, I look forward to h= earing of your success!<BR><BR>/m<BR><BR><BR>On 26 Feb 2007, at 16:16, Fr= ancisco wrote:<BR><BR>> Dear Martin,<BR>><BR>> Sorry to bother y= ou again. I have the difficulty in following your <BR>> example to cal= l the functions. The problem is mainly on this line <BR>> -----<BR>>= ;<BR>> Function func =3D program.getResolver().getFunction <BR>> (f= unctionName,signature);<BR>><BR>> I always get "null" as return, I don't know how to solve it. I <BR>> ch= ecked the API but couldn't find more details on how to pass the <BR>> = arguments or signatures for designated functions? I tried to put <BR>>= signatures inside. But still not succeed. Could you please kindly <BR>&g= t; give a further explaination on this? Thank you very much for your <BR>= > help.<BR>><BR>> Looking forward to your email.<BR>><BR>>= Kind regards,<BR>> Francisco<BR>><BR></BLOCKQUOTE><BR><p>  <hr size=3D1>=20 New Yahoo! Mail is the ultimate force in competitive emailing. Find out m= ore at the <a href=3D"http://uk.rd.yahoo.com/mail/uk/taglines/yahoo_co_uk= /championships/games/*http://uk.rd.yahoo.com/evt=3D44106/*http://mail.yah= oo.net/uk/">Yahoo! Mail Championships</a>. Plus: play games and win prize= s. --0-800916381-1172581768=:83459-- --===============0918482990== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ o-xml mailing list o-xml-zRfLyl9bSvv/[email protected] http://lists.pingdynasty.com/mailman/listinfo/o-xml --===============0918482990==--