From mboxrd@z Thu Jan 1 00:00:00 1970 From: Torsten Wagner Subject: Re: How-to evaluate Java-snippets in org-mode/org-babel? Date: Thu, 14 Jul 2011 14:42:07 +0900 Message-ID: <4E1E81AF.4080609@gmail.com> References: <4E12B6DB.4090001@gmail.com> <87tyb1jdtk.fsf@pinto.chemeng.ucl.ac.uk> <4E145506.70802@gmail.com> <87box75xx6.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from eggs.gnu.org ([140.186.70.92]:34588) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QhEgf-0002QB-AG for emacs-orgmode@gnu.org; Thu, 14 Jul 2011 01:42:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QhEge-0003Zy-3i for emacs-orgmode@gnu.org; Thu, 14 Jul 2011 01:42:13 -0400 Received: from mail-iy0-f169.google.com ([209.85.210.169]:51477) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QhEgd-0003Zr-Ng for emacs-orgmode@gnu.org; Thu, 14 Jul 2011 01:42:12 -0400 Received: by iyl8 with SMTP id 8so7210620iyl.0 for ; Wed, 13 Jul 2011 22:42:10 -0700 (PDT) In-Reply-To: <87box75xx6.fsf@gmail.com> List-Id: "General discussions about Org-mode." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org Sender: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane.org@gnu.org To: Eric Schulte Cc: Org Mode Mailing List Hi Eric, > You probably don't want to pass the body of a code block to a lisp > function as quoting will become a nightmare, however passing the name to > a lisp block may be reasonable. > > I would suggest that rather than implementing this behavior in a code > block you take a look at starting a ob-java.el file. A partial > implementation (e.g., only external evaluation, no session evaluation) > would be a useful contribution, and given the many helper functions and > examples present in the other ob-* files this would most likely be > easier than a custom lisp-block implementation. o.k. the first round of evaluations is over and it worked out o.k. However, there was still rather much handwork to do. I tried to get a ob-java.el file together using the template and mainly by looking at ob-c.el which I guess comes close what would have to be done for java. However, my lisp-skills (which are close to zero) are not enough to get it working. The main problem was that ob-c.el is working for both C and C++ and all this if then else troubles me a bit. Basically, I want only tangle the actual code block into a temp file. Well temp is not really right, since java demand its file structure and file naming. Finally execute it externally by your proposed code javac -cp . mypackage/myclass.java java -cp . mypackage.myclass and return the results Hmm maybe better to give a real world example (stripped down to make it shorter) I use now the following way /-----------------------------------------------/ #+BABEL: :mkdirp t * Coursework 1 ** StudentID1 #+BEGIN_SRC java package foo; public class Bar { private double ans = 0 public void set(double d){ ans = d; } public void print(){ System.out.println(ans); } public static void main(String[] argv){ Bar c = new Bar(); c.set(100); c.print(); } } #+end_src ** StudentID2 #+BEGIN_SRC java package foo; public class Bar { private double x = 0 public void set(double in){ x = in; } public void print(){ System.out.println(x); } public static void main(String[] argv){ Bar myclass = new Bar(); myclass.set(100); myclass.print(); } } #+end_src ** Result #+srcname: result #+begin_src sh :results output javac -cp . foo/Bar.java java -cp . foo.Bar #+end_src /----------------------------------------------------/ For now I only added the tangle command to a single code block and created the file via C-c C-v t. #+BEGIN_SRC java tangle: foo/Bar.java Then I rushed down to a shell block "result" which executed the the above commands. I checked the results and started to remove the tangle object from one block and added it to the next block. Kind of tiring if you have several dozen of blocks. Guess you can see from the above example the trouble of having several dozen of them and then tangeling them one by one and execute the result block ;) I tried to make it more easy by giving the shell block a name and call it under each java code block. This would save me the time going up and down in my file. #+call: result() However, I noticed that the result update was always done at the first appearances of the call , like under the first java code block but not at the desired code block?! if you fold all together it would look like /-----------------------------------------------/ #+BABEL: :mkdirp t * Coursework 1 ** StudentID1 #+BEGIN_SRC java #+call: result() #+results: result : 100.0 ** StudentID2 #+BEGIN_SRC java :tangle foo/Bar.java #+call: result() ** Result #+srcname: result /-----------------------------------------------/ Calling the second call function updates the result on the first! Anyhow, I guess having it working with a ob-java.el minimal system would be the most easiest. Simply type C-c C-c and it would be done. Would be very glad if you could help me to get this somehow working. Totti