RE: [Help-glpk] Which is the closer-to-be-officially-endorsed Java (jni) GLPK interface?

[Nigel Galloway]

Little burden is added to the Java side solving the constraint (I promise I'll 
never misspell that again) matrix. Usually setting up the constraint matrix 
will be a small percentage of the time spent solving it. Therefore a little 
overhead setting up the constrain (I lied) matrix will not be noticed.


> ----- Original Message -----
> From: "Giampaolo Tomassoni" <address@hidden>
> To: address@hidden
> Subject: RE: [Help-glpk] Which is the closer-to-be-officially-endorsed        
> Java    (jni) GLPK interface?
> Date: Thu, 5 Nov 2009 11:59:04 +0100
> 
> 
> > Hello Giampaolo,
> >
> > https://gnu-glpk.dev.java.net/
> > is not providing a JNI interface for GLPK but allows to run GLPK on the
> > Sun Grid Computing Utility.
> >
> > The JNI interface for GLPK published at
> > http://bjoern.dapnet.de/glpk/
> > has not been updated since version 4.8 of GLPK.
> >
> > There has been a discussion to include the necessary files to build a
> > JNI
> > interface
> > into GLPK:
> > http://lists.gnu.org/archive/html/help-glpk/2009-01/msg00068.html
> > http://lists.gnu.org/archive/html/help-glpk/2009-02/msg00001.html
> >
> > Andrew Makhorin the maintainer of GLPK decided not to include this
> > feature
> > into
> > his distribution.
> >
> > Hence I set up the glpk-java project at sourceforge
> > http://sourceforge.net/projects/glpk-java/
> > and kept it in synch with the development of GLPK.
> 
> This is what I was looking for: a project tightly coupled with GNU GLPK.
> 
> 
> > glpk-java is using SWIG to create the JNI wrapper classes. Therefore it
> > is
> > easy to upgrade to any future version of GLPK.
> > (SWIG is hosted at http://www.swig.org .)
> 
> Right. I see, however, that swig tends to add some burden in the Java side.
> In example, I see that constants from glpk.h are converted into methods. Am
> I right or it is just I don't know almost anything about swig?
> 
> 
> > Makefiles for Windows 32bit and 64bit and for POSIX (Linux, ...) are
> > supplied.
> >
> > Binaries for Windows are published at
> > http://sourceforge.net/projects/winglpk/.
> >
> > A package for Debian Sid has been set up
> > http://packages.debian.org/unstable/java/libglpk-java
> 
> Xypron, may I ask why there is a specific project for the win binaries? And
> why the Debian package shows autoconf/automake capabilities which are
> missing in the glpk-java project? Can't they be back-ported?
> 
> 
> > glpk-java currently currently does not support callback routines. I
> > would
> > welcome contributions to add this feature.
> 
> Ah, you see the GlpkHookIFC interface in the stan's glpk-jni subproject,
> isn't it?
> 
> I may attempt to port something like that in the glpk-java project, provided
> I get enough knowledge about swing.
> 
> 
> > Best regards
> >
> > Xypron
> 
> Thank you very much for your reply,
> 
> Giampaolo
> 
> 
> 
> _______________________________________________
> Help-glpk mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-glpk

>


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