From simon.urbanek at r-project.org  Tue Apr 16 16:42:41 2013
From: simon.urbanek at r-project.org (Simon Urbanek)
Date: Tue, 16 Apr 2013 10:42:41 -0400
Subject: [Rd] R package with Java source code
In-Reply-To: <516D58A8.1000000@trapletti.org>
References: <516D33F7.9070606@trapletti.org> <516D39B4.5080100@stats.ox.ac.uk>
	<516D58A8.1000000@trapletti.org>
Message-ID: <5157CBF3-2CEA-45B9-B63D-77CC841559DC@r-project.org>

On Apr 16, 2013, at 9:56 AM, Adrian Trapletti wrote:

> I don't really like the approach which ship the redundant jar files unless it is a "precompiled binary" distribution of a package.
> 

What do you mean by "redundant"? Your package won't work without them ...


> In the meantime I found the following suggestion http://romainfrancois.blog.free.fr/index.php?post/2009/03/26/Hello-Java-World which is close to what I was thinking of.
> 

Well, that's in essence what has been suggested. The point is that *you* have to run build before you publish the package to create the jar file, it can't be done at install time for reasons explained.

Cheers,
Simon


> Anyhow thanks for the comments.
> 
> Best regards
> Adrian
> 
> On 04/16/2013 01:44 PM, Prof Brian Ripley wrote:
>> On 16/04/2013 12:20, Adrian Trapletti wrote:
>>> Dear All,
>>> 
>>> Are there any plans around that "R CMD INSTALL
>>> some_package_containing_java_source code" supports Java source code
>>> compiling in future versions of R similar to compiling C/C++ and/or
>>> Fortran sources in the src directory?
>>> 
>>> Best regards
>>> Adrian
>>> 
>> 
>> No.  A Java 'compiler' is not required, but if one is available is it is set in etc/Makeconf as JAVAC.
>> 
>> There are many packages which ship jar files with 'compiled' Java code, and others with .class files.  It is hard to see a case for compiling at install time rather than when preparing the package. But it would be easy to write a suitable rule in src/Makevars.
>> 
>> Note that most systems will not have a JDK, only a JRE.  That includes Windows systems, but winbuilder should be able to prepare a binary package (it needs a JDK to install rJava, JavaJD ...).
>> 
>> One needs to be slightly careful with Java version requirements. AFAIR OS X Leopard systems only had 1.5 (at least for one of the architectures) and R 2.15.x still supported Leopard (and packages are still being built for it).  Systems with Java 1.6 aka 6 are still in widespread use, even if it past end-of-life according to Oracle.
>> 
> 
> -- 
> Dr. Adrian Trapletti
> Steinstrasse 9b
> CH-8610 Uster
> Switzerland
> 
> Phone : +41 (0) 44 9945630
> Mobile : +41 (0) 79 1037131
> 
> Email : adrian at trapletti.org
> WWW : www.trapletti.org
> 
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> 



[Rd] R package with Java source code
Simon Urbanek