[Rd] R package with Java source code

[Simon Urbanek]

On Apr 16, 2013, at 11:35 AM, Adrian Trapletti wrote:

> 
> On 04/16/2013 04:42 PM, Simon Urbanek wrote:
>> 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"?
> jars are often not under version control because of their redundancy and all the resulting problems.

Yes, you certainly don't want them under version control - you said yourself "ship" which is the built source tar ball, not your repository ;).


>> Your package won't work without them ...
> :-) yes, I know this (> 20 years of experience with Java, slightly less with R).
> 
>>> 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.
> 
> My question was not very precise. In fact I wanted to ask about Java source code compilation during the build step.
> 

Yes. Given that this is done under your control, there is not much support you need from R. The preferred setup is very individual (e.g. I avoid ant in my Java packages), so I don't think it's R's place to step in at that stage. I did consider adding some primitives, but given the individuality I just opted for conventions (like inst/java as a distribution place).

Cheers,
Simon


> Best regards
> Adrian
> 
> 
>> 
>> 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
>>> 
>>> ______________________________________________
>>> R-devel at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>> 
>>> 
> 
> -- 
> 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
> 
>