[Rd] Canonical package directory name for JAR files?

William Dunlap wdunlap at tibco.com
Wed Feb 8 21:27:25 CET 2012

For what it is worth, the S+ package system uses
the java directory in source packages to store
java source code (under pkg/java/src/, using the usual
directory structure that follows the class structure
under there), prebuilt jar files (in pkg/java/prebuiltjars,
no subdirectories), and a Makevars file (pkg/java/Makevars)
that can define the java compiler flags PKG_JAVAC_CLASSPATH
  PKG_JAVACFLAGS=-verbose -g

INSTALL compiles the java code in pkg/java/src and puts
it into into a jar file called pkg/jars/pkg.jar.  All of
the jar files in pkg/java/prebuiltjars are copied into
pkg/jars as well.  The installed package has a jars directory
but no java directory (i.e., {java,jars} <=> {src,libs}).

library(pkg) adds pkg/jars to the CLASSPATH so .Java calls
will find it.

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com 

> -----Original Message-----
> From: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-project.org] On Behalf Of Roebuck,Paul L
> Sent: Wednesday, February 08, 2012 8:14 AM
> To: Simon Urbanek
> Cc: R-Devel
> Subject: Re: [Rd] Canonical package directory name for JAR files?
> On 2/7/12 5:37 PM, "Simon Urbanek" <simon.urbanek at r-project.org> wrote:
> > On Feb 7, 2012, at 4:34 PM, Roebuck,Paul L wrote:
> >
> >> We have an R package which needs to include a JAR file.
> >> Is there a canonical directory for it?
> >
> > rJava defines "java" for that purpose (see ?.jpackage).
> > How canonical that is may be open for debate ;)
> Yeah, when I wrote Java stuff, that was the Java source code
> root directory. Yet, 'lib' (which was the directory where JAR
> files lived in Java projects) seems inappropriate for non-Java
> projects.
> But 'java' appears to be the de-facto standard for R packages,
> so...
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