[SOLVED] Load .RData from an R script in Scala using Renjin

Load .RData from an R script in Scala using Renjin

I have an R script load.R that attempts to do

load("test.RData")

When I run:

engine.eval(new FileReader("load.R"))

An exception occurs:

   Exception in thread "main" java.lang.NoClassDefFoundError: org/tukaani/xz/XZInputStream
    at org.renjin.primitives.io.connections.Connections.gzfile(Connections.java:79)
    at org.renjin.primitives.R$primitive$gzfile.doApply(R$primitive$gzfile.java:75)
    at org.renjin.primitives.R$primitive$gzfile.apply(R$primitive$gzfile.java:36)
    at org.renjin.primitives.special.InternalFunction.apply(InternalFunction.java:45)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.eval.Context.evaluate(Context.java:163)
    at org.renjin.sexp.Closure.doApply(Closure.java:83)
    at org.renjin.eval.ClosureDispatcher.apply(ClosureDispatcher.java:73)
    at org.renjin.eval.ClosureDispatcher.applyClosure(ClosureDispatcher.java:58)
    at org.renjin.sexp.Closure.apply(Closure.java:78)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.primitives.special.AssignLeftFunction.assignLeft(AssignLeftFunction.java:57)
    at org.renjin.primitives.special.AssignLeftFunction.apply(AssignLeftFunction.java:41)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.primitives.special.BeginFunction.apply(BeginFunction.java:38)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.primitives.special.IfFunction.apply(IfFunction.java:40)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.primitives.special.BeginFunction.apply(BeginFunction.java:38)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.eval.Context.evaluate(Context.java:163)
    at org.renjin.sexp.Closure.doApply(Closure.java:83)
    at org.renjin.eval.ClosureDispatcher.apply(ClosureDispatcher.java:73)
    at org.renjin.eval.ClosureDispatcher.applyClosure(ClosureDispatcher.java:58)
    at org.renjin.sexp.Closure.apply(Closure.java:78)
    at org.renjin.eval.Context.evaluateCall(Context.java:302)
    at org.renjin.eval.Context.evaluate(Context.java:222)
    at org.renjin.eval.Context.evaluateExpressionVector(Context.java:285)
    at org.renjin.eval.Context.evaluate(Context.java:220)
    at org.renjin.script.RenjinScriptEngine.eval(RenjinScriptEngine.java:145)
    at org.renjin.script.RenjinScriptEngine.eval(RenjinScriptEngine.java:104)
    at com.infosistema.imp.restservice.data_treatment.DataTreatment.<init>(DataTreatment.scala:34)
    at com.infosistema.imp.restservice.data_treatment.Main$.<init>(DataTreatment.scala:45)
    at com.infosistema.imp.restservice.data_treatment.Main$.<clinit>(DataTreatment.scala)
    at com.infosistema.imp.restservice.data_treatment.Main.main(DataTreatment.scala)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: org.tukaani.xz.XZInputStream
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 46 more

I don't know R. I'm merely attempting to use R code to process some data in a Java/Scala application using Renjin.

Reading the data section on the documention nothing is said about loading data from .RData files.

UPDATED: In my build.sbt file I have:

resolvers += "BeDataDriven" at https://nexus.bedatadriven.com/content/groups/public",
libraryDependencies += "org.renjin" % "renjin-script-engine" % "0.8.1886"

Solution

The problem was coursier not being able to resolve all dependencies (without any notice).

Removing addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0-M15") from plugins.sbt and using sbt's default resolver fixed the issue.