Java project to show Java/R interop

R/nb-configuration.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project-shared-configuration>
+    <!--
+This file contains additional configuration written by modules in the NetBeans IDE.
+The configuration is intended to be shared among all the users of project and
+therefore it is assumed to be part of version control checkout.
+Without this configuration present, some functionality in the IDE may be limited or fail altogether.
+-->
+    <properties xmlns="http://www.netbeans.org/ns/maven-properties-data/1">
+        <!--
+Properties that influence various parts of the IDE, especially code formatting and the like. 
+You can copy and paste the single properties, into the pom.xml file and the IDE will pick them up.
+That way multiple projects can share the same settings (useful for formatting rules for example).
+Any value defined here will override the pom.xml file value but is only applicable to the current project.
+-->
+        <netbeans.hint.jdkPlatform>GraalVM</netbeans.hint.jdkPlatform>
+    </properties>
+</project-shared-configuration>

R/nbactions.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<actions>
+        <action>
+            <actionName>debug</actionName>
+            <packagings>
+                <packaging>jar</packaging>
+            </packagings>
+            <goals>
+                <goal>process-classes</goal>
+                <goal>exec:exec</goal>
+            </goals>
+            <properties>
+                <debug>-J:-Xrunjdwp:transport=dt_socket,server=n,address=${jpda.address}</debug>
+                <jpda.listen>true</jpda.listen>
+            </properties>
+        </action>
+        <action>
+            <actionName>run</actionName>
+            <packagings>
+                <packaging>jar</packaging>
+            </packagings>
+            <goals>
+                <goal>process-classes</goal>
+                <goal>exec:exec</goal>
+            </goals>
+        </action>
+    </actions>

R/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.apidesign.demo</groupId>
+    <artifactId>sieve-r</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>Sieve with R in Java</name>
+    <dependencies>
+        <dependency>
+            <groupId>com.oracle.truffle</groupId>
+            <artifactId>truffle-api</artifactId>
+            <version>0.10</version>
+            <type>jar</type>
+        </dependency>
+    </dependencies>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.4.0</version>
+                <configuration>
+                    <executable>${java.home}/bin/graalvm</executable>
+                    <arguments>
+                        <arguments>${debug}</arguments>
+                        <argument>-cp</argument>
+                        <classpath/>
+                        <argument>org.apidesign.demo.sieve.r.Main</argument>
+                    </arguments>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

R/src/main/java/org/apidesign/demo/sieve/r/Main.java

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+package org.apidesign.demo.sieve.r;
+
+import com.oracle.truffle.api.source.Source;
+import com.oracle.truffle.api.vm.PolyglotEngine;
+import java.io.File;
+import java.net.URL;
+
+public final class Main {
+    private Main() {
+    }
+
+    public static void main(String[] args) throws Exception {
+        System.err.println("Setting up PolyglotEngine");
+        PolyglotEngine vm = PolyglotEngine.newBuilder().
+            build();
+
+        vm.eval(Source.fromText("", "warmup.R").withMimeType("text/x-r"));
+
+        URL url = Main.class.getProtectionDomain().getCodeSource().getLocation();
+        File local = new File(url.toURI());
+        for (;;) {
+            File sieveInR = new File(local, "sieve.R");
+            if (sieveInR.exists()) {
+                break;
+            }
+            local = local.getParentFile();
+        }
+        System.err.println("engine is ready");
+
+        Source r = Source.fromFileName(new File(local, "sieve.R").getPath());
+
+        vm.eval(r);
+    }
+}