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3 changes: 3 additions & 0 deletions python-java/README.md
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# FFI To Python From Java

Beginner friendly wrapper from Python to Java through [libpython-clj](https://github.com/clj-python/libpython-clj). Demonstrates a minimal project that imports custom Clojure code and interfaces with Python from Java.
97 changes: 97 additions & 0 deletions python-java/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>picklejar</groupId>
<artifactId>picklejar</artifactId>
<packaging>jar</packaging>
<version>0.1.0-SNAPSHOT</version>
<name>picklejar</name>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<description/>
<licenses>
<license>
<name>Eclipse Public License</name>
<url>http://www.eclipse.org/legal/epl-v10.html</url>
</license>
</licenses>
<scm/>
<build>
<sourceDirectory>src/java</sourceDirectory>
<resources>
<resource>
<directory>src/clj</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>test/clj</directory>
</testResource>
</testResources>
<directory>target</directory>
<outputDirectory>target/class-files</outputDirectory>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>picklejar.Main</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>central</id>
<url>https://repo1.maven.org/maven2/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</repository>
<repository>
<id>clojars</id>
<url>https://repo.clojars.org/</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</repository>
</repositories>
<dependencyManagement>
<dependencies/>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.clojure</groupId>
<artifactId>clojure</artifactId>
<version>1.10.2-alpha1</version>
</dependency>
<dependency>
<groupId>clj-python</groupId>
<artifactId>libpython-clj</artifactId>
<version>1.45</version>
</dependency>
</dependencies>
</project>
3 changes: 3 additions & 0 deletions python-java/src/clj/picklejar/core.clj
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(ns picklejar.core
(:require [libpython-clj.require :refer [require-python]]
[libpython-clj.python :refer [py. py.. py.-] :as py]))
17 changes: 17 additions & 0 deletions python-java/src/java/picklejar/Main.java
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package picklejar;
import clojure.java.api.Clojure;
import clojure.lang.IFn;

public class Main {
public static void main(String[] args) {
System.out.println("java main - enter");
IFn require = Clojure.var("clojure.core", "require");
// For using custom Clojure:
// require.invoke(Clojure.read("picklejar.core"));
require.invoke(Clojure.read("libpython-clj.require"));
require.invoke(Clojure.read("libpython-clj.python"));
IFn require_python = Clojure.var("libpython-clj.require", "require-python");
require_python.invoke(Clojure.read("numpy"));
System.out.println("java main - done");
}
}