Transforming JSX with nashorn

JSXTransform

import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

import jdk.nashorn.api.scripting.JSObject;
import jdk.nashorn.api.scripting.ScriptObjectMirror;

public class Test {
    public static void main(String... args) throws Exception {
        ScriptEngineManager mgr = new ScriptEngineManager();
        ScriptEngine nashorn = mgr.getEngineByName("nashorn");
        nashorn.eval("var process = {env:{}}"); // node-modules expect that
        nashorn.eval("var global = this;"); // react expects that
        nashorn.eval(getScript("jvm-npm.js"));
        nashorn.eval(getScript("react.js"));
        nashorn.eval(getScript("JSXTransformer.js"));
        JSObject jsxTransformer = (JSObject) nashorn.eval("JSXTransformer");
        Invocable invocable = (Invocable) nashorn;
        String componentName = "Component";
        ScriptObjectMirror jsxMirror = (ScriptObjectMirror) invocable.invokeMethod(jsxTransformer, "transform", getCodeFromFile(componentName + ".jsx"));
        String code = (String) jsxMirror.getMember("code");
        writeScriptToPath(code, componentName + ".js");

        // System.out.println(nashorn.eval("React.renderToString(React.createFactory(require('Component'))());"));
    }

    private static Reader getScript(String name) {
        return new InputStreamReader(Test.class.getClassLoader().getResourceAsStream(name));
    }

    private static String getCodeFromFile(String name) throws Exception {
        return new String(Files.readAllBytes(getPath(name)));

    }

    private static Path getPath(String name) throws Exception {
        return Paths.get(ClassLoader.getSystemResource(name).toURI());
    }

    private static void writeScriptToPath(String content, String path) throws Exception {
        Files.write(Paths.get(path), content.getBytes());
    }

}