ClassPath antClasspath = classPathRegistry.getClassPath("ANT");
ClassPath runtimeClasspath = classPathRegistry.getClassPath("GRADLE_RUNTIME");
ClassLoader antClassLoader = classLoaderFactory.createIsolatedClassLoader(antClasspath);
ClassLoader runtimeClassLoader = new MutableURLClassLoader(antClassLoader, runtimeClasspath);
Thread.currentThread().setContextClassLoader(runtimeClassLoader);
Class<?> mainClass = runtimeClassLoader.loadClass(mainClassName);
Object entryPoint = mainClass.newInstance();
Method mainMethod = mainClass.getMethod("run", String[].class);
mainMethod.invoke(entryPoint, new Object[]{args});
}
}