#// Usage: jjs -scripting interface2.js

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// Simple example demonstrating how to implement java interface

// whose methods are backed by script methods of a script object

var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager");

// create manager

var manager = new ScriptEngineManager();

// create engine

var engine = manager.getEngineByName("js");

// eval code - too many script escapes?

// use heredoc !

engine.eval(<<CODE

  var obj = {

    run: function() {

        print("I am run method of 'obj'");

    }

  };

CODE);

// create Java interface object whose methods are

// implemented by script methods of a script object

// This is from javax.script.Invocable. But we are

// in JS world, don't worry about types :)

var Runnable = Java.type("java.lang.Runnable");

var scriptObj = engine.get("obj");

var r = engine.getInterface(scriptObj, Runnable.class);

print(r.class);

r.run();