#// Usage: jjs -scripting callmethod.js

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 *     from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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// simple example demonstrating calling a script object
// method from script engine user code

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 = {
        func: function() {
            print("I am func of " + this);
        },

        toString: function() {
            return "Object 'obj'";
        }
   };
CODE);

// invoke methods of an object in script world
// from javax.script.Invocable interface. But, hey, 
// calling code is JavaScript and don't worry about types :)

// get that script object on which to call a method
var scriptObj = engine.get("obj");
// call 'func' method on object 'obj'
engine.invokeMethod(scriptObj, "func");