Sandbox::https://github.com/kenjava/java8-tutorial/blob/master/res/nashorn6.js

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load('http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore-min.js');

load('http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js');

// simple backbone model:

// valueOfGoods will automatically be calculated when stock or price changes

var Product = Backbone.Model.extend({

defaults: {

stock: 0,

price: 0.0,

name:'',

valueOfGoods: 0.0

initialize: function() {

this.on('change:stock change:price', function() {

var stock = this.get('stock');

var price = this.get('price');

var valueOfGoods = this.getValueOfGoods(stock, price);

this.set('valueOfGoods', valueOfGoods);

});

getValueOfGoods: function(stock, price) {

return stock * price;

}

});

var product = new Product();

product.set('name', 'Pencil');

product.set('stock', 1000);

product.set('price', 3.99);

// pass backbone model to java method

var Nashorn6 = Java.type('com.winterbe.java8.samples.nashorn.Nashorn6');

Nashorn6.getProduct(product.attributes);

// bind java object to backbone model and pass result back to java

var calculate = function(javaProduct) {

var model = new Product();

model.set('name', javaProduct.name);

model.set('price', javaProduct.price);

model.set('stock', javaProduct.stock);

return model.attributes;

};