Converting Java String to JavaScript object and passing it to a JavaScript procedure

Hi,

I am trying to convert a Java String into a JavaScript object and pass it to a JavaScript function in a .js file. Please note that the "fields" String in my code below is not of JSON format but is in the format of a JavaScript Object literal. That is the keys are not Strings, not enclosed in double quotes. So, I need to convert it into a JavaScript Object and not a JSON Object. Please see my simplified code below:

import javax.script.*; public class Test { public static void main(String[] args) throws Exception { ScriptEngineManager factory = new ScriptEngineManager(); ScriptEngine engine = factory.getEngineByName("JavaScript"); String filepath = "../test.js"; engine.eval(new java.io.FileReader(filepath)); Invocable invocableEngine = (Invocable)jsEngine; String fields = "[ { consume: [{ name: value }], produces: [] }, { consume: [], produces: [[val1, val2, val3]] }]"; // How Transform fields to JavaScript Object and pass it to transform function in test.js file // The returned JavaScript Object from transform method should be parsed into a Java String // The line below throws an error because I didn't convert fields into a JavaScript object literal String check = (String) invocableEngine.invokeFunction("transform", fields); } }


test.js
function transform(fields) { for (var i = 0; i < fields.length; i++) { var module = fields[i]; for (var j = 0; j < module.produces.length; j++) { println("Index is: " + j); } } return fields; }

When I run the Java Code, the following error is thrown when the transform function is invoked:
sun.org.mozilla.javascript.internal.EcmaError: TypeError: Cannot read property "length"

Thanks,
Sony

Moving for an appropriate forum