Hi,
I've been reading the documentation, wiki and the examples from Nashorn and have a question that I cannot find a yes/no answer to. Say for example that I've an application that leverages on Nashorn for JavaScript execution but its core is in Java. In my Java code I've a interface like: interface Foo { void doSomething(Bar bar); } Now from Nashorn I'd like to invoke the method "doSomething" like: foo.doSomethin({key: 'value'}); As expected this won't work since Nashorn does not know how to cast from "JSObject" to "Bar" however I'd like to register somewhere/somehow (this is what I don't know) a helper class/method/something where I could do this. I also do not want to bring Nashorn API/types to Java to I'm not looking for something like: class Bar implements JSObject { ... } Is this possible? and it is possible with JDK8? Thanks! Paulo