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Editorial Team
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Asked: 2026-05-11T17:24:40+00:00

I’m designing an API (in Java) and expect to have users accessing the API

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I’m designing an API (in Java) and expect to have users accessing the API from Matlab. The problem is that I want the API to provide a piece of functionality like:

javaApi.waitUntilPredicateIsTrue(Predicate<JavaObj> test);

My API (in the background) gets hold of instances of Java Obj (via some mechanism, e.g. polling). I want this API method to block until one of these instances, when passed to the Predicate evaluates to true. If I was calling this API from Java, I’d do:

javaApi.waitUntilPredicateIsTrue(new Predicate<JavaObj>() {
    public boolean evaluate(JavaObj jo) {
        return "READY".equals(jo.getState());
    }
});

You get the idea.

How can this be called from within Matlab? Can I use anonymous inner classes from Matlab? Can I declare a Matlab classdef which extends the interface Predicate (can this cope with the Java generic version)?

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1 Answer

  1. Editorial Team

    That sounds like a tough question. I’m still running R2006b so this may have changed, but it looks like MATLAB will not translate function handles (incl. anonymous functions) and structures into Java objects. I don’t know about MATLAB custom classes, since the syntax has changed. Strings, arrays, and cell arrays will translate properly. They don’t comment at all on implementing interfaces. (:p :p :p BOO HISS)

    edit: just found this page on Matlab Central, it talks about some undocumented interfaces.

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