It appears that only with static path I was able to run the example.
However the virtual function override does not catch: is it parameters problem?

onRequest.m:

function res  = onRequest(this, cmd)
res = cmd;

schema.m:

% ...
% define class methods
% onRequest.m overloads java onRequest method
m = schema.method(svrClass, 'onRequest');
s = m.Signature;
s.varargin    = 'off';
s.InputTypes  = {'string'};
s.OutputTypes = {'string'};

However, I see only the method of the base class running (the override does not catch):

@Override
public String onRequest(String request) {
    System.out.println("### (onRequest)");
    return "";
}

I fixed the post text

Hi Yuri,

This example works with most MATLAB releases through R2016a. If you download the zip file and use those files it should work. If you are copying the code from the text of the article there is a syntax error in the schema.m file for simple.ServerSocket. Line 1 should be:

function schema

rather than:

function schema.m

Donn

I have a couple of questions:
1. Is this sample compatible with Matlab 2014b?
2. How this sample would look with +package and classdef definitions?

Currently I get the following error when I try your sample (everything relevant is added on the matlab path)

ss = simple.SeverSocket

Undefined variable “simple” or function “simple.SeverSocket”.

@Ed – I’m not exactly sure what you mean, but if you’re saying that you only have the class name and wish to avoid instantiating a class object, then you can use Matlab’s eval function to evaluate it in run-time. If you need additional assistance then contact me by email (altmany at gmail) for a short consultancy.

Correction. Using MATLAB, can I get the JAVA base class of my UDD based extension?

Yair,

If I need to use the java class directly, I need help on one other piece. My MATLAB class is derived from one of two java classes. This decision is made in the schema.m file and is based on an environment variable. Using UDD, can I get the java class that is used without having to instantiate an object?

PS. Sorry if this is posted out of order, but there was no reply button under your helpful suggestion.

@Ed – assuming your static constants are public (which they must be, otherwise you cannot use them in Matlab), you can simply use the classname:

myField = MyJavaClassName.static_field_name;

My java class defines several static constants that I want to expose to the matlab class. I want them to be referenced without having to have instantiated the MATLAB class. If this is possible, what is the syntax.

Thanks,
Ed

@Donn,

Thanks for your help, that’s what I had done before reading your article. It would have been nice to keep all the code in matlab but if it’s not possible..

Thanks anyway, Happy new year.