rascal

UndeclaredJavaMethod: Trouble linking Java method from Rascal

I am having trouble linking a Java method in Rascal.

I have two files:

Func.rsc:

module Func

import Type;

import lang::flybytes::Compiler;

//other stuff

@javaClass{Func}
java void lalala();

//other stuff

Func.java:

import io.usethesource.vallang.IValue;
import io.usethesource.vallang.IValueFactory;

public class Func {

    private final IValueFactory vf;

    public Func(final IValueFactory vf) {
       this.vf = vf;
    }

    public void lalala() {
        System.out.println(2);
    }

}

Now, running the Rascal shell and importing Func as follows gives me an error:

(base) bys1@MBP-21-19 flybytes-evalgen % java -cp rascal.jar:. org.rascalmpl.shell.RascalShell
Version: 0.26.5
INFO: detected |lib://rascal| at |jar+file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/rascal.jar!/|
INFO: detected |lib://flybytes-evalgen| at |file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/|
WARNING: could not resolve dependency on: |lib://flybytes| because it does not seem to exist as a project or a library.
rascal>import Func;
Loading module |file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/src/main/rascal/Func.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/Syntax.rsc|
INFO: resolved |lib://rascal| at |jar+file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/rascal.jar!/|
Loading module |lib://rascal/List.rsc|
Loading module |lib://rascal/Map.rsc|
Loading module |lib://rascal/IO.rsc|
Loading module |lib://rascal/Exception.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/Compiler.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/Mirror.rsc|
Loading module |lib://rascal/util/Maybe.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/api/String.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/api/Object.rsc|
Loading module |jar+file:///Users/bys1/.m2/repository/org/rascalmpl/flybytes/0.1.7/flybytes-0.1.7.jar!/src/lang/flybytes/api/System.rsc|
Loading module |lib://rascal/Type.rsc|
Warning: Could not load Func due to: No such Java method: Func.lalala()
Advice: |http://tutor.rascal-mpl.org/Errors/Static/UndeclaredJavaMethod/UndeclaredJavaMethod.html| at |file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/src/main/rascal/Func.rsc|(387,36,<21,0>,<22,19>)
|file:///Users/bys1/Documents/RUG/FBEG/flybytes-evalgen/src/main/rascal/Func.rsc|(387,36,<21,0>,<22,19>): No such Java method: Func.lalala()
Advice: |http://tutor.rascal-mpl.org/Errors/Static/UndeclaredJavaMethod/UndeclaredJavaMethod.html|
ok
rascal>:quit
Quiting REPL

I have also tried packing Func.java into a jar and including the jar when running the Rascal shell, but that did not help me either (or I simply did that the wrong way...)

How can I successfully call my Java method from Rascal?

Solution

  • It might be that the Func.class file is not in the . folder but nested somewhere else. Is that it?