parser.setLanguage() error

[gsalmh]

public class App {
    static {
       System.load("/code/java-tree-sitter/libjava-tree-sitter.so");
    }
    public String getGreeting() {
        return "Hello world.";
    }

    public static void main(String[] args) throws UnsupportedEncodingException {
        System.out.println(new App().getGreeting());

        try (Parser parser = new Parser()) {
            parser.setLanguage(Languages.python());
            try (Tree tree = parser.parseString("print(\"hi\")")) {
                System.out.println(tree.getRootNode().getNodeString());
            }
        }
    }
}

When i ran code above, the program can load "libjava-tree-sitter.so" successfully, but encountered the following exception.I tried to solve the problem according to the method in this link，but it didn't work.

Exception in thread "main" java.lang.UnsatisfiedLinkError: 'long ai.serenade.treesitter.Languages.javascript()'
        at ai.serenade.treesitter.Languages.javascript(Native Method)
        at demo.App.main(App.java:36)

program enviroment:
CentOS Linux release 7.9.2009
openjdk version "11.0.11" 2021-04-20
gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC)

So any idea what can i do ?

[sogaiu]

The error message mentions tree-sitter-javascript. That particular grammar / parser does not use C++, but rather C-only: https://github.com/tree-sitter/tree-sitter-javascript/tree/master/src Note the lack of .cpp files there.

That matches a condition mentioned in this PR. Specifically the 3rd condition.

Even though that PR also mentions M1 and macos (the 1st condition), I believe the PR may be relevant to situations like the error message hints at as I also encountered a similar situation and things worked for me with changes similar to some of those in the PR.

I think it's possible that trying the code in the PR might help.

Alternatively, if you work with only grammars / parsers that have some C++ in them (look in the grammar's src directory for scanner.cpp), that might also get things working.

It would be nice if that PR or something similar got merged but unfortunately it looks like the maintainer(s) have not been around to attend to this situation for a while.