I want to construct some tests depending on the tokens used in a specific rule of my grammar.

void myrule() : {} {
<K_MYKEYWORD1>
| <K_MYKEYWORD2>
}

So I have a jjt file and need to transform this in a jj file and then parse this and get the AST - node tree, to traverse it.

My first attempt was this:

var parser = new JJTreeParser(
                Files.newInputStream(Paths.get("src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt"))
) {
    public ASTGrammar getRoot() {
        return (ASTGrammar)jjtree.rootNode());
    }
};
parser.javacc_input();

new JavaCodeGenerator().visit(parser.getRoot(), io);

But I have to fight method and class visibility issues:

IO is only package private, ASTGrammer.generate is package private as well.