/*
 * Copyright (c) 2008-2019 Emmanuel Dupuy.
 * This project is distributed under the GPLv3 license.
 * This is a Copyleft license that gives the user the right to use,
 * copy and modify the code freely for non-commercial purposes.
 */

package org.jd.gui.util.parser.antlr;

import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import org.jd.gui.util.exception.ExceptionUtil;

public class ANTLRJavaParser {
    public static void parse(CharStream input, JavaListener listener) {
        try {
            JavaLexer lexer = new JavaLexer(input);

            lexer.removeErrorListeners();

            CommonTokenStream tokens = new CommonTokenStream(lexer);
            JavaParser parser = new JavaParser(tokens);

            parser.removeErrorListeners();

            ParseTree tree = parser.compilationUnit();

            ParseTreeWalker.DEFAULT.walk(listener, tree);
        } catch (StackOverflowError e) {
            // Too complex source file, probably not written by a human.
            // This error may happen on Java file generated by ANTLR for example.
            assert ExceptionUtil.printStackTrace(e);
        }
    }
}