PackageScanner.java

/*
 * Copyright (C) 2020-2024 by Savoir-faire Linux
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
package net.jami.jams.common.annotations;

import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class PackageScanner {

    public static ArrayList<String> getClasses(String jarFile) throws Exception {
        ArrayList<String> classNames = new ArrayList<>();
        ZipInputStream zip =
                new ZipInputStream(
                        new FileInputStream(
                                System.getProperty("user.dir") + File.separator + jarFile));
        for (ZipEntry entry = zip.getNextEntry(); entry != null; entry = zip.getNextEntry()) {
            if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
                // This ZipEntry represents a class. Now, what class does it represent?
                String className = entry.getName().replace('/', '.'); // including ".class"
                classNames.add(className.substring(0, className.length() - ".class".length()));
            }
        }
        return classNames;
    }
}