JarChecker

JarChecker.java

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class JarChecker {
	public static void main(String[] args) throws Exception {
		List<String> classes = new ArrayList<String>();
		List<URL> urls = new ArrayList<URL>();
		for (String path : args) {
			File file = new File(path);
			classes.addAll(getAllClasses(file));
			urls.add(file.toURI().toURL());
		}

		ClassLoader loader = URLClassLoader.newInstance(urls
				.toArray(new URL[] {}));

		List<String> names = new ArrayList<String>();
		for (String className : classes) {
			names.addAll(getAllMethodNames(loader, className));
		}

		Collections.sort(names);
		for (String name : names) {
			System.out.println(name);
		}
	}

	private static List<String> getAllMethodNames(ClassLoader loader,
			String className) throws ClassNotFoundException {
		Class<?> klass = loader.loadClass(className);
		Method[] methods = klass.getMethods();
		List<String> names = new ArrayList<String>();
		for (Method method : methods) {
			if ((method.getModifiers() & Modifier.PRIVATE) != 0)
				continue;
			names.add(method.toString());
		}
		return names;
	}

	private static List<String> getAllClasses(File file) throws IOException {
		JarFile jarFile = new JarFile(file);
		try {
			List<String> classes = new ArrayList<String>();
			for (Enumeration<JarEntry> e = jarFile.entries(); e
					.hasMoreElements();) {
				JarEntry entry = e.nextElement();
				String name = entry.getName();
				if (name.endsWith(".class")) {
					classes.add(name.replace('/', '.').replace(".class", ""));
				}
			}
			return classes;
		} finally {
			jarFile.close();
		}
	}
}