com.javonet.core.analyzer.InterfaceAnalyzer Maven / Gradle / Ivy

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Javonet allows you to reference and use modules or packages written in (Java/Kotlin/Groovy/Clojure, C#/VB.NET, Ruby, Perl, Python, JavaScript/TypeScript) like they were created in your technology. It works on Linux/Windows and MacOS for applications created in JVM, CLR/Netcore, Perl, Python, Ruby, NodeJS, C++ or GoLang and gives you unparalleled freedom and flexibility with native performance in building your mixed-technologies products. Let it be accessing best AI or cryptography libraries, devices SDKs, legacy client modules, internal custom packages or anything from public repositories available on NPM, Nuget, PyPI, Maven/Gradle, RubyGems or GitHub. Get free from programming languages barriers today! For more information check out our guides at https://www.javonet.com/guides/v2/

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package com.javonet.core.analyzer;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.*;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class InterfaceAnalyzer {


    public static LinkedList > returnClassesFromJar(String jarPath) {
        File f = new File(jarPath);
        LinkedList> classQueue = new LinkedList <>();
        if (f.exists()) {
            try {
                JarFile jarFile = new JarFile(jarPath);
                Enumeration e = jarFile.entries();

                URL[] urls = {new URL("jar:file:" + jarPath + "!/")};
                URLClassLoader cl = URLClassLoader.newInstance(urls);


                while (e.hasMoreElements()) {
                    JarEntry je = e.nextElement();
                    if (je.isDirectory() || !je.getName().endsWith(".class") || je.getName().contains("$")) {
                        continue;
                    }
                    // -6 because of .class
                    String className = je.getName().substring(0, je.getName().length() - 6);
                    className = className.replace('/', '.');

                    Class c = cl.loadClass(className);
                    classQueue.add(c);
                }
            } catch (IOException | ClassNotFoundException e) {
                e.printStackTrace();
            }
            return classQueue;
        } else {
            throw new RuntimeException("Jar does not exists: " + jarPath);
        }
    }
}