Test of package loading

TestPackageLoading.java

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;


public class TestPackageLoading
{
    private static final class TestLoader extends URLClassLoader
    {
        private TestLoader(URL[] urls)
        {
            super(urls,null);
        }

        public Class<?> testDefineClass(String name, byte[] b, int off, int len)
        {
            return defineClass(name,b,off,len);
        }
        
        @Override
        public Package getPackage(String name)
        {
            // TODO Auto-generated method stub
            return super.getPackage(name);
        }

        @Override
        public Package[] getPackages()
        {
            // TODO Auto-generated method stub
            return super.getPackages();
        }
    }

    public static void main(String[] args) throws Exception
    {
        File classes = new File("./target/classes").getAbsoluteFile();

        TestLoader loader = new TestLoader(new URL[] {classes.toURI().toURL()});

        Class<?> c = loader.loadClass("org.eclipse.jetty.classloader.transformer.message.nopackagedefinedmessage.ObjectFactory");
        System.err.println(c);
        Arrays.asList(loader.getPackages()).stream().map(Package::getName).filter(s->s.startsWith("org.eclipse.")).forEach(System.err::println);
        loader.close();
        

        loader = new TestLoader(new URL[] {classes.toURI().toURL()});
        File classfile = new File("./target/classes/org/eclipse/jetty/classloader/transformer/message/nopackagedefinedmessage/ObjectFactory.class");
        int len=(int)classfile.length();
        byte[] data = new byte[len];
        try(InputStream in = new FileInputStream(classfile))
        {
            int pos=0;
            while (pos<len)
                pos += in.read(data,pos,len-pos);
        }

        c = loader.testDefineClass("org.eclipse.jetty.classloader.transformer.message.nopackagedefinedmessage.ObjectFactory",data,0,len);
        System.err.println(c);
        Arrays.asList(loader.getPackages()).stream().map(Package::getName).filter(s->s.startsWith("org.eclipse.")).forEach(System.err::println);


    }
}