import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

public class Handler extends URLStreamHandler {

    public static final String PROTOCOL_TYPE = "file";

    @Override
    protected URLConnection openConnection(URL u) throws IOException {
        return null;
    }

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

public class Handler extends URLStreamHandler {

    public static final String PROTOCOL_TYPE = "web";

    @Override
    protected URLConnection openConnection(URL u) throws IOException {
        return null;
    }

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

public class Handler extends URLStreamHandler {

    public static final String PROTOCOL_TYPE = "test";

    @Override
    protected URLConnection openConnection(URL u) throws IOException {
        return null;
    }

            try {
                final Class<Object> handlerClazz = ClassUtil.forName(basePackage + "." + protocol + ".Handler");
                final Field protocolTypeField = ClassUtil.getDeclaredField(handlerClazz, "PROTOCOL_TYPE");
                if (protocolTypeField.get(null) instanceof final String protocolType) {
                    if ("web".equalsIgnoreCase(protocolType)) {
                        addWebProtocol(protocol);