import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Collections;

/**
 * A crappy little toy exercise not intended for actual usage.
 * Given a URL as first argument, prints the component parts on separate lines
 * all fancy-like.  Also does some silly guessing when there's no port
 * provided.  Unmazing.
 */
public class URLParts {
    public static final Map<String, Integer> defaultPorts;
    static {
        Map<String, Integer> tmpMap = new HashMap<String, Integer>();
        tmpMap.put("http", 80);
        tmpMap.put("https", 443);
        tmpMap.put("file", -1);
        defaultPorts = Collections.unmodifiableMap(tmpMap);
    }

    public static void main(String[] args) throws Exception {
        for (int i = 0; i < args.length; i++) {
            showParts(new URL(args[i]));
        }
    }

    public static void showParts(URL url) {
        String protocol = url.getProtocol();
        int port = url.getPort();
        if (port == -1) {
            port = getDefaultPortForProtocol(protocol);
        }

        showPart("protocol", protocol);
        showPart("host", url.getHost());
        showPart("port", Integer.toString(port));
    }

    public static void showPart(String name, String value) {
        System.out.println(String.format("%s: %s", name, value));
    }

    public static int getDefaultPortForProtocol(String protocol) {
        if (protocol == null) {
            protocol = "http";
        } else {
            protocol = protocol.toLowerCase();
        }
        return defaultPorts.get(protocol);
    }
}