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package com.sun.jndi.url.dns;


import java.net.MalformedURLException;
import java.util.Hashtable;

import javax.naming.*;
import javax.naming.spi.ResolveResult;
import com.sun.jndi.dns.*;
import com.sun.jndi.toolkit.url.GenericURLDirContext;


A DNS URL context resolves names that are DNS pseudo-URLs.
See com.sun.jndi.dns.DnsUrl for a description of the URL format.
Author:
Scott Seligman/**
 * A DNS URL context resolves names that are DNS pseudo-URLs.
 * See com.sun.jndi.dns.DnsUrl for a description of the URL format.
 *
 * @author Scott Seligman
 */


public class dnsURLContext extends GenericURLDirContext {

    public dnsURLContext(Hashtable env) {
        super(env);
    }

    
Resolves the host and port of "url" to a root context connected
to the named DNS server, and returns the domain name as the
remaining name.
/**
     * Resolves the host and port of "url" to a root context connected
     * to the named DNS server, and returns the domain name as the
     * remaining name.
     */
    protected ResolveResult getRootURLContext(String url, Hashtable env)
            throws NamingException {

        DnsUrl dnsUrl;
        try {
            dnsUrl = new DnsUrl(url);
        } catch (MalformedURLException e) {
            throw new InvalidNameException(e.getMessage());
        }

        DnsUrl[] urls = new DnsUrl[] { dnsUrl };
        String domain = dnsUrl.getDomain();

        return new ResolveResult(
                DnsContextFactory.getContext(".", urls, env),
                new CompositeName().add(domain));
    }
}