gcc/libjava/java/rmi/Naming.java

/*
  Copyright (c) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.

This file is part of GNU Classpath.

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it under the terms of the GNU General Public License as published by
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General Public License for more details.

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permission to link this library with independent modules to produce an
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exception statement from your version. */

package java.rmi;

import java.net.MalformedURLException;
import java.net.URL;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;

public final class Naming {

/**
 * Looks for the remote object that is associated with the named service.
 * Name and location is given in form of a URL without a scheme:
 *
 * <pre>
 * //host:port/service-name
 * </pre>
 *  
 * The port is optional.
 * 
 * @param name the service name and location
 * @return Remote-object that implements the named service
 * @throws NotBoundException if no object implements the service
 * @throws MalformedURLException 
 * @throws RemoteException
 */
public static Remote lookup(String name) throws NotBoundException, MalformedURLException, RemoteException {
	// hack to accept "rmi://host:port/service" strings
	if(name.startsWith("rmi:")){ name = name.substring(4); }
	URL u = new URL("http:" + name);
	String filename = u.getFile();

	// If the filename begins with a slash we must cut it for
	// name resolution.
	if (filename.charAt(0) == '/')
		return (getRegistry(u).lookup(filename.substring(1)));
	else
		return (getRegistry(u).lookup(filename));
}

/**
 * Try to bind the given object to the given service name. 
 * @param name
 * @param obj
 * @throws AlreadyBoundException
 * @throws MalformedURLException
 * @throws RemoteException
 */
public static void bind(String name, Remote obj) throws AlreadyBoundException, MalformedURLException, RemoteException {
	URL u = new URL("http:" + name);
	String filename = u.getFile();
	// If the filename begins with a slash we must cut it for
	// name resolution.
	if (filename.charAt(0) == '/')
		getRegistry(u).bind(filename.substring(1), obj);
	else
		getRegistry(u).bind(filename, obj);
}

/**
 * Remove a binding for a given service name.
 * @param name
 * @throws RemoteException
 * @throws NotBoundException
 * @throws MalformedURLException
 */
public static void unbind(String name) throws RemoteException, NotBoundException, MalformedURLException {
	URL u = new URL("http:" + name);
	String filename = u.getFile();
	// If the filename begins with a slash we must cut it for
	// name resolution.
	if (filename.charAt(0) == '/')
		getRegistry(u).unbind(filename.substring(1));
	else
		getRegistry(u).unbind(filename);
}

/**
 * Forces the binding between the given Remote-object and the given service name, even 
 * if there was already an object bound to this name. 
 * @param name
 * @param obj
 * @throws RemoteException
 * @throws MalformedURLException
 */
public static void rebind(String name, Remote obj) throws RemoteException, MalformedURLException {
	URL u = new URL("http:" + name);
	String filename = u.getFile();
	// If the filename begins with a slash we must cut it for
	// name resolution.
	if (filename.charAt(0) == '/')
		getRegistry(u).rebind(filename.substring(1), obj);
	else
		getRegistry(u).rebind(filename, obj);
}

/**
 * Lists all services at the named registry.
 * @param name url that specifies the registry
 * @return list of services at the name registry
 * @throws RemoteException
 * @throws MalformedURLException
 */
public static String[] list(String name) throws RemoteException, MalformedURLException {
	return (getRegistry(new URL("http:" + name)).list());
}

private static Registry getRegistry(URL u) throws RemoteException {
	if (u.getPort() == -1) {
		return (LocateRegistry.getRegistry(u.getHost()));
	}
	else {
		return (LocateRegistry.getRegistry(u.getHost(), u.getPort()));
	}
}

}