Copyright (c) 2003, 2012 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2003, 2012 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.osgi.internal.url;

import java.io.IOException;
import java.net.*;
import org.osgi.service.url.URLStreamHandlerService;
import org.osgi.service.url.URLStreamHandlerSetter;

The NullURLStreamService is created when a registered URLStreamHandler service
with an associated URLStreamHandlerProxy becomes unregistered.  The associated
URLStreamHandlerProxy must still handle all future requests for the now unregistered
scheme (the JVM caches URLStreamHandlers making up impossible to "unregister" them). 
When requests come in for an unregistered URLStreamHandlerService, the
NullURLStreamHandlerService is used in it's place.
/**
 * The NullURLStreamService is created when a registered URLStreamHandler service
 * with an associated URLStreamHandlerProxy becomes unregistered.  The associated
 * URLStreamHandlerProxy must still handle all future requests for the now unregistered
 * scheme (the JVM caches URLStreamHandlers making up impossible to "unregister" them). 
 * When requests come in for an unregistered URLStreamHandlerService, the
 * NullURLStreamHandlerService is used in it's place.
 */

public class NullURLStreamHandlerService implements URLStreamHandlerService {

	@Override
	public URLConnection openConnection(URL u) throws IOException {
		throw new MalformedURLException();
	}

	@Override
	public boolean equals(URL url1, URL url2) {
		throw new IllegalStateException();
	}

	@Override
	public int getDefaultPort() {
		throw new IllegalStateException();
	}

	@Override
	public InetAddress getHostAddress(URL url) {
		throw new IllegalStateException();
	}

	@Override
	public int hashCode(URL url) {
		throw new IllegalStateException();
	}

	@Override
	public boolean hostsEqual(URL url1, URL url2) {
		throw new IllegalStateException();
	}

	@Override
	public boolean sameFile(URL url1, URL url2) {
		throw new IllegalStateException();
	}

	public void setURL(URL u, String protocol, String host, int port, String authority, String userInfo, String file, String query, String ref) {
		throw new IllegalStateException();
	}

	public void setURL(URL u, String protocol, String host, int port, String file, String ref) {
		throw new IllegalStateException();
	}

	@Override
	public String toExternalForm(URL url) {
		throw new IllegalStateException();
	}

	@Override
	public void parseURL(URLStreamHandlerSetter realHandler, URL u, String spec, int start, int limit) {
		throw new IllegalStateException();
	}

}