/*
 * Copyright (c) OSGi Alliance (2002, 2015). All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.osgi.service.url;

import java.net.InetAddress;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import org.osgi.annotation.versioning.ConsumerType;

Abstract implementation of the URLStreamHandlerService interface. All the methods simply invoke the corresponding methods on java.net.URLStreamHandler except for parseURL and setURL, which use the URLStreamHandlerSetter parameter. Subclasses of this abstract class should not need to override the setURL and parseURL(URLStreamHandlerSetter,...) methods. 
Author:
$Id: 71ce6a3846e0b82b2e096ae7617c2af7a1297f0e $
@ThreadSafe
/**
 * Abstract implementation of the {@code URLStreamHandlerService} interface. All
 * the methods simply invoke the corresponding methods on
 * {@code java.net.URLStreamHandler} except for {@code parseURL} and
 * {@code setURL}, which use the {@code URLStreamHandlerSetter} parameter.
 * Subclasses of this abstract class should not need to override the
 * {@code setURL} and {@code parseURL(URLStreamHandlerSetter,...)} methods.
 * 
 * @ThreadSafe
 * @author $Id: 71ce6a3846e0b82b2e096ae7617c2af7a1297f0e $
 */
@ConsumerType
public abstract class AbstractURLStreamHandlerService extends URLStreamHandler implements URLStreamHandlerService {
	
See Also:
java.net.URLStreamHandler.openConnection/**
	 * @see "java.net.URLStreamHandler.openConnection"
	 */
	@Override
	public abstract URLConnection openConnection(URL u) throws java.io.IOException;

	
The URLStreamHandlerSetter object passed to the parseURL method. /**
	 * The {@code URLStreamHandlerSetter} object passed to the parseURL method.
	 */
	protected volatile URLStreamHandlerSetter	realHandler;

	
Parse a URL using the URLStreamHandlerSetter object. This method sets the realHandler field with the specified URLStreamHandlerSetter object and then calls parseURL(URL,String,int,int). 
Params:
realHandler – The object on which the setURL method must be invoked for the specified URL.
See Also:
java.net.URLStreamHandler.parseURL/**
	 * Parse a URL using the {@code URLStreamHandlerSetter} object. This method
	 * sets the {@code realHandler} field with the specified
	 * {@code URLStreamHandlerSetter} object and then calls
	 * {@code parseURL(URL,String,int,int)}.
	 * 
	 * @param realHandler The object on which the {@code setURL} method must be
	 *        invoked for the specified URL.
	 * @see "java.net.URLStreamHandler.parseURL"
	 */
	@Override
	public void parseURL(@SuppressWarnings("hiding") URLStreamHandlerSetter realHandler, URL u, String spec, int start, int limit) {
		this.realHandler = realHandler;
		parseURL(u, spec, start, limit);
	}

	
This method calls super.toExternalForm. 
See Also:
java.net.URLStreamHandler.toExternalForm/**
	 * This method calls {@code super.toExternalForm}.
	 * 
	 * @see "java.net.URLStreamHandler.toExternalForm"
	 */
	@Override
	public String toExternalForm(URL u) {
		return super.toExternalForm(u);
	}

	
This method calls super.equals(URL,URL). 
See Also:
java.net.URLStreamHandler.equals(URL,URL)/**
	 * This method calls {@code super.equals(URL,URL)}.
	 * 
	 * @see "java.net.URLStreamHandler.equals(URL,URL)"
	 */
	@Override
	public boolean equals(URL u1, URL u2) {
		return super.equals(u1, u2);
	}

	
This method calls super.getDefaultPort. 
See Also:
java.net.URLStreamHandler.getDefaultPort/**
	 * This method calls {@code super.getDefaultPort}.
	 * 
	 * @see "java.net.URLStreamHandler.getDefaultPort"
	 */
	@Override
	public int getDefaultPort() {
		return super.getDefaultPort();
	}

	
This method calls super.getHostAddress. 
See Also:
java.net.URLStreamHandler.getHostAddress/**
	 * This method calls {@code super.getHostAddress}.
	 * 
	 * @see "java.net.URLStreamHandler.getHostAddress"
	 */
	@Override
	public InetAddress getHostAddress(URL u) {
		return super.getHostAddress(u);
	}

	
This method calls super.hashCode(URL). 
See Also:
java.net.URLStreamHandler.hashCode(URL)/**
	 * This method calls {@code super.hashCode(URL)}.
	 * 
	 * @see "java.net.URLStreamHandler.hashCode(URL)"
	 */
	@Override
	public int hashCode(URL u) {
		return super.hashCode(u);
	}

	
This method calls super.hostsEqual. 
See Also:
java.net.URLStreamHandler.hostsEqual/**
	 * This method calls {@code super.hostsEqual}.
	 * 
	 * @see "java.net.URLStreamHandler.hostsEqual"
	 */
	@Override
	public boolean hostsEqual(URL u1, URL u2) {
		return super.hostsEqual(u1, u2);
	}

	
This method calls super.sameFile. 
See Also:
java.net.URLStreamHandler.sameFile/**
	 * This method calls {@code super.sameFile}.
	 * 
	 * @see "java.net.URLStreamHandler.sameFile"
	 */
	@Override
	public boolean sameFile(URL u1, URL u2) {
		return super.sameFile(u1, u2);
	}

	
This method calls realHandler.setURL(URL,String,String,int,String,String). 
See Also:
java.net.URLStreamHandler.setURL(URL,String,String,int,String,String)
Deprecated:
This method is only for compatibility with handlers written
            for JDK 1.1./**
	 * This method calls
	 * {@code realHandler.setURL(URL,String,String,int,String,String)}.
	 * 
	 * @see "java.net.URLStreamHandler.setURL(URL,String,String,int,String,String)"
	 * @deprecated This method is only for compatibility with handlers written
	 *             for JDK 1.1.
	 */
	@Override
	protected void setURL(URL u, String proto, String host, int port, String file, String ref) {
		realHandler.setURL(u, proto, host, port, file, ref);
	}

	
This method calls realHandler.setURL(URL,String,String,int,String,String,String,String) . 
See Also:
java.net.URLStreamHandler.setURL(URL,String,String,int,String,String,String,String)/**
	 * This method calls
	 * {@code realHandler.setURL(URL,String,String,int,String,String,String,String)}
	 * .
	 * 
	 * @see "java.net.URLStreamHandler.setURL(URL,String,String,int,String,String,String,String)"
	 */
	@Override
	protected void setURL(URL u, String proto, String host, int port, String auth, String user, String path, String query, String ref) {
		realHandler.setURL(u, proto, host, port, auth, user, path, query, ref);
	}
}