/*
 * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/protocol/DefaultProtocolSocketFactory.java,v 1.5.2.2 2004/02/22 18:21:16 olegk Exp $
 * $Revision: 1.5.2.2 $
 * $Date: 2004/02/22 18:21:16 $
 *
 * ====================================================================
 *
 *  Copyright 2002-2004 The Apache Software Foundation
 *
 *  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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

package org.apache.commons.httpclient.protocol;

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * The default class for creating protocol sockets.  This class just uses the
 * {@link java.net.Socket socket} constructors.
 * 
 * @author Michael Becke
 * 
 * @since 2.0
 */
public class DefaultProtocolSocketFactory implements ProtocolSocketFactory {

    /**
     * The factory singleton.
     */
    private static final DefaultProtocolSocketFactory factory = new DefaultProtocolSocketFactory();
    
    /**
     * Gets an singleton instance of the DefaultProtocolSocketFactory.
     * @return a DefaultProtocolSocketFactory
     */
    static DefaultProtocolSocketFactory getSocketFactory() {
        return factory;
    }
    
    /**
     * Constructor for DefaultProtocolSocketFactory.
     */
    public DefaultProtocolSocketFactory() {
        super();
    }

    /**
     * @see #createSocket(java.lang.String,int,java.net.InetAddress,int)
     */
    public Socket createSocket(
        String host,
        int port,
        InetAddress clientHost,
        int clientPort
    ) throws IOException, UnknownHostException {
        return new Socket(host, port, clientHost, clientPort);
    }

    /**
     * @see ProtocolSocketFactory#createSocket(java.lang.String,int)
     */
    public Socket createSocket(String host, int port)
        throws IOException, UnknownHostException {
        return new Socket(host, port);
    }

    /**
     * All instances of DefaultProtocolSocketFactory are the same.
     */
    public boolean equals(Object obj) {
        return ((obj != null) && obj.getClass().equals(DefaultProtocolSocketFactory.class));
    }

    /**
     * All instances of DefaultProtocolSocketFactory have the same hash code.
     */
    public int hashCode() {
        return DefaultProtocolSocketFactory.class.hashCode();
    }

}