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Smack is an Open Source XMPP (Jabber) client library for instant messaging and presence. This library provides the client side functionality as specified in the extensions to the XMPP specifications as related to the client side of said specifications.

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package org.jivesoftware.smack.proxy;

import javax.net.SocketFactory;

/**
 * Class which stores proxy information such as proxy type, host, port, 
 * authentication etc.
 * 
 * @author Atul Aggarwal
 */

public class ProxyInfo
{
    public static enum ProxyType
    {
        NONE,
        HTTP,
        SOCKS4,
        SOCKS5
    }
    
    private String proxyAddress;
    private int proxyPort;
    private String proxyUsername;
    private String proxyPassword;
    private ProxyType proxyType;
    
    public ProxyInfo(   ProxyType pType, String pHost, int pPort, String pUser, 
                        String pPass)
    {
        this.proxyType = pType;
        this.proxyAddress = pHost;
        this.proxyPort = pPort;
        this.proxyUsername = pUser;
        this.proxyPassword = pPass;
    }
    
    public static ProxyInfo forHttpProxy(String pHost, int pPort, String pUser, 
                                    String pPass)
    {
        return new ProxyInfo(ProxyType.HTTP, pHost, pPort, pUser, pPass);
    }
    
    public static ProxyInfo forSocks4Proxy(String pHost, int pPort, String pUser, 
                                    String pPass)
    {
        return new ProxyInfo(ProxyType.SOCKS4, pHost, pPort, pUser, pPass);
    }
    
    public static ProxyInfo forSocks5Proxy(String pHost, int pPort, String pUser, 
                                    String pPass)
    {
        return new ProxyInfo(ProxyType.SOCKS5, pHost, pPort, pUser, pPass);
    }
    
    public static ProxyInfo forNoProxy()
    {
        return new ProxyInfo(ProxyType.NONE, null, 0, null, null);
    }
    
    public static ProxyInfo forDefaultProxy()
    {
        return new ProxyInfo(ProxyType.NONE, null, 0, null, null);
    }
    
    public ProxyType getProxyType()
    {
        return proxyType;
    }
    
    public String getProxyAddress()
    {
        return proxyAddress;
    }
    
    public int getProxyPort()
    {
        return proxyPort;
    }
    
    public String getProxyUsername()
    {
        return proxyUsername;
    }
    
    public String getProxyPassword()
    {
        return proxyPassword;
    }
    
    public SocketFactory getSocketFactory()
    {
        if(proxyType == ProxyType.NONE)
        {
            return new DirectSocketFactory();
        }
        else if(proxyType == ProxyType.HTTP)
        {
            return new HTTPProxySocketFactory(this);
        }
        else if(proxyType == ProxyType.SOCKS4)
        {
            return new Socks4ProxySocketFactory(this);
        }
        else if(proxyType == ProxyType.SOCKS5)
        {
            return new Socks5ProxySocketFactory(this);
        }
        else
        {
            return null;
        }
    }
}