public Socket createSocket(String host,
    int port,
    InetAddress localAddress,
    int localPort,
    HttpParams params) throws IOException, UnknownHostException 
{
        if (params == null) {
            throw new IllegalArgumentException("Parameters may not be null");
        }
        int timeout = HttpConnectionParams.getConnectionTimeout(params);
        if (timeout != 0) {
            throw new IllegalStateException("Connection timeout is not supported in old IO mode");
        }
        if (localAddress != null) {
            return new Socket(host, port, localAddress, localPort);
        } else {
            return new Socket(host, port);
        }
}

Attempts to get a new socket connection to using old (pre Java 1.4) IO mode. This socket factory does not support connect timeout as it requires Java 1.4 functionality.

 public boolean equals(Object obj) 
{
        return ((obj != null) && obj.getClass().equals(PlainSocketFactory.class));
}

All instances of DefaultProtocolSocketFactory are the same.

 public static PlainSocketFactory getSocketFactory() 
{
        return DEFAULT_FACTORY;
}

Gets an singleton instance of the DefaultProtocolSocketFactory.

 public int hashCode() 
{
        return PlainSocketFactory.class.hashCode();
}

All instances of DefaultProtocolSocketFactory have the same hash code.