Simple HttpProxyCacheServer factory

/**
 * <strong>Not thread-safe</strong> {@link HttpProxyCacheServer} factory that returns single instance of proxy.
 *
 * @author Alexey Danilov (danikula@gmail.com).
 */
public class ProxyFactory {

    private static HttpProxyCacheServer sharedProxy;

    private ProxyFactory() {
    }

    public static HttpProxyCacheServer getProxy(Context context) {
        return sharedProxy == null ? (sharedProxy = newProxy(context)) : sharedProxy;
    }

    private static HttpProxyCacheServer newProxy(Context context) {
        FileNameGenerator nameGenerator = new Md5FileNameGenerator(context.getExternalCacheDir());
        return new HttpProxyCacheServer(nameGenerator);
    }
}