?using System;
using System.Configuration;
using System.Text;

namespace LogManage
{
    public class AbstractFactory
    {
        public static LogFactory CreateFactory()
        {
            string type = ConfigurationManager.AppSettings["factory"].ToString();
            switch (type)
            {
                case "txt":
                    return new TxtLogFactory();
                case "db":
                    return new DBLogFactory();
                case "xml":
                    return new XmlLogFactory();
                default:
                    return new TxtLogFactory();
            }
        }
    }
}