using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SinoChemCommonUtilities
{
    public static class DbFieldReader
    {
        public static T SafelyReadDbField<T>(object rawFieldValue)
        {
            if (!DBNull.Value.Equals(rawFieldValue))
            {
                return (T)Convert.ChangeType(rawFieldValue, typeof(T));
            }
            else // return default value for each type if db null 
            {
                if (typeof(T) == typeof(string))
                {
                    return (T)Convert.ChangeType("", typeof(string));
                }
                else if (typeof(T) == typeof(DateTime))
                {
                    return (T)Convert.ChangeType(DateTime.Now, typeof(DateTime));
                }
                else
                {
                    return default(T);
                }
            }
        }
    }
}