using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using NHibernate;
using NHibernate.SqlTypes;
using NHibernate.UserTypes;

namespace Sleis.Data.CustomTypes
{
    public class NullableDecimalType : IUserType
    {
        #region IUserType Members
        public bool Equals(object x, object y)
        {
            return object.Equals(x, y);
        }
        public int GetHashCode(object x)
        {
            return x.GetHashCode();
        }
        public object NullSafeGet(IDataReader rs, string[] names, object owner)
        {
            object valor = NHibernateUtil.Decimal.NullSafeGet(rs, names[0]);
            Decimal? inteiro = null;
            if (valor != null)
            {
                decimal normalized = (Decimal)valor;
               //possibly remove trailing 0 here.
                inteiro = ((Decimal)valor);
            }
            return inteiro;
        }
        public void NullSafeSet(IDbCommand cmd, object value, int index)
        {
            if (value == null)
            {
                NHibernateUtil.Decimal.NullSafeSet(cmd, null, index);
            }
            else
            {
                Decimal? inteiro = (Decimal)value;
                NHibernateUtil.Decimal.NullSafeSet(cmd, inteiro.Value.ToString().Replace(',', '.'), index);
            }
        }
        public object DeepCopy(object value)
        {
            return value;
        }
        public object Replace(object original, object target, object owner)
        {
            return original;
        }
        public object Assemble(object cached, object owner)
        {
            return cached;
        }
        public object Disassemble(object value)
        {
            return value;
        }
        public SqlType[] SqlTypes
        {
            get { return new SqlType[] { new StringSqlType() }; }
        }
        public Type ReturnedType
        {
            get { return typeof(string); }
        }
        public bool IsMutable
        {
            get { return false; }
        }
        #endregion
    }
}