private static Func <object, object> GetConverter(StandardMapper mapper, PocoColumn pc, Type srcType, Type dstType)
{
Func <object, object> converter = null;
// Get converter from the mapper
if (pc != null)
{
converter = mapper.GetFromDbConverter(pc.PropertyInfo, srcType);
if (converter != null)
{
return(converter);
}
}
// Standard DateTime->Utc mapper
if (pc != null && pc.ForceToUtc && srcType == typeof(DateTime) && (dstType == typeof(DateTime) || dstType == typeof(DateTime?)))
{
return(delegate(object src) { return new DateTime(((DateTime)src).Ticks, DateTimeKind.Utc); });
}
// unwrap nullable types
Type underlyingDstType = Nullable.GetUnderlyingType(dstType);
if (underlyingDstType != null)
{
dstType = underlyingDstType;
}
// Forced type conversion including integral types -> enum
if (dstType.IsEnum && IsIntegralType(srcType))
{
var backingDstType = Enum.GetUnderlyingType(dstType);
if (underlyingDstType != null)
{
// if dstType is Nullable<Enum>, convert to enum value
return(delegate(object src) { return Enum.ToObject(dstType, src); });
}
else if (srcType != backingDstType)
{
return(delegate(object src) { return Convert.ChangeType(src, backingDstType, null); });
}
}
else if (!dstType.IsAssignableFrom(srcType))
{
if (dstType.IsEnum && srcType == typeof(string))
{
return(delegate(object src) { return EnumMapper.EnumFromString(dstType, (string)src); });
}
else if (dstType == typeof(Guid) && srcType == typeof(string))
{
return(delegate(object src) { return Guid.Parse((string)src); });
}
else
{
return(delegate(object src) { return Convert.ChangeType(src, dstType, null); });
}
}
return(null);
}
public Func <object, object> GetFromDbConverter(PropertyInfo targetProperty, Type sourceType)
{
var t = targetProperty.PropertyType;
if (typeof(IIdentity <int>).IsAssignableFrom(t))
{
var ctor = t.GetConstructor(new Type[] { typeof(Int32) });
return((x) => ctor.Invoke(new object[] { (int)x }));
}
else if (typeof(IIdentity <Guid>).IsAssignableFrom(t))
{
var ctor = t.GetConstructor(new Type[] { typeof(Guid) });
return((x) => ctor.Invoke(new object[] { (Guid)x }));
}
else
{
return(standardMapper.GetFromDbConverter(targetProperty, sourceType));
}
}
