public static GetMemberDelegate CreateTypeConverter(Type fromType, Type toType)
{
if (fromType == toType)
{
return(null);
}
var converter = AutoMappingUtils.GetConverter(fromType, toType);
if (converter != null)
{
return(converter);
}
if (fromType == typeof(string))
{
return(fromValue => TypeSerializer.DeserializeFromString((string)fromValue, toType));
}
if (toType == typeof(string))
{
return(o => TypeSerializer.SerializeToString(o).StripQuotes());
}
var underlyingToType = Nullable.GetUnderlyingType(toType) ?? toType;
var underlyingFromType = Nullable.GetUnderlyingType(fromType) ?? fromType;
if (underlyingToType.IsEnum)
{
if (underlyingFromType.IsEnum || fromType == typeof(string))
{
return(fromValue => Enum.Parse(underlyingToType, fromValue.ToString(), ignoreCase: true));
}
if (underlyingFromType.IsIntegerType())
{
return(fromValue => Enum.ToObject(underlyingToType, fromValue));
}
}
else if (underlyingFromType.IsEnum)
{
if (underlyingToType.IsIntegerType())
{
return(fromValue => Convert.ChangeType(fromValue, underlyingToType, null));
}
}
else if (typeof(IEnumerable).IsAssignableFrom(fromType) && underlyingToType != typeof(string))
{
return(fromValue => AutoMappingUtils.TryConvertCollections(fromType, underlyingToType, fromValue));
}
else if (underlyingToType.IsValueType)
{
return(fromValue => AutoMappingUtils.ChangeValueType(fromValue, underlyingToType));
}
else
{
return(fromValue =>
{
if (fromValue == null)
{
return fromValue;
}
if (toType == typeof(string))
{
return fromValue.ToJsv();
}
var toValue = toType.CreateInstance();
toValue.PopulateWith(fromValue);
return toValue;
});
}
return(null);
}
