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namespace System.Web.Mvc {
using System;
using System.ComponentModel.DataAnnotations;
internal static class DataTypeUtil {
internal static readonly string CurrencyTypeName = DataType.Currency.ToString();
internal static readonly string DateTypeName = DataType.Date.ToString();
internal static readonly string DateTimeTypeName = DataType.DateTime.ToString();
internal static readonly string DurationTypeName = DataType.Duration.ToString();
internal static readonly string EmailAddressTypeName = DataType.EmailAddress.ToString();
internal static readonly string HtmlTypeName = DataType.Html.ToString();
internal static readonly string ImageUrlTypeName = DataType.ImageUrl.ToString();
internal static readonly string MultiLineTextTypeName = DataType.MultilineText.ToString();
internal static readonly string PasswordTypeName = DataType.Password.ToString();
internal static readonly string PhoneNumberTypeName = DataType.PhoneNumber.ToString();
internal static readonly string TextTypeName = DataType.Text.ToString();
internal static readonly string TimeTypeName = DataType.Time.ToString();
internal static readonly string UrlTypeName = DataType.Url.ToString();
// This is a faster version of GetDataTypeName(). It internally calls ToString() on the enum
// value, which can be quite slow because of value verification.
internal static string ToDataTypeName(this DataTypeAttribute attribute, Func<DataTypeAttribute, Boolean> isDataType = null) {
if (isDataType == null) {
isDataType = t => t.GetType().Equals(typeof(DataTypeAttribute));
}
// GetDataTypeName is virtual, so this is only safe if they haven't derived from DataTypeAttribute.
// However, if they derive from DataTypeAttribute, they can help their own perf by overriding GetDataTypeName
// and returning an appropriate string without invoking the ToString() on the enum.
if (isDataType(attribute)) {
switch (attribute.DataType) {
case DataType.Currency:
return CurrencyTypeName;
case DataType.Date:
return DateTypeName;
case DataType.DateTime:
return DateTimeTypeName;
case DataType.Duration:
return DurationTypeName;
case DataType.EmailAddress:
return EmailAddressTypeName;
case DataType.Html:
return HtmlTypeName;
case DataType.ImageUrl:
return ImageUrlTypeName;
case DataType.MultilineText:
return MultiLineTextTypeName;
case DataType.Password:
return PasswordTypeName;
case DataType.PhoneNumber:
return PhoneNumberTypeName;
case DataType.Text:
return TextTypeName;
case DataType.Time:
return TimeTypeName;
case DataType.Url:
return UrlTypeName;
}
}
return attribute.GetDataTypeName();
}
}
}
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