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//
// DateTimeOffsetConverter.cs
//
// Author:
// Carlos Alberto Cortez (calberto.cortez@gmail.com)
//
// Copyright (C) 2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_4_0
using System;
using System.Globalization;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
namespace System.ComponentModel
{
public class DateTimeOffsetConverter : TypeConverter
{
static readonly string OffsetPattern = "K";
static readonly string InvariantDatePattern = "yyyy-MM-dd";
public DateTimeOffsetConverter ()
{
}
public override bool CanConvertFrom (ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
return true;
return base.CanConvertFrom (context, sourceType);
}
public override bool CanConvertTo (ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof (string) || destinationType == typeof (InstanceDescriptor))
return true;
return base.CanConvertTo (context, destinationType);
}
public override object ConvertFrom (ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string) {
string s = ((string) value).Trim ();
if (s.Length == 0)
return DateTimeOffset.MinValue;
DateTimeOffset retval;
if (culture == null) {
if (DateTimeOffset.TryParse (s, out retval))
return retval;
} else {
DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
if (DateTimeOffset.TryParse (s, info, DateTimeStyles.None, out retval))
return retval;
}
throw new FormatException (s + " is not a valid DateTimeOffset value.");
}
return base.ConvertFrom (context, culture, value);
}
public override object ConvertTo (ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (value is DateTimeOffset) {
DateTimeOffset dt_offset = (DateTimeOffset) value;
if (destinationType == typeof (string)) {
if (dt_offset == DateTimeOffset.MinValue)
return String.Empty;
if (culture == null)
culture = CultureInfo.CurrentCulture;
// InvariantCulture gets special handling.
if (culture == CultureInfo.InvariantCulture) {
if (dt_offset.DateTime == dt_offset.Date)
return dt_offset.ToString (InvariantDatePattern + " " + OffsetPattern);
return dt_offset.ToString (culture);
}
DateTimeFormatInfo info = (DateTimeFormatInfo) culture.GetFormat (typeof (DateTimeFormatInfo));
if (dt_offset.DateTime == dt_offset.Date)
return dt_offset.ToString (info.ShortDatePattern + " " + OffsetPattern);
// No need to pass CultureInfo, as we already consumed the proper patterns.
return dt_offset.ToString (info.ShortDatePattern + " " + info.ShortTimePattern + " " + OffsetPattern, null);
}
if (destinationType == typeof (InstanceDescriptor)) {
ConstructorInfo ctor = typeof (DateTimeOffset).GetConstructor ( GetDateTimeOffsetArgumentTypes ());
object [] ctor_args = new object [] { dt_offset.Year, dt_offset.Month, dt_offset.Day,
dt_offset.Hour, dt_offset.Minute, dt_offset.Second, dt_offset.Millisecond,
dt_offset.Offset };
return new InstanceDescriptor (ctor, ctor_args);
}
}
return base.ConvertTo (context, culture, value, destinationType);
}
static Type [] ctor_argument_types;
static Type [] GetDateTimeOffsetArgumentTypes ()
{
if (ctor_argument_types == null) {
Type int_type = typeof (int);
ctor_argument_types = new Type [] { int_type, int_type, int_type, int_type, int_type, int_type, int_type,
typeof (TimeSpan) };
}
return ctor_argument_types;
}
}
}
#endif
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