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IsoDateTimeConverter.cs
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IsoDateTimeConverter.cs
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#region License
// Copyright (c) 2007 James Newton-King
//
// 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.
#endregion
using System;
using System.Globalization;
using Newtonsoft.Json.Utilities;
namespace Newtonsoft.Json.Converters
{
/// <summary>
/// Converts a <see cref="DateTime"/> to and from the ISO 8601 date format (e.g. <c>"2008-04-12T12:53Z"</c>).
/// </summary>
public class IsoDateTimeConverter : DateTimeConverterBase
{
private const string DefaultDateTimeFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss.FFFFFFFK";
private DateTimeStyles _dateTimeStyles = DateTimeStyles.RoundtripKind;
private string _dateTimeFormat;
private CultureInfo _culture;
/// <summary>
/// Gets or sets the date time styles used when converting a date to and from JSON.
/// </summary>
/// <value>The date time styles used when converting a date to and from JSON.</value>
public DateTimeStyles DateTimeStyles
{
get { return _dateTimeStyles; }
set { _dateTimeStyles = value; }
}
/// <summary>
/// Gets or sets the date time format used when converting a date to and from JSON.
/// </summary>
/// <value>The date time format used when converting a date to and from JSON.</value>
public string DateTimeFormat
{
get { return _dateTimeFormat ?? string.Empty; }
set { _dateTimeFormat = (string.IsNullOrEmpty(value)) ? null : value; }
}
/// <summary>
/// Gets or sets the culture used when converting a date to and from JSON.
/// </summary>
/// <value>The culture used when converting a date to and from JSON.</value>
public CultureInfo Culture
{
get { return _culture ?? CultureInfo.CurrentCulture; }
set { _culture = value; }
}
/// <summary>
/// Writes the JSON representation of the object.
/// </summary>
/// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
/// <param name="value">The value.</param>
/// <param name="serializer">The calling serializer.</param>
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
string text;
if (value is DateTime)
{
DateTime dateTime = (DateTime)value;
if ((_dateTimeStyles & DateTimeStyles.AdjustToUniversal) == DateTimeStyles.AdjustToUniversal
|| (_dateTimeStyles & DateTimeStyles.AssumeUniversal) == DateTimeStyles.AssumeUniversal)
{
dateTime = dateTime.ToUniversalTime();
}
text = dateTime.ToString(_dateTimeFormat ?? DefaultDateTimeFormat, Culture);
}
#if HAVE_DATE_TIME_OFFSET
else if (value is DateTimeOffset)
{
DateTimeOffset dateTimeOffset = (DateTimeOffset)value;
if ((_dateTimeStyles & DateTimeStyles.AdjustToUniversal) == DateTimeStyles.AdjustToUniversal
|| (_dateTimeStyles & DateTimeStyles.AssumeUniversal) == DateTimeStyles.AssumeUniversal)
{
dateTimeOffset = dateTimeOffset.ToUniversalTime();
}
text = dateTimeOffset.ToString(_dateTimeFormat ?? DefaultDateTimeFormat, Culture);
}
#endif
else
{
throw new JsonSerializationException("Unexpected value when converting date. Expected DateTime or DateTimeOffset, got {0}.".FormatWith(CultureInfo.InvariantCulture, ReflectionUtils.GetObjectType(value)));
}
writer.WriteValue(text);
}
/// <summary>
/// Reads the JSON representation of the object.
/// </summary>
/// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
/// <param name="objectType">Type of the object.</param>
/// <param name="existingValue">The existing value of object being read.</param>
/// <param name="serializer">The calling serializer.</param>
/// <returns>The object value.</returns>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
bool nullable = ReflectionUtils.IsNullableType(objectType);
if (reader.TokenType == JsonToken.Null)
{
if (!ReflectionUtils.IsNullableType(objectType))
{
throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType));
}
return null;
}
#if HAVE_DATE_TIME_OFFSET
Type t = (nullable)
? Nullable.GetUnderlyingType(objectType)
: objectType;
#endif
if (reader.TokenType == JsonToken.Date)
{
#if HAVE_DATE_TIME_OFFSET
if (t == typeof(DateTimeOffset))
{
return (reader.Value is DateTimeOffset) ? reader.Value : new DateTimeOffset((DateTime)reader.Value);
}
// converter is expected to return a DateTime
if (reader.Value is DateTimeOffset)
{
return ((DateTimeOffset)reader.Value).DateTime;
}
#endif
return reader.Value;
}
if (reader.TokenType != JsonToken.String)
{
throw JsonSerializationException.Create(reader, "Unexpected token parsing date. Expected String, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
}
string dateText = reader.Value.ToString();
if (string.IsNullOrEmpty(dateText) && nullable)
{
return null;
}
#if HAVE_DATE_TIME_OFFSET
if (t == typeof(DateTimeOffset))
{
if (!string.IsNullOrEmpty(_dateTimeFormat))
{
return DateTimeOffset.ParseExact(dateText, _dateTimeFormat, Culture, _dateTimeStyles);
}
else
{
return DateTimeOffset.Parse(dateText, Culture, _dateTimeStyles);
}
}
#endif
if (!string.IsNullOrEmpty(_dateTimeFormat))
{
return DateTime.ParseExact(dateText, _dateTimeFormat, Culture, _dateTimeStyles);
}
else
{
return DateTime.Parse(dateText, Culture, _dateTimeStyles);
}
}
}
}