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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics.Contracts;
using System.Runtime.Serialization;
namespace System
{
public sealed partial class TimeZoneInfo
{
[Serializable]
public struct TransitionTime : IEquatable<TransitionTime>, ISerializable, IDeserializationCallback
{
private readonly DateTime _timeOfDay;
private readonly byte _month;
private readonly byte _week;
private readonly byte _day;
private readonly DayOfWeek _dayOfWeek;
private readonly bool _isFixedDateRule;
public DateTime TimeOfDay => _timeOfDay;
public int Month => _month;
public int Week => _week;
public int Day => _day;
public DayOfWeek DayOfWeek => _dayOfWeek;
public bool IsFixedDateRule => _isFixedDateRule;
[Pure]
public override bool Equals(object obj) =>
obj is TransitionTime && Equals((TransitionTime)obj);
public static bool operator ==(TransitionTime t1, TransitionTime t2) => t1.Equals(t2);
public static bool operator !=(TransitionTime t1, TransitionTime t2) => !t1.Equals(t2);
[Pure]
public bool Equals(TransitionTime other) =>
_isFixedDateRule == other._isFixedDateRule &&
_timeOfDay == other._timeOfDay &&
_month == other._month &&
(other._isFixedDateRule ?
_day == other._day :
_week == other._week && _dayOfWeek == other._dayOfWeek);
public override int GetHashCode() => (int)_month ^ (int)_week << 8;
private TransitionTime(DateTime timeOfDay, int month, int week, int day, DayOfWeek dayOfWeek, bool isFixedDateRule)
{
ValidateTransitionTime(timeOfDay, month, week, day, dayOfWeek);
_timeOfDay = timeOfDay;
_month = (byte)month;
_week = (byte)week;
_day = (byte)day;
_dayOfWeek = dayOfWeek;
_isFixedDateRule = isFixedDateRule;
}
public static TransitionTime CreateFixedDateRule(DateTime timeOfDay, int month, int day) =>
new TransitionTime(timeOfDay, month, 1, day, DayOfWeek.Sunday, isFixedDateRule: true);
public static TransitionTime CreateFloatingDateRule(DateTime timeOfDay, int month, int week, DayOfWeek dayOfWeek) =>
new TransitionTime(timeOfDay, month, week, 1, dayOfWeek, isFixedDateRule: false);
/// <summary>
/// Helper function that validates a TransitionTime instance.
/// </summary>
private static void ValidateTransitionTime(DateTime timeOfDay, int month, int week, int day, DayOfWeek dayOfWeek)
{
if (timeOfDay.Kind != DateTimeKind.Unspecified)
{
throw new ArgumentException(SR.Argument_DateTimeKindMustBeUnspecified, nameof(timeOfDay));
}
// Month range 1-12
if (month < 1 || month > 12)
{
throw new ArgumentOutOfRangeException(nameof(month), SR.ArgumentOutOfRange_MonthParam);
}
// Day range 1-31
if (day < 1 || day > 31)
{
throw new ArgumentOutOfRangeException(nameof(day), SR.ArgumentOutOfRange_DayParam);
}
// Week range 1-5
if (week < 1 || week > 5)
{
throw new ArgumentOutOfRangeException(nameof(week), SR.ArgumentOutOfRange_Week);
}
// DayOfWeek range 0-6
if ((int)dayOfWeek < 0 || (int)dayOfWeek > 6)
{
throw new ArgumentOutOfRangeException(nameof(dayOfWeek), SR.ArgumentOutOfRange_DayOfWeek);
}
Contract.EndContractBlock();
if (timeOfDay.Year != 1 || timeOfDay.Month != 1 || timeOfDay.Day != 1 || (timeOfDay.Ticks % TimeSpan.TicksPerMillisecond != 0))
{
throw new ArgumentException(SR.Argument_DateTimeHasTicks, nameof(timeOfDay));
}
}
void IDeserializationCallback.OnDeserialization(object sender)
{
// OnDeserialization is called after each instance of this class is deserialized.
// This callback method performs TransitionTime validation after being deserialized.
try
{
ValidateTransitionTime(_timeOfDay, _month, _week, _day, _dayOfWeek);
}
catch (ArgumentException e)
{
throw new SerializationException(SR.Serialization_InvalidData, e);
}
}
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
Contract.EndContractBlock();
info.AddValue("TimeOfDay", _timeOfDay); // Do not rename (binary serialization)
info.AddValue("Month", _month); // Do not rename (binary serialization)
info.AddValue("Week", _week); // Do not rename (binary serialization)
info.AddValue("Day", _day); // Do not rename (binary serialization)
info.AddValue("DayOfWeek", _dayOfWeek); // Do not rename (binary serialization)
info.AddValue("IsFixedDateRule", _isFixedDateRule); // Do not rename (binary serialization)
}
private TransitionTime(SerializationInfo info, StreamingContext context)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
_timeOfDay = (DateTime)info.GetValue("TimeOfDay", typeof(DateTime)); // Do not rename (binary serialization)
_month = (byte)info.GetValue("Month", typeof(byte)); // Do not rename (binary serialization)
_week = (byte)info.GetValue("Week", typeof(byte)); // Do not rename (binary serialization)
_day = (byte)info.GetValue("Day", typeof(byte)); // Do not rename (binary serialization)
_dayOfWeek = (DayOfWeek)info.GetValue("DayOfWeek", typeof(DayOfWeek)); // Do not rename (binary serialization)
_isFixedDateRule = (bool)info.GetValue("IsFixedDateRule", typeof(bool)); // Do not rename (binary serialization)
}
}
}
}
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