static public bool TryParse(string s, out Expression result)
{
result = default(Expression);
if (string.IsNullOrEmpty(s))
{
return(false);
}
string[] parts = s.Split(' ');
if (parts.Length != 5L)
{
return(false);
}
ExpressionSectionBase minuteSection;
ExpressionSectionBase hourSection;
ExpressionSectionBase dayOfMonthSection;
ExpressionSectionBase monthSection;
ExpressionSectionBase dayOfWeekSection;
if (!ExpressionSectionBase.TryParse(parts[0],
ExpressionSectionType.Minute,
out minuteSection))
{
return(false);
}
if (!ExpressionSectionBase.TryParse(parts[1],
ExpressionSectionType.Hour,
out hourSection))
{
return(false);
}
if (!ExpressionSectionBase.TryParse(parts[2],
ExpressionSectionType.DayOfMonth,
out dayOfMonthSection))
{
return(false);
}
if (!ExpressionSectionBase.TryParse(parts[3],
ExpressionSectionType.Month,
out monthSection))
{
return(false);
}
if (!ExpressionSectionBase.TryParse(parts[4],
ExpressionSectionType.DayOfWeek,
out dayOfWeekSection))
{
return(false);
}
if (DaySectionsConflict(dayOfWeekSection, dayOfMonthSection))
{
return(false);
}
result = new Expression(minuteSection, hourSection, dayOfMonthSection, monthSection, dayOfWeekSection);
return(true);
}
static private bool DaySectionsConflict(ExpressionSectionBase dayOfWeek, ExpressionSectionBase dayOfMonth)
{
if (dayOfWeek is IgnoreExpressionSection)
{
return(dayOfMonth is IgnoreExpressionSection);
}
if (dayOfMonth is IgnoreExpressionSection)
{
return(dayOfWeek is IgnoreExpressionSection);
}
return(!(dayOfWeek is EveryOccurenceExpressionSection && dayOfMonth is EveryOccurenceExpressionSection));
}
private Expression(ExpressionSectionBase minuteSection,
ExpressionSectionBase hourSection,
ExpressionSectionBase dayOfMonthSection,
ExpressionSectionBase monthSection,
ExpressionSectionBase dayOfWeekSection
)
{
if (minuteSection.Type != ExpressionSectionType.Minute ||
hourSection.Type != ExpressionSectionType.Hour ||
dayOfMonthSection.Type != ExpressionSectionType.DayOfMonth ||
dayOfWeekSection.Type != ExpressionSectionType.DayOfWeek ||
monthSection.Type != ExpressionSectionType.Month)
{
throw new ArgumentException("Invalid constructor call.");
}
_minuteSection = minuteSection;
_hourSection = hourSection;
_dayOfMonthSection = dayOfMonthSection;
_monthSection = monthSection;
_dayOfWeekSection = dayOfWeekSection;
}
private Expression(ExpressionSectionBase minuteSection,
ExpressionSectionBase hourSection,
ExpressionSectionBase dayOfMonthSection,
ExpressionSectionBase monthSection,
ExpressionSectionBase dayOfWeekSection
)
{
if (minuteSection.Type != ExpressionSectionType.Minute
|| hourSection.Type != ExpressionSectionType.Hour
|| dayOfMonthSection.Type != ExpressionSectionType.DayOfMonth
|| dayOfWeekSection.Type != ExpressionSectionType.DayOfWeek
|| monthSection.Type != ExpressionSectionType.Month)
{
throw new ArgumentException("Invalid constructor call.");
}
_minuteSection = minuteSection;
_hourSection = hourSection;
_dayOfMonthSection = dayOfMonthSection;
_monthSection = monthSection;
_dayOfWeekSection = dayOfWeekSection;
}
static public bool TryParse(string s, ExpressionSectionType type, out ExpressionSectionBase result)
{
result = default(ExpressionSectionBase);
if (string.IsNullOrEmpty(s)) return false;
EveryOccurenceExpressionSection every;
if (EveryOccurenceExpressionSection.TryParse(s, type, out every))
{
result = every;
return true;
}
IgnoreExpressionSection ignore;
if (IgnoreExpressionSection.TryParse(s, type, out ignore))
{
if (type != ExpressionSectionType.DayOfMonth && type != ExpressionSectionType.DayOfWeek) return false;
result = ignore;
return true;
}
RangeExpressionSection range;
if (RangeExpressionSection.TryParse(s, type, out range))
{
result = range;
return true;
}
RepeatingExpressionSection repeating;
if (RepeatingExpressionSection.TryParse(s, type, out repeating))
{
result = repeating;
return true;
}
ListExpressionSection list;
if (ListExpressionSection.TryParse(s, type, out list))
{
result = list;
return true;
}
switch (type)
{
case ExpressionSectionType.Month:
MonthExpressionSection month;
if (!MonthExpressionSection.TryParse(s, out month)) return false;
result = month;
return true;
case ExpressionSectionType.DayOfWeek:
DayOfWeekExpressionSection dayOfWeek;
if (DayOfWeekExpressionSection.TryParse(s, out dayOfWeek))
{
result = dayOfWeek;
return true;
}
SpecifiedWeekAndWeekDayExpressionSection specifiedDayAndWeekDay;
if (SpecifiedWeekAndWeekDayExpressionSection.TryParse(s, out specifiedDayAndWeekDay))
{
result = specifiedDayAndWeekDay;
return true;
}
goto default;
case ExpressionSectionType.DayOfMonth:
LastDayOfMonthExpressionSection lastDayOfMonth;
if (LastDayOfMonthExpressionSection.TryParse(s, out lastDayOfMonth))
{
result = lastDayOfMonth;
return true;
}
NearestWeekdayExpressionSection nearestWeekDay;
if (NearestWeekdayExpressionSection.TryParse(s, out nearestWeekDay))
{
result = nearestWeekDay;
return true;
}
LastWeekDayOfMonthExpressionSection lastWeekDay;
if (LastWeekDayOfMonthExpressionSection.TryParse(s, out lastWeekDay))
{
result = lastWeekDay;
return true;
}
goto default;
default:
SimpleExpressionSection simple;
if (!SimpleExpressionSection.TryParse(s, type, out simple)) return false;
result = simple;
return true;
}
}
static public bool TryParse(string s, ExpressionSectionType type, out ExpressionSectionBase result)
{
result = default(ExpressionSectionBase);
if (string.IsNullOrEmpty(s))
{
return(false);
}
EveryOccurenceExpressionSection every;
if (EveryOccurenceExpressionSection.TryParse(s, type, out every))
{
result = every;
return(true);
}
IgnoreExpressionSection ignore;
if (IgnoreExpressionSection.TryParse(s, type, out ignore))
{
if (type != ExpressionSectionType.DayOfMonth && type != ExpressionSectionType.DayOfWeek)
{
return(false);
}
result = ignore;
return(true);
}
RangeExpressionSection range;
if (RangeExpressionSection.TryParse(s, type, out range))
{
result = range;
return(true);
}
RepeatingExpressionSection repeating;
if (RepeatingExpressionSection.TryParse(s, type, out repeating))
{
result = repeating;
return(true);
}
ListExpressionSection list;
if (ListExpressionSection.TryParse(s, type, out list))
{
result = list;
return(true);
}
switch (type)
{
case ExpressionSectionType.Month:
MonthExpressionSection month;
if (!MonthExpressionSection.TryParse(s, out month))
{
return(false);
}
result = month;
return(true);
case ExpressionSectionType.DayOfWeek:
DayOfWeekExpressionSection dayOfWeek;
if (DayOfWeekExpressionSection.TryParse(s, out dayOfWeek))
{
result = dayOfWeek;
return(true);
}
SpecifiedWeekAndWeekDayExpressionSection specifiedDayAndWeekDay;
if (SpecifiedWeekAndWeekDayExpressionSection.TryParse(s, out specifiedDayAndWeekDay))
{
result = specifiedDayAndWeekDay;
return(true);
}
goto default;
case ExpressionSectionType.DayOfMonth:
LastDayOfMonthExpressionSection lastDayOfMonth;
if (LastDayOfMonthExpressionSection.TryParse(s, out lastDayOfMonth))
{
result = lastDayOfMonth;
return(true);
}
NearestWeekdayExpressionSection nearestWeekDay;
if (NearestWeekdayExpressionSection.TryParse(s, out nearestWeekDay))
{
result = nearestWeekDay;
return(true);
}
LastWeekDayOfMonthExpressionSection lastWeekDay;
if (LastWeekDayOfMonthExpressionSection.TryParse(s, out lastWeekDay))
{
result = lastWeekDay;
return(true);
}
goto default;
default:
SimpleExpressionSection simple;
if (!SimpleExpressionSection.TryParse(s, type, out simple))
{
return(false);
}
result = simple;
return(true);
}
}
static private bool DaySectionsConflict(ExpressionSectionBase dayOfWeek, ExpressionSectionBase dayOfMonth)
{
if (dayOfWeek is IgnoreExpressionSection) return dayOfMonth is IgnoreExpressionSection;
if (dayOfMonth is IgnoreExpressionSection) return dayOfWeek is IgnoreExpressionSection;
return !(dayOfWeek is EveryOccurenceExpressionSection && dayOfMonth is EveryOccurenceExpressionSection);
}
