/// <summary>
/// Creates the appropriate ScheduleBase implementation from the specified cron expression.
/// </summary>
/// <param name="cronExpression">Cron expression to convert into a class.</param>
/// <returns>Correct implementation of ScheduleBase to honor the expression.</returns>
public static ScheduleBase FromCronExpression(string cronExpression)
{
if (string.IsNullOrEmpty(cronExpression))
{
throw new ArgumentException("Cannot have a null or empty cron expression.", "cronExpression");
}
var trimmedCronExpression = cronExpression.Trim();
var cronExpressionItems = trimmedCronExpression.Split(' ');
if (cronExpressionItems.Length != 5)
{
throw new ArgumentException("Incorrect number of values in the cron expression.", "cronExpression");
}
// probably should do this with regex but my regex is so bad...
if (cronExpressionItems.All(_ => _ == "*"))
{
var ret = new IntervalSchedule { Interval = TimeSpan.FromMinutes(1) };
return ret;
}
else if (cronExpressionItems.First().Contains("/"))
{
var minuteString = cronExpressionItems.First();
var minuteItems = minuteString.Split('/');
if (minuteItems[0] != "*")
{
throw new ArgumentException("Invalid interval format, should be '*/[interval minutes]', not '" + minuteString + "'");
}
var intervalMinutesString = minuteItems[1];
var intervalMinutesInt = int.Parse(intervalMinutesString);
var intervalMinutesTimeSpan = TimeSpan.FromMinutes(intervalMinutesInt);
var ret = new IntervalSchedule { Interval = intervalMinutesTimeSpan };
return ret;
}
else if (cronExpressionItems.First().IsNumeric() && cronExpressionItems.Skip(1).All(_ => _ == "*"))
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString);
var ret = new HourlySchedule { Minute = minute };
return ret;
}
else if (cronExpressionItems.First().IsNumeric() && cronExpressionItems.Second().IsNumeric() && cronExpressionItems.Skip(2).All(_ => _ == "*"))
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString);
var ret = new DailyScheduleInUtc { Hour = hour, Minute = minute };
return ret;
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third() == "*" &&
cronExpressionItems.Fourth() == "*" &&
cronExpressionItems.Fifth().IsNumeric())
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString);
var daysOfWeekString = cronExpressionItems.Fifth();
var daysOfWeek = daysOfWeekString.Split(',').Select(int.Parse).Cast<DayOfWeek>().ToArray();
var ret = new WeeklyScheduleInUtc { Hour = hour, Minute = minute, DaysOfWeek = daysOfWeek };
return ret;
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third().IsNumeric() &&
cronExpressionItems.Fourth() == "*" &&
cronExpressionItems.Fifth() == "*")
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString);
var daysOfMonthString = cronExpressionItems.Third();
var daysOfMonthInt = daysOfMonthString.Split(',').Select(int.Parse).ToArray();
var ret = new MonthlyScheduleInUtc { Hour = hour, Minute = minute, DaysOfMonth = daysOfMonthInt };
return ret;
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third().IsNumeric() &&
cronExpressionItems.Fourth().IsNumeric() &&
cronExpressionItems.Fifth() == "*")
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString);
var daysOfMonthString = cronExpressionItems.Third();
var daysOfMonthInt = daysOfMonthString.Split(',').Select(int.Parse).ToArray();
var monthsOfYearString = cronExpressionItems.Fourth();
var monthsOfYear = monthsOfYearString.Split(',').Select(int.Parse).Cast<MonthOfYear>().ToArray();
var ret = new YearlyScheduleInUtc { Hour = hour, Minute = minute, DaysOfMonth = daysOfMonthInt, MonthsOfYear = monthsOfYear };
return ret;
}
else
{
throw new NotSupportedException("Expression is not supported for translation: " + cronExpression);
}
}
public static ScheduleBase FromCronExpression(string cronExpression)
{
if (string.IsNullOrEmpty(cronExpression))
{
throw new ArgumentException("Cannot have a null or empty cron expression.", "cronExpression");
}
var trimmedCronExpression = cronExpression.Trim();
var cronExpressionItems = trimmedCronExpression.Split(' ');
if (cronExpressionItems.Length != 5)
{
throw new ArgumentException("Incorrect number of values in the cron expression.", "cronExpression");
}
// probably should do this with regex but my regex is so bad...
if (cronExpressionItems.All(_ => _ == "*"))
{
var ret = new IntervalSchedule {
Interval = TimeSpan.FromMinutes(1)
};
return(ret);
}
else if (cronExpressionItems.First().Contains("/"))
{
var minuteString = cronExpressionItems.First();
var minuteItems = minuteString.Split('/');
if (minuteItems[0] != "*")
{
throw new ArgumentException("Invalid interval format, should be '*/[interval minutes]', not '" + minuteString + "'");
}
var intervalMinutesString = minuteItems[1];
var intervalMinutesInt = int.Parse(intervalMinutesString, CultureInfo.InvariantCulture);
var intervalMinutesTimeSpan = TimeSpan.FromMinutes(intervalMinutesInt);
var ret = new IntervalSchedule {
Interval = intervalMinutesTimeSpan
};
return(ret);
}
else if (cronExpressionItems.First().IsNumeric() && cronExpressionItems.Skip(1).All(_ => _ == "*"))
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString, CultureInfo.InvariantCulture);
var ret = new HourlySchedule {
Minute = minute
};
return(ret);
}
else if (cronExpressionItems.First().IsNumeric() && cronExpressionItems.Second().IsNumeric() && cronExpressionItems.Skip(2).All(_ => _ == "*"))
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString, CultureInfo.InvariantCulture);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString, CultureInfo.InvariantCulture);
var ret = new DailyScheduleInUtc {
Hour = hour, Minute = minute
};
return(ret);
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third() == "*" &&
cronExpressionItems.Fourth() == "*" &&
cronExpressionItems.Fifth().IsNumeric())
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString, CultureInfo.InvariantCulture);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString, CultureInfo.InvariantCulture);
var daysOfWeekString = cronExpressionItems.Fifth();
var daysOfWeek = daysOfWeekString.Split(',').Select(int.Parse).Cast <DayOfWeek>().ToArray();
var ret = new WeeklyScheduleInUtc {
Hour = hour, Minute = minute, DaysOfWeek = daysOfWeek
};
return(ret);
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third().IsNumeric() &&
cronExpressionItems.Fourth() == "*" &&
cronExpressionItems.Fifth() == "*")
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString, CultureInfo.InvariantCulture);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString, CultureInfo.InvariantCulture);
var daysOfMonthString = cronExpressionItems.Third();
var daysOfMonthInt = daysOfMonthString.Split(',').Select(int.Parse).ToArray();
var ret = new MonthlyScheduleInUtc {
Hour = hour, Minute = minute, DaysOfMonth = daysOfMonthInt
};
return(ret);
}
else if (
cronExpressionItems.First().IsNumeric() &&
cronExpressionItems.Second().IsNumeric() &&
cronExpressionItems.Third().IsNumeric() &&
cronExpressionItems.Fourth().IsNumeric() &&
cronExpressionItems.Fifth() == "*")
{
var minuteString = cronExpressionItems.First();
var minute = int.Parse(minuteString, CultureInfo.InvariantCulture);
var hourString = cronExpressionItems.Second();
var hour = int.Parse(hourString, CultureInfo.InvariantCulture);
var daysOfMonthString = cronExpressionItems.Third();
var daysOfMonthInt = daysOfMonthString.Split(',').Select(int.Parse).ToArray();
var monthsOfYearString = cronExpressionItems.Fourth();
var monthsOfYear = monthsOfYearString.Split(',').Select(int.Parse).Cast <MonthOfYear>().ToArray();
var ret = new YearlyScheduleInUtc {
Hour = hour, Minute = minute, DaysOfMonth = daysOfMonthInt, MonthsOfYear = monthsOfYear
};
return(ret);
}
else
{
throw new NotSupportedException("Expression is not supported for translation: " + cronExpression);
}
}
