private CrontabSchedule(
CrontabField minutes, CrontabField hours,
CrontabField days, CrontabField months,
CrontabField daysOfWeek)
{
Debug.Assert(minutes != null);
Debug.Assert(hours != null);
Debug.Assert(days != null);
Debug.Assert(months != null);
Debug.Assert(daysOfWeek != null);
_minutes = minutes;
_hours = hours;
_days = days;
_months = months;
_daysOfWeek = daysOfWeek;
}
private static ValueOrError<CrontabSchedule> TryParse(string expression, ExceptionHandler onError)
{
if (expression == null)
throw new ArgumentNullException("expression");
var tokens = expression.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length != 5)
{
return ErrorHandling.OnError(() => new CrontabException(string.Format(
"'{0}' is not a valid crontab expression. It must contain at least 5 components of a schedule "
+ "(in the sequence of minutes, hours, days, months, days of week).",
expression)), onError);
}
var fields = new CrontabField[5];
for (var i = 0; i < fields.Length; i++)
{
var field = CrontabField.TryParse((CrontabFieldKind)i, tokens[i], onError);
if (field.IsError)
return field.ErrorProvider;
fields[i] = field.Value;
}
return new CrontabSchedule(fields[0], fields[1], fields[2], fields[3], fields[4]);
}
public static ValueOrError<CrontabField> TryParse(CrontabFieldKind kind, string expression, ExceptionHandler onError)
{
var field = new CrontabField(CrontabFieldImpl.FromKind(kind));
var error = field._impl.TryParse(expression, field.Accumulate, onError);
return error == null ? field : (ValueOrError<CrontabField>)error;
}
