/src/Quartz/CronExpression.cs
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Possible License(s): GPL-2.0
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- #region License
- /*
- * All content copyright Marko Lahma, unless otherwise indicated. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy
- * of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- */
- #endregion
- using System;
- using System.Collections.Generic;
- using System.Globalization;
- using System.Linq;
- using System.Runtime.Serialization;
- using System.Text;
- using System.Text.RegularExpressions;
- using Quartz.Util;
- namespace Quartz
- {
- /// <summary>
- /// Provides a parser and evaluator for unix-like cron expressions. Cron
- /// expressions provide the ability to specify complex time combinations such as
- /// "At 8:00am every Monday through Friday" or "At 1:30am every
- /// last Friday of the month".
- /// </summary>
- /// <remarks>
- /// <para>
- /// Cron expressions are comprised of 6 required fields and one optional field
- /// separated by white space. The fields respectively are described as follows:
- /// </para>
- /// <table cellspacing="8">
- /// <tr>
- /// <th align="left">Field Name</th>
- /// <th align="left"> </th>
- /// <th align="left">Allowed Values</th>
- /// <th align="left"> </th>
- /// <th align="left">Allowed Special Characters</th>
- /// </tr>
- /// <tr>
- /// <td align="left">Seconds</td>
- /// <td align="left"> </td>
- /// <td align="left">0-59</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// /</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Minutes</td>
- /// <td align="left"> </td>
- /// <td align="left">0-59</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// /</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Hours</td>
- /// <td align="left"> </td>
- /// <td align="left">0-23</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// /</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Day-of-month</td>
- /// <td align="left"> </td>
- /// <td align="left">1-31</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// ? / L W C</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Month</td>
- /// <td align="left"> </td>
- /// <td align="left">1-12 or JAN-DEC</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// /</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Day-of-Week</td>
- /// <td align="left"> </td>
- /// <td align="left">1-7 or SUN-SAT</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// ? / L #</td>
- /// </tr>
- /// <tr>
- /// <td align="left">Year (Optional)</td>
- /// <td align="left"> </td>
- /// <td align="left">empty, 1970-2199</td>
- /// <td align="left"> </td>
- /// <td align="left">, - /// /</td>
- /// </tr>
- /// </table>
- /// <para>
- /// The '*' character is used to specify all values. For example, "*"
- /// in the minute field means "every minute".
- /// </para>
- /// <para>
- /// The '?' character is allowed for the day-of-month and day-of-week fields. It
- /// is used to specify 'no specific value'. This is useful when you need to
- /// specify something in one of the two fields, but not the other.
- /// </para>
- /// <para>
- /// The '-' character is used to specify ranges For example "10-12" in
- /// the hour field means "the hours 10, 11 and 12".
- /// </para>
- /// <para>
- /// The ',' character is used to specify additional values. For example
- /// "MON,WED,FRI" in the day-of-week field means "the days Monday,
- /// Wednesday, and Friday".
- /// </para>
- /// <para>
- /// The '/' character is used to specify increments. For example "0/15"
- /// in the seconds field means "the seconds 0, 15, 30, and 45". And
- /// "5/15" in the seconds field means "the seconds 5, 20, 35, and
- /// 50". Specifying '*' before the '/' is equivalent to specifying 0 is
- /// the value to start with. Essentially, for each field in the expression, there
- /// is a set of numbers that can be turned on or off. For seconds and minutes,
- /// the numbers range from 0 to 59. For hours 0 to 23, for days of the month 0 to
- /// 31, and for months 1 to 12. The "/" character simply helps you turn
- /// on every "nth" value in the given set. Thus "7/6" in the
- /// month field only turns on month "7", it does NOT mean every 6th
- /// month, please note that subtlety.
- /// </para>
- /// <para>
- /// The 'L' character is allowed for the day-of-month and day-of-week fields.
- /// This character is short-hand for "last", but it has different
- /// meaning in each of the two fields. For example, the value "L" in
- /// the day-of-month field means "the last day of the month" - day 31
- /// for January, day 28 for February on non-leap years. If used in the
- /// day-of-week field by itself, it simply means "7" or
- /// "SAT". But if used in the day-of-week field after another value, it
- /// means "the last xxx day of the month" - for example "6L"
- /// means "the last friday of the month". You can also specify an offset
- /// from the last day of the month, such as "L-3" which would mean the third-to-last
- /// day of the calendar month. <i>When using the 'L' option, it is important not to
- /// specify lists, or ranges of values, as you'll get confusing/unexpected results.</i>
- /// </para>
- /// <para>
- /// The 'W' character is allowed for the day-of-month field. This character
- /// is used to specify the weekday (Monday-Friday) nearest the given day. As an
- /// example, if you were to specify "15W" as the value for the
- /// day-of-month field, the meaning is: "the nearest weekday to the 15th of
- /// the month". So if the 15th is a Saturday, the trigger will fire on
- /// Friday the 14th. If the 15th is a Sunday, the trigger will fire on Monday the
- /// 16th. If the 15th is a Tuesday, then it will fire on Tuesday the 15th.
- /// However if you specify "1W" as the value for day-of-month, and the
- /// 1st is a Saturday, the trigger will fire on Monday the 3rd, as it will not
- /// 'jump' over the boundary of a month's days. The 'W' character can only be
- /// specified when the day-of-month is a single day, not a range or list of days.
- /// </para>
- /// <para>
- /// The 'L' and 'W' characters can also be combined for the day-of-month
- /// expression to yield 'LW', which translates to "last weekday of the
- /// month".
- /// </para>
- /// <para>
- /// The '#' character is allowed for the day-of-week field. This character is
- /// used to specify "the nth" XXX day of the month. For example, the
- /// value of "6#3" in the day-of-week field means the third Friday of
- /// the month (day 6 = Friday and "#3" = the 3rd one in the month).
- /// Other examples: "2#1" = the first Monday of the month and
- /// "4#5" = the fifth Wednesday of the month. Note that if you specify
- /// "#5" and there is not 5 of the given day-of-week in the month, then
- /// no firing will occur that month. If the '#' character is used, there can
- /// only be one expression in the day-of-week field ("3#1,6#3" is
- /// not valid, since there are two expressions).
- /// </para>
- /// <para>
- /// <!--The 'C' character is allowed for the day-of-month and day-of-week fields.
- /// This character is short-hand for "calendar". This means values are
- /// calculated against the associated calendar, if any. If no calendar is
- /// associated, then it is equivalent to having an all-inclusive calendar. A
- /// value of "5C" in the day-of-month field means "the first day included by the
- /// calendar on or after the 5th". A value of "1C" in the day-of-week field
- /// means "the first day included by the calendar on or after Sunday". -->
- /// </para>
- /// <para>
- /// The legal characters and the names of months and days of the week are not
- /// case sensitive.
- /// </para>
- /// <para>
- /// <b>NOTES:</b>
- /// <ul>
- /// <li>Support for specifying both a day-of-week and a day-of-month value is
- /// not complete (you'll need to use the '?' character in one of these fields).
- /// </li>
- /// <li>Overflowing ranges is supported - that is, having a larger number on
- /// the left hand side than the right. You might do 22-2 to catch 10 o'clock
- /// at night until 2 o'clock in the morning, or you might have NOV-FEB. It is
- /// very important to note that overuse of overflowing ranges creates ranges
- /// that don't make sense and no effort has been made to determine which
- /// interpretation CronExpression chooses. An example would be
- /// "0 0 14-6 ? * FRI-MON". </li>
- /// </ul>
- /// </para>
- /// </remarks>
- /// <author>Sharada Jambula</author>
- /// <author>James House</author>
- /// <author>Contributions from Mads Henderson</author>
- /// <author>Refactoring from CronTrigger to CronExpression by Aaron Craven</author>
- /// <author>Marko Lahma (.NET)</author>
- [Serializable]
- public class CronExpression : IDeserializationCallback, ISerializable
- {
- /// <summary>
- /// Field specification for second.
- /// </summary>
- protected const int Second = 0;
- /// <summary>
- /// Field specification for minute.
- /// </summary>
- protected const int Minute = 1;
- /// <summary>
- /// Field specification for hour.
- /// </summary>
- protected const int Hour = 2;
- /// <summary>
- /// Field specification for day of month.
- /// </summary>
- protected const int DayOfMonth = 3;
- /// <summary>
- /// Field specification for month.
- /// </summary>
- protected const int Month = 4;
- /// <summary>
- /// Field specification for day of week.
- /// </summary>
- protected const int DayOfWeek = 5;
- /// <summary>
- /// Field specification for year.
- /// </summary>
- protected const int Year = 6;
- /// <summary>
- /// Field specification for all wildcard value '*'.
- /// </summary>
- protected const int AllSpecInt = 99; // '*'
- /// <summary>
- /// Field specification for not specified value '?'.
- /// </summary>
- protected const int NoSpecInt = 98; // '?'
- /// <summary>
- /// Field specification for wildcard '*'.
- /// </summary>
- protected const int AllSpec = AllSpecInt;
- /// <summary>
- /// Field specification for no specification at all '?'.
- /// </summary>
- protected const int NoSpec = NoSpecInt;
- private static readonly Dictionary<string, int> monthMap = new Dictionary<string, int>(20);
- private static readonly Dictionary<string, int> dayMap = new Dictionary<string, int>(60);
- private TimeZoneInfo timeZone;
- /// <summary>
- /// Seconds.
- /// </summary>
- [NonSerialized] protected SortedSet<int> seconds;
- /// <summary>
- /// minutes.
- /// </summary>
- [NonSerialized] protected SortedSet<int> minutes;
- /// <summary>
- /// Hours.
- /// </summary>
- [NonSerialized] protected SortedSet<int> hours;
- /// <summary>
- /// Days of month.
- /// </summary>
- [NonSerialized] protected SortedSet<int> daysOfMonth;
- /// <summary>
- /// Months.
- /// </summary>
- [NonSerialized] protected SortedSet<int> months;
- /// <summary>
- /// Days of week.
- /// </summary>
- [NonSerialized] protected SortedSet<int> daysOfWeek;
- /// <summary>
- /// Years.
- /// </summary>
- [NonSerialized] protected SortedSet<int> years;
- /// <summary>
- /// Last day of week.
- /// </summary>
- [NonSerialized] protected bool lastdayOfWeek;
- /// <summary>
- /// N number of weeks.
- /// </summary>
- [NonSerialized] protected int everyNthWeek;
- /// <summary>
- /// Nth day of week.
- /// </summary>
- [NonSerialized] protected int nthdayOfWeek;
- /// <summary>
- /// Last day of month.
- /// </summary>
- [NonSerialized] protected bool lastdayOfMonth;
- /// <summary>
- /// Nearest weekday.
- /// </summary>
- [NonSerialized] protected bool nearestWeekday;
- [NonSerialized] protected int lastdayOffset;
- /// <summary>
- /// Calendar day of week.
- /// </summary>
- [NonSerialized] protected bool calendardayOfWeek;
- /// <summary>
- /// Calendar day of month.
- /// </summary>
- [NonSerialized] protected bool calendardayOfMonth;
- /// <summary>
- /// Expression parsed.
- /// </summary>
- [NonSerialized] protected bool expressionParsed;
- public static readonly int MaxYear = DateTime.Now.Year + 100;
- private static readonly char[] splitSeparators = {' ', '\t', '\r', '\n'};
- private static readonly char[] commaSeparator = {','};
- private static readonly Regex regex = new Regex("^L-[0-9]*[W]?", RegexOptions.Compiled);
- static CronExpression()
- {
- monthMap.Add("JAN", 0);
- monthMap.Add("FEB", 1);
- monthMap.Add("MAR", 2);
- monthMap.Add("APR", 3);
- monthMap.Add("MAY", 4);
- monthMap.Add("JUN", 5);
- monthMap.Add("JUL", 6);
- monthMap.Add("AUG", 7);
- monthMap.Add("SEP", 8);
- monthMap.Add("OCT", 9);
- monthMap.Add("NOV", 10);
- monthMap.Add("DEC", 11);
- dayMap.Add("SUN", 1);
- dayMap.Add("MON", 2);
- dayMap.Add("TUE", 3);
- dayMap.Add("WED", 4);
- dayMap.Add("THU", 5);
- dayMap.Add("FRI", 6);
- dayMap.Add("SAT", 7);
- }
- private CronExpression()
- {
- }
- ///<summary>
- /// Constructs a new <see cref="CronExpressionString" /> based on the specified
- /// parameter.
- /// </summary>
- /// <param name="cronExpression">
- /// String representation of the cron expression the new object should represent
- /// </param>
- /// <see cref="CronExpressionString" />
- public CronExpression(string cronExpression)
- {
- if (cronExpression == null)
- {
- throw new ArgumentException("cronExpression cannot be null");
- }
- CronExpressionString = CultureInfo.InvariantCulture.TextInfo.ToUpper(cronExpression);
- BuildExpression(CronExpressionString);
- }
- /// <summary>
- /// Serialization constructor.
- /// </summary>
- /// <param name="info"></param>
- /// <param name="context"></param>
- protected CronExpression(SerializationInfo info, StreamingContext context)
- {
- int version;
- try
- {
- version = info.GetInt32("version");
- }
- catch
- {
- version = 0;
- }
- switch (version)
- {
- case 0:
- CronExpressionString = (string) info.GetValue("cronExpressionString", typeof(string));
- TimeZone = (TimeZoneInfo) info.GetValue("timeZone", typeof(TimeZoneInfo));
- break;
- case 1:
- CronExpressionString = (string) info.GetValue("cronExpression", typeof(string));
- var timeZoneId = (string) info.GetValue("timeZoneId", typeof(string));
- if (!string.IsNullOrEmpty(timeZoneId))
- {
- timeZone = TimeZoneUtil.FindTimeZoneById(timeZoneId);
- }
- break;
- default:
- throw new NotSupportedException("Unknown serialization version");
- }
- }
- [System.Security.SecurityCritical]
- public void GetObjectData(SerializationInfo info, StreamingContext context)
- {
- info.AddValue("version", 1);
- info.AddValue("cronExpression", CronExpressionString);
- info.AddValue("timeZoneId", TimeZone.Id);
- }
- /// <summary>
- /// Indicates whether the given date satisfies the cron expression.
- /// </summary>
- /// <remarks>
- /// Note that milliseconds are ignored, so two Dates falling on different milliseconds
- /// of the same second will always have the same result here.
- /// </remarks>
- /// <param name="dateUtc">The date to evaluate.</param>
- /// <returns>a boolean indicating whether the given date satisfies the cron expression</returns>
- public virtual bool IsSatisfiedBy(DateTimeOffset dateUtc)
- {
- var withoutMilliseconds = new DateTimeOffset(dateUtc.Year, dateUtc.Month, dateUtc.Day, dateUtc.Hour, dateUtc.Minute, dateUtc.Second, dateUtc.Offset);
- DateTimeOffset test = withoutMilliseconds.AddSeconds(-1);
- DateTimeOffset? timeAfter = GetTimeAfter(test);
- if (timeAfter.HasValue
- && timeAfter.Value.Equals(withoutMilliseconds))
- {
- return true;
- }
- return false;
- }
- /// <summary>
- /// Returns the next date/time <i>after</i> the given date/time which
- /// satisfies the cron expression.
- /// </summary>
- /// <param name="date">the date/time at which to begin the search for the next valid date/time</param>
- /// <returns>the next valid date/time</returns>
- public virtual DateTimeOffset? GetNextValidTimeAfter(DateTimeOffset date)
- {
- return GetTimeAfter(date);
- }
- /// <summary>
- /// Returns the next date/time <i>after</i> the given date/time which does
- /// <i>not</i> satisfy the expression.
- /// </summary>
- /// <param name="date">the date/time at which to begin the search for the next invalid date/time</param>
- /// <returns>the next valid date/time</returns>
- public virtual DateTimeOffset? GetNextInvalidTimeAfter(DateTimeOffset date)
- {
- long difference = 1000;
- //move back to the nearest second so differences will be accurate
- DateTimeOffset lastDate =
- new DateTimeOffset(date.Year, date.Month, date.Day, date.Hour, date.Minute, date.Second, date.Offset).AddSeconds(-1);
- //TODO: IMPROVE THIS! The following is a BAD solution to this problem. Performance will be very bad here, depending on the cron expression. It is, however A solution.
- //keep getting the next included time until it's farther than one second
- // apart. At that point, lastDate is the last valid fire time. We return
- // the second immediately following it.
- while (difference == 1000)
- {
- DateTimeOffset? newDate = GetTimeAfter(lastDate);
- if (newDate == null)
- {
- break;
- }
- difference = (long) (newDate.Value - lastDate).TotalMilliseconds;
- if (difference == 1000)
- {
- lastDate = newDate.Value;
- }
- }
- return lastDate.AddSeconds(1);
- }
- /// <summary>
- /// Sets or gets the time zone for which the <see cref="CronExpression" /> of this
- /// <see cref="ICronTrigger" /> will be resolved.
- /// </summary>
- public TimeZoneInfo TimeZone
- {
- set => timeZone = value;
- get
- {
- if (timeZone == null)
- {
- timeZone = TimeZoneInfo.Local;
- }
- return timeZone;
- }
- }
- /// <summary>
- /// Returns the string representation of the <see cref="CronExpression" />
- /// </summary>
- /// <returns>The string representation of the <see cref="CronExpression" /></returns>
- public override string ToString()
- {
- return CronExpressionString;
- }
- /// <summary>
- /// Indicates whether the specified cron expression can be parsed into a
- /// valid cron expression
- /// </summary>
- /// <param name="cronExpression">the expression to evaluate</param>
- /// <returns>a boolean indicating whether the given expression is a valid cron
- /// expression</returns>
- public static bool IsValidExpression(string cronExpression)
- {
- try
- {
- new CronExpression(cronExpression);
- }
- catch (FormatException)
- {
- return false;
- }
- return true;
- }
- public static void ValidateExpression(string cronExpression)
- {
- new CronExpression(cronExpression);
- }
- ////////////////////////////////////////////////////////////////////////////
- //
- // Expression Parsing Functions
- //
- ////////////////////////////////////////////////////////////////////////////
- /// <summary>
- /// Builds the expression.
- /// </summary>
- /// <param name="expression">The expression.</param>
- protected void BuildExpression(string expression)
- {
- expressionParsed = true;
- try
- {
- if (seconds == null)
- {
- seconds = new SortedSet<int>();
- }
- if (minutes == null)
- {
- minutes = new SortedSet<int>();
- }
- if (hours == null)
- {
- hours = new SortedSet<int>();
- }
- if (daysOfMonth == null)
- {
- daysOfMonth = new SortedSet<int>();
- }
- if (months == null)
- {
- months = new SortedSet<int>();
- }
- if (daysOfWeek == null)
- {
- daysOfWeek = new SortedSet<int>();
- }
- if (years == null)
- {
- years = new SortedSet<int>();
- }
- int exprOn = Second;
- string[] exprsTok = expression.Split(splitSeparators, StringSplitOptions.RemoveEmptyEntries);
- foreach (string exprTok in exprsTok)
- {
- string expr = exprTok.Trim();
- if (expr.Length == 0)
- {
- continue;
- }
- if (exprOn > Year)
- {
- break;
- }
- // throw an exception if L is used with other days of the month
- if (exprOn == DayOfMonth && expr.IndexOf('L') != -1 && expr.Length > 1 && expr.IndexOf(",", StringComparison.Ordinal) >= 0)
- {
- throw new FormatException("Support for specifying 'L' and 'LW' with other days of the month is not implemented");
- }
- // throw an exception if L is used with other days of the week
- if (exprOn == DayOfWeek && expr.IndexOf('L') != -1 && expr.Length > 1 && expr.IndexOf(",", StringComparison.Ordinal) >= 0)
- {
- throw new FormatException("Support for specifying 'L' with other days of the week is not implemented");
- }
- if (exprOn == DayOfWeek && expr.IndexOf('#') != -1 && expr.IndexOf('#', expr.IndexOf('#') + 1) != -1)
- {
- throw new FormatException("Support for specifying multiple \"nth\" days is not implemented.");
- }
- string[] vTok = expr.Split(commaSeparator);
- foreach (string v in vTok)
- {
- StoreExpressionVals(0, v, exprOn);
- }
- exprOn++;
- }
- if (exprOn <= DayOfWeek)
- {
- throw new FormatException("Unexpected end of expression.");
- }
- if (exprOn <= Year)
- {
- StoreExpressionVals(0, "*", Year);
- }
- ISet<int> dow = GetSet(DayOfWeek);
- ISet<int> dom = GetSet(DayOfMonth);
- // Copying the logic from the UnsupportedOperationException below
- bool dayOfMSpec = !dom.Contains(NoSpec);
- bool dayOfWSpec = !dow.Contains(NoSpec);
- if (dayOfMSpec && !dayOfWSpec)
- {
- // skip
- }
- else if (dayOfWSpec && !dayOfMSpec)
- {
- // skip
- }
- else
- {
- throw new FormatException("Support for specifying both a day-of-week AND a day-of-month parameter is not implemented.");
- }
- }
- catch (FormatException)
- {
- throw;
- }
- catch (Exception e)
- {
- throw new FormatException($"Illegal cron expression format ({e.Message})", e);
- }
- }
- /// <summary>
- /// Stores the expression values.
- /// </summary>
- /// <param name="pos">The position.</param>
- /// <param name="s">The string to traverse.</param>
- /// <param name="type">The type of value.</param>
- /// <returns></returns>
- protected virtual int StoreExpressionVals(int pos, string s, int type)
- {
- int incr = 0;
- int i = SkipWhiteSpace(pos, s);
- if (i >= s.Length)
- {
- return i;
- }
- char c = s[i];
- if (c >= 'A' && c <= 'Z' && !s.Equals("L") && !s.Equals("LW") && !regex.IsMatch(s))
- {
- string sub = s.Substring(i, 3);
- int sval;
- int eval = -1;
- if (type == Month)
- {
- sval = GetMonthNumber(sub) + 1;
- if (sval <= 0)
- {
- throw new FormatException($"Invalid Month value: '{sub}'");
- }
- if (s.Length > i + 3)
- {
- c = s[i + 3];
- if (c == '-')
- {
- i += 4;
- sub = s.Substring(i, 3);
- eval = GetMonthNumber(sub) + 1;
- if (eval <= 0)
- {
- throw new FormatException(
- $"Invalid Month value: '{sub}'");
- }
- }
- }
- }
- else if (type == DayOfWeek)
- {
- sval = GetDayOfWeekNumber(sub);
- if (sval < 0)
- {
- throw new FormatException($"Invalid Day-of-Week value: '{sub}'");
- }
- if (s.Length > i + 3)
- {
- c = s[i + 3];
- if (c == '-')
- {
- i += 4;
- sub = s.Substring(i, 3);
- eval = GetDayOfWeekNumber(sub);
- if (eval < 0)
- {
- throw new FormatException(
- $"Invalid Day-of-Week value: '{sub}'");
- }
- }
- else if (c == '#')
- {
- try
- {
- i += 4;
- nthdayOfWeek = Convert.ToInt32(s.Substring(i), CultureInfo.InvariantCulture);
- if (nthdayOfWeek < 1 || nthdayOfWeek > 5)
- {
- throw new Exception();
- }
- }
- catch (Exception)
- {
- throw new FormatException(
- "A numeric value between 1 and 5 must follow the '#' option");
- }
- }
- else if (c == '/')
- {
- try
- {
- i += 4;
- everyNthWeek = Convert.ToInt32(s.Substring(i), CultureInfo.InvariantCulture);
- if (everyNthWeek < 1 || everyNthWeek > 5)
- {
- throw new Exception();
- }
- }
- catch (Exception)
- {
- throw new FormatException(
- "A numeric value between 1 and 5 must follow the '/' option");
- }
- }
- else if (c == 'L')
- {
- lastdayOfWeek = true;
- i++;
- }
- else
- {
- throw new FormatException($"Illegal characters for this position: '{sub}'");
- }
- }
- }
- else
- {
- throw new FormatException($"Illegal characters for this position: '{sub}'");
- }
- if (eval != -1)
- {
- incr = 1;
- }
- AddToSet(sval, eval, incr, type);
- return i + 3;
- }
- if (c == '?')
- {
- i++;
- if (i + 1 < s.Length && s[i] != ' ' && s[i + 1] != '\t')
- {
- throw new FormatException("Illegal character after '?': "
- + s[i]);
- }
- if (type != DayOfWeek && type != DayOfMonth)
- {
- throw new FormatException(
- "'?' can only be specified for Day-of-Month or Day-of-Week.");
- }
- if (type == DayOfWeek && !lastdayOfMonth)
- {
- int val = daysOfMonth.LastOrDefault();
- if (val == NoSpecInt)
- {
- throw new FormatException(
- "'?' can only be specified for Day-of-Month -OR- Day-of-Week.");
- }
- }
- AddToSet(NoSpecInt, -1, 0, type);
- return i;
- }
- var startsWithAsterisk = c == '*';
- if (startsWithAsterisk || c == '/')
- {
- if (startsWithAsterisk && i + 1 >= s.Length)
- {
- AddToSet(AllSpecInt, -1, incr, type);
- return i + 1;
- }
- if (c == '/' && (i + 1 >= s.Length || s[i + 1] == ' ' || s[i + 1] == '\t'))
- {
- throw new FormatException("'/' must be followed by an integer.");
- }
- if (startsWithAsterisk)
- {
- i++;
- }
- c = s[i];
- if (c == '/')
- {
- // is an increment specified?
- i++;
- if (i >= s.Length)
- {
- throw new FormatException("Unexpected end of string.");
- }
- incr = GetNumericValue(s, i);
- i++;
- if (incr > 10)
- {
- i++;
- }
- CheckIncrementRange(incr, type);
- }
- else
- {
- if (startsWithAsterisk)
- {
- // invalid value s
- throw new FormatException("Illegal characters after asterisk: " + s);
- }
- incr = 1;
- }
- AddToSet(AllSpecInt, -1, incr, type);
- return i;
- }
- if (c == 'L')
- {
- i++;
- if (type == DayOfMonth)
- {
- lastdayOfMonth = true;
- }
- if (type == DayOfWeek)
- {
- AddToSet(7, 7, 0, type);
- }
- if (type == DayOfMonth && s.Length > i)
- {
- c = s[i];
- if (c == '-')
- {
- ValueSet vs = GetValue(0, s, i + 1);
- lastdayOffset = vs.theValue;
- if (lastdayOffset > 30)
- {
- throw new FormatException("Offset from last day must be <= 30");
- }
- i = vs.pos;
- }
- if (s.Length > i)
- {
- c = s[i];
- if (c == 'W')
- {
- nearestWeekday = true;
- i++;
- }
- }
- }
- return i;
- }
- if (c >= '0' && c <= '9')
- {
- int val = Convert.ToInt32(c.ToString(), CultureInfo.InvariantCulture);
- i++;
- if (i >= s.Length)
- {
- AddToSet(val, -1, -1, type);
- }
- else
- {
- c = s[i];
- if (c >= '0' && c <= '9')
- {
- ValueSet vs = GetValue(val, s, i);
- val = vs.theValue;
- i = vs.pos;
- }
- i = CheckNext(i, s, val, type);
- return i;
- }
- }
- else
- {
- throw new FormatException($"Unexpected character: {c}");
- }
- return i;
- }
- // ReSharper disable once UnusedParameter.Local
- private static void CheckIncrementRange(int incr, int type)
- {
- if (incr > 59 && (type == Second || type == Minute))
- {
- throw new FormatException($"Increment > 60 : {incr}");
- }
- if (incr > 23 && type == Hour)
- {
- throw new FormatException($"Increment > 24 : {incr}");
- }
- if (incr > 31 && type == DayOfMonth)
- {
- throw new FormatException($"Increment > 31 : {incr}");
- }
- if (incr > 7 && type == DayOfWeek)
- {
- throw new FormatException($"Increment > 7 : {incr}");
- }
- if (incr > 12 && type == Month)
- {
- throw new FormatException($"Increment > 12 : {incr}");
- }
- }
- /// <summary>
- /// Checks the next value.
- /// </summary>
- /// <param name="pos">The position.</param>
- /// <param name="s">The string to check.</param>
- /// <param name="val">The value.</param>
- /// <param name="type">The type to search.</param>
- /// <returns></returns>
- protected virtual int CheckNext(int pos, string s, int val, int type)
- {
- int end = -1;
- int i = pos;
- if (i >= s.Length)
- {
- AddToSet(val, end, -1, type);
- return i;
- }
- char c = s[pos];
- if (c == 'L')
- {
- if (type == DayOfWeek)
- {
- if (val < 1 || val > 7)
- {
- throw new FormatException("Day-of-Week values must be between 1 and 7");
- }
- lastdayOfWeek = true;
- }
- else
- {
- throw new FormatException($"'L' option is not valid here. (pos={i})");
- }
- ISet<int> data = GetSet(type);
- data.Add(val);
- i++;
- return i;
- }
- if (c == 'W')
- {
- if (type == DayOfMonth)
- {
- nearestWeekday = true;
- }
- else
- {
- throw new FormatException($"'W' option is not valid here. (pos={i})");
- }
- if (val > 31)
- {
- throw new FormatException("The 'W' option does not make sense with values larger than 31 (max number of days in a month)");
- }
- ISet<int> data = GetSet(type);
- data.Add(val);
- i++;
- return i;
- }
- if (c == '#')
- {
- if (type != DayOfWeek)
- {
- throw new FormatException(
- $"'#' option is not valid here. (pos={i})");
- }
- i++;
- try
- {
- nthdayOfWeek = Convert.ToInt32(s.Substring(i), CultureInfo.InvariantCulture);
- if (nthdayOfWeek < 1 || nthdayOfWeek > 5)
- {
- throw new Exception();
- }
- }
- catch (Exception)
- {
- throw new FormatException(
- "A numeric value between 1 and 5 must follow the '#' option");
- }
- ISet<int> data = GetSet(type);
- data.Add(val);
- i++;
- return i;
- }
- if (c == 'C')
- {
- if (type == DayOfWeek)
- {
- calendardayOfWeek = true;
- }
- else if (type == DayOfMonth)
- {
- calendardayOfMonth = true;
- }
- else
- {
- throw new FormatException($"'C' option is not valid here. (pos={i})");
- }
- ISet<int> data = GetSet(type);
- data.Add(val);
- i++;
- return i;
- }
- if (c == '-')
- {
- i++;
- c = s[i];
- int v = Convert.ToInt32(c.ToString(), CultureInfo.InvariantCulture);
- end = v;
- i++;
- if (i >= s.Length)
- {
- AddToSet(val, end, 1, type);
- return i;
- }
- c = s[i];
- if (c >= '0' && c <= '9')
- {
- ValueSet vs = GetValue(v, s, i);
- int v1 = vs.theValue;
- end = v1;
- i = vs.pos;
- }
- if (i < s.Length && s[i] == '/')
- {
- i++;
- c = s[i];
- int v2 = Convert.ToInt32(c.ToString(), CultureInfo.InvariantCulture);
- i++;
- if (i >= s.Length)
- {
- AddToSet(val, end, v2, type);
- return i;
- }
- c = s[i];
- if (c >= '0' && c <= '9')
- {
- ValueSet vs = GetValue(v2, s, i);
- int v3 = vs.theValue;
- AddToSet(val, end, v3, type);
- i = vs.pos;
- return i;
- }
- AddToSet(val, end, v2, type);
- return i;
- }
- AddToSet(val, end, 1, type);
- return i;
- }
- if (c == '/')
- {
- if (i + 1 >= s.Length || s[i + 1] == ' ' || s[i + 1] == '\t')
- {
- throw new FormatException("\'/\' must be followed by an integer.");
- }
- i++;
- c = s[i];
- int v2 = Convert.ToInt32(c.ToString(), CultureInfo.InvariantCulture);
- i++;
- if (i >= s.Length)
- {
- CheckIncrementRange(v2, type);
- AddToSet(val, end, v2, type);
- return i;
- }
- c = s[i];
- if (c >= '0' && c <= '9')
- {
- ValueSet vs = GetValue(v2, s, i);
- int v3 = vs.theValue;
- CheckIncrementRange(v3, type);
- AddToSet(val, end, v3, type);
- i = vs.pos;
- return i;
- }
- throw new FormatException($"Unexpected character '{c}' after '/'");
- }
- AddToSet(val, end, 0, type);
- i++;
- return i;
- }
- /// <summary>
- /// Gets the cron expression string.
- /// </summary>
- /// <value>The cron expression string.</value>
- public string CronExpressionString { get; }
- /// <summary>
- /// Gets the expression summary.
- /// </summary>
- /// <returns></returns>
- public virtual string GetExpressionSummary()
- {
- StringBuilder buf = new StringBuilder();
- buf.Append("seconds: ");
- buf.Append(GetExpressionSetSummary(seconds));
- buf.Append("\n");
- buf.Append("minutes: ");
- buf.Append(GetExpressionSetSummary(minutes));
- buf.Append("\n");
- buf.Append("hours: ");
- buf.Append(GetExpressionSetSummary(hours));
- buf.Append("\n");
- buf.Append("daysOfMonth: ");
- buf.Append(GetExpressionSetSummary(daysOfMonth));
- buf.Append("\n");
- buf.Append("months: ");
- buf.Append(GetExpressionSetSummary(months));
- buf.Append("\n");
- buf.Append("daysOfWeek: ");
- buf.Append(GetExpressionSetSummary(daysOfWeek));
- buf.Append("\n");
- buf.Append("lastdayOfWeek: ");
- buf.Append(lastdayOfWeek);
- buf.Append("\n");
- buf.Append("nearestWeekday: ");
- buf.Append(nearestWeekday);
- buf.Append("\n");
- buf.Append("NthDayOfWeek: ");
- buf.Append(nthdayOfWeek);
- buf.Append("\n");
- buf.Append("lastdayOfMonth: ");
- buf.Append(lastdayOfMonth);
- buf.Append("\n");
- buf.Append("calendardayOfWeek: ");
- buf.Append(calendardayOfWeek);
- buf.Append("\n");
- buf.Append("calendardayOfMonth: ");
- buf.Append(calendardayOfMonth);
- buf.Append("\n");
- buf.Append("years: ");
- buf.Append(GetExpressionSetSummary(years));
- buf.Append("\n");
- return buf.ToString();
- }
- /// <summary>
- /// Gets the expression set summary.
- /// </summary>
- /// <param name="data">The data.</param>
- /// <returns></returns>
- protected virtual string GetExpressionSetSummary(ICollection<int> data)
- {
- if (data.Contains(NoSpec))
- {
- return "?";
- }
- if (data.Contains(AllSpec))
- {
- return "*";
- }
- StringBuilder buf = new StringBuilder();
- bool first = true;
- foreach (int iVal in data)
- {
- string val = iVal.ToString(CultureInfo.InvariantCulture);
- if (!first)
- {
- buf.Append(",");
- }
- buf.Append(val);
- first = false;
- }
- return buf.ToString();
- }
- /// <summary>
- /// Skips the white space.
- /// </summary>
- /// <param name="i">The i.</param>
- /// <param name="s">The s.</param>
- /// <returns></returns>
- protected virtual int SkipWhiteSpace(int i, string s)
- {
- for (; i < s.Length && (s[i] == ' ' || s[i] == '\t'); i++)
- {
- }
- return i;
- }
- /// <summary>
- /// Finds the next white space.
- /// </summary>
- /// <param name="i">The i.</param>
- /// <param name="s">The s.</param>
- /// <returns></returns>
- protected virtual int FindNextWhiteSpace(int i, string s)
- {
- for (; i < s.Length && (s[i] != ' ' || s[i] != '\t'); i++)
- {
- }
- return i;
- }
- /// <summary>
- /// Adds to set.
- /// </summary>
- /// <param name="val">The val.</param>
- /// <param name="end">The end.</param>
- /// <param name="incr">The incr.</param>
- /// <param name="type">The type.</param>
- protected virtual void AddToSet(int val, int end, int incr, int type)
- {
- ISet<int> data = GetSet(type);
- if (type == Second || type == Minute)
- {
- if ((val < 0 || val > 59 || end > 59) && val != AllSpecInt)
- {
- throw new FormatException(
- "Minute and Second values must be between 0 and 59");
- }
- }
- else if (type == Hour)
- {
- if ((val < 0 || val > 23 || end > 23) && val != AllSpecInt)
- {
- throw new FormatException(
- "Hour values must be between 0 and 23");
- }
- }
- else if (type == DayOfMonth)
- {
- if ((val < 1 || val > 31 || end > 31) && val != AllSpecInt
- && val != NoSpecInt)
- {
- throw new FormatException(
- "Day of month values must be between 1 and 31");
- }
- }
- else if (type == Month)
- {
- if ((val < 1 || val > 12 || end > 12) && val != AllSpecInt)
- {
- throw new FormatException(
- "Month values must be between 1 and 12");
- }
- }
- else if (type == DayOfWeek)
- {
- if ((val == 0 || val > 7 || end > 7) && val != AllSpecInt
- && val != NoSpecInt)
- {
- throw new FormatException(
- "Day-of-Week values must be between 1 and 7");
- }
- }
- if ((incr == 0 || incr == -1) && val != AllSpecInt)
- {
- if (val != -1)
- {
- data.Add(val);
- }
- else
- {
- data.Add(NoSpec);
- }
- return;
- }
- int startAt = val;
- int stopAt = end;
- if (val == AllSpecInt && incr <= 0)
- {
- incr = 1;
- data.Add(AllSpec); // put in a marker, but also fill values
- }
- if (type == Second || type == Minute)
- {
- if (stopAt == -1)
- {
- stopAt = 59;
- }
- if (startAt == -1 || startAt == AllSpecInt)
- {
- startAt = 0;
- }
- }
- else if (type == Hour)
- {
- if (stopAt == -1)
- {
- stopAt = 23;
- }
- if (startAt == -1 || startAt == AllSpecInt)
- {
- startAt = 0;
- }
- }
- else if (type == DayOfMonth)
- {
- if (stopAt == -1)
- {
- stopAt = 31;
- }
- if (startAt == -1 || startAt == Al…
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