Package org.redisson.executor

Class CronExpression

java.lang.Object

org.redisson.executor.CronExpression

All Implemented Interfaces:

Serializable, Cloneable

public final class CronExpression
extends Object
implements Serializable, Cloneable

Author:

Sharada Jambula, James House, Contributions from Mads Henderson, Refactoring from CronTrigger to CronExpression by Aaron Craven

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static Integer	ALL_SPEC
protected static int	ALL_SPEC_INT
protected static int	DAY_OF_MONTH
protected static int	DAY_OF_WEEK
protected static Map<String,Integer>	dayMap
protected TreeSet<Integer>	daysOfMonth
protected TreeSet<Integer>	daysOfWeek
protected boolean	expressionParsed
protected static int	HOUR
protected TreeSet<Integer>	hours
protected int	lastdayOffset
protected boolean	lastdayOfMonth
protected boolean	lastdayOfWeek
static int	MAX_YEAR
protected static int	MINUTE
protected TreeSet<Integer>	minutes
protected static int	MONTH
protected static Map<String,Integer>	monthMap
protected TreeSet<Integer>	months
protected boolean	nearestWeekday
protected static Integer	NO_SPEC
protected static int	NO_SPEC_INT
protected int	nthdayOfWeek
protected static int	SECOND
protected TreeSet<Integer>	seconds
protected static int	YEAR
protected TreeSet<Integer>	years

Constructor Summary

Constructors

Constructor	Description
CronExpression(String cronExpression)	Constructs a new CronExpression based on the specified parameter.
CronExpression(CronExpression expression)	Constructs a new CronExpression as a copy of an existing instance.

Method Summary

Modifier and Type	Method	Description
protected void	addToSet(int val, int end, int incr, int type)
protected void	buildExpression(String expression)
protected int	checkNext(int pos, String s, int val, int type)
Object	clone()	Deprecated.
protected int	findNextWhiteSpace(int i, String s)
String	getCronExpression()
protected int	getDayOfWeekNumber(String s)
protected String	getExpressionSetSummary(ArrayList<Integer> list)
protected String	getExpressionSetSummary(Set<Integer> set)
String	getExpressionSummary()
Date	getFinalFireTime()
protected int	getLastDayOfMonth(int monthNum, int year)
protected int	getMonthNumber(String s)
Date	getNextInvalidTimeAfter(Date date)	Returns the next date/time after the given date/time which does not satisfy the expression
Date	getNextValidTimeAfter(Date date)	Returns the next date/time after the given date/time which satisfies the cron expression.
protected int	getNumericValue(String s, int i)
Date	getTimeAfter(Date afterTime)
Date	getTimeBefore(Date endTime)
TimeZone	getTimeZone()	Returns the time zone for which this CronExpression will be resolved.
protected org.redisson.executor.ValueSet	getValue(int v, String s, int i)
protected boolean	isLeapYear(int year)
boolean	isSatisfiedBy(Date date)	Indicates whether the given date satisfies the cron expression.
static boolean	isValidExpression(String cronExpression)	Indicates whether the specified cron expression can be parsed into a valid cron expression
protected void	setCalendarHour(Calendar cal, int hour)	Advance the calendar to the particular hour paying particular attention to daylight saving problems.
void	setTimeZone(TimeZone timeZone)	Sets the time zone for which this CronExpression will be resolved.
protected int	skipWhiteSpace(int i, String s)
protected int	storeExpressionVals(int pos, String s, int type)
String	toString()	Returns the string representation of the CronExpression
static void	validateExpression(String cronExpression)

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SECOND

protected static final int SECOND

See Also:

Constant Field Values

MINUTE

protected static final int MINUTE

See Also:

Constant Field Values

HOUR

protected static final int HOUR

See Also:

Constant Field Values

DAY_OF_MONTH

protected static final int DAY_OF_MONTH

See Also:

Constant Field Values

MONTH

protected static final int MONTH

See Also:

Constant Field Values

DAY_OF_WEEK

protected static final int DAY_OF_WEEK

See Also:

Constant Field Values

YEAR

protected static final int YEAR

See Also:

Constant Field Values

ALL_SPEC_INT

protected static final int ALL_SPEC_INT

See Also:

Constant Field Values

NO_SPEC_INT

protected static final int NO_SPEC_INT

See Also:

Constant Field Values

ALL_SPEC

protected static final Integer ALL_SPEC

NO_SPEC

protected static final Integer NO_SPEC

monthMap

protected static final Map<String,Integer> monthMap

dayMap

protected static final Map<String,Integer> dayMap

seconds

protected transient TreeSet<Integer> seconds

minutes

protected transient TreeSet<Integer> minutes

hours

protected transient TreeSet<Integer> hours

daysOfMonth

protected transient TreeSet<Integer> daysOfMonth

months

protected transient TreeSet<Integer> months

daysOfWeek

protected transient TreeSet<Integer> daysOfWeek

years

protected transient TreeSet<Integer> years

lastdayOfWeek

protected transient boolean lastdayOfWeek

nthdayOfWeek

protected transient int nthdayOfWeek

lastdayOfMonth

protected transient boolean lastdayOfMonth

nearestWeekday

protected transient boolean nearestWeekday

lastdayOffset

protected transient int lastdayOffset

expressionParsed

protected transient boolean expressionParsed

MAX_YEAR

public static final int MAX_YEAR

Constructor Detail

CronExpression

public CronExpression(String cronExpression)

Constructs a new CronExpression based on the specified parameter.

Parameters:

cronExpression - String representation of the cron expression the new object should represent

CronExpression

public CronExpression(CronExpression expression)

Constructs a new CronExpression as a copy of an existing instance.

Parameters:

expression - The existing cron expression to be copied

Method Detail

isSatisfiedBy

public boolean isSatisfiedBy(Date date)

Indicates whether the given date satisfies the cron expression. Note that milliseconds are ignored, so two Dates falling on different milliseconds of the same second will always have the same result here.

Parameters:

date - the date to evaluate

Returns:

a boolean indicating whether the given date satisfies the cron expression

getNextValidTimeAfter

public Date getNextValidTimeAfter(Date date)

Returns the next date/time after the given date/time which satisfies the cron expression.

Parameters:

date - the date/time at which to begin the search for the next valid date/time

Returns:

the next valid date/time

getNextInvalidTimeAfter

public Date getNextInvalidTimeAfter(Date date)

Returns the next date/time after the given date/time which does not satisfy the expression

Parameters:

date - the date/time at which to begin the search for the next invalid date/time

Returns:

the next valid date/time

getTimeZone

public TimeZone getTimeZone()

Returns the time zone for which this CronExpression will be resolved.

Returns:

time zone

setTimeZone

public void setTimeZone(TimeZone timeZone)

Sets the time zone for which this CronExpression will be resolved.

Parameters:

timeZone - object

toString

public String toString()

Returns the string representation of the CronExpression

Overrides:

toString in class Object

Returns:

a string representation of the CronExpression

isValidExpression

public static boolean isValidExpression(String cronExpression)

Indicates whether the specified cron expression can be parsed into a valid cron expression

Parameters:

cronExpression - the expression to evaluate

Returns:

a boolean indicating whether the given expression is a valid cron expression

validateExpression

public static void validateExpression(String cronExpression)
                               throws ParseException

Throws:

ParseException

buildExpression

protected void buildExpression(String expression)
                        throws ParseException

Throws:

ParseException

storeExpressionVals

protected int storeExpressionVals(int pos,
                                  String s,
                                  int type)
                           throws ParseException

Throws:

ParseException

checkNext

protected int checkNext(int pos,
                        String s,
                        int val,
                        int type)
                 throws ParseException

Throws:

ParseException

getCronExpression

public String getCronExpression()

getExpressionSummary

public String getExpressionSummary()

getExpressionSetSummary

protected String getExpressionSetSummary(Set<Integer> set)

getExpressionSetSummary

protected String getExpressionSetSummary(ArrayList<Integer> list)

skipWhiteSpace

protected int skipWhiteSpace(int i,
                             String s)

findNextWhiteSpace

protected int findNextWhiteSpace(int i,
                                 String s)

addToSet

protected void addToSet(int val,
                        int end,
                        int incr,
                        int type)
                 throws ParseException

Throws:

ParseException

getValue

protected org.redisson.executor.ValueSet getValue(int v,
                                                  String s,
                                                  int i)

getNumericValue

protected int getNumericValue(String s,
                              int i)

getMonthNumber

protected int getMonthNumber(String s)

getDayOfWeekNumber

protected int getDayOfWeekNumber(String s)

getTimeAfter

public Date getTimeAfter(Date afterTime)

setCalendarHour

protected void setCalendarHour(Calendar cal,
                               int hour)

Advance the calendar to the particular hour paying particular attention to daylight saving problems.

Parameters:

cal - the calendar to operate on

hour - the hour to set

getTimeBefore

public Date getTimeBefore(Date endTime)

getFinalFireTime

public Date getFinalFireTime()

isLeapYear

protected boolean isLeapYear(int year)

getLastDayOfMonth

protected int getLastDayOfMonth(int monthNum,
                                int year)

clone

@Deprecated
public Object clone()

Deprecated.

Overrides:

clone in class Object