org.dhatim.businesshours

Class CronExpression

java.lang.Object

org.dhatim.businesshours.CronExpression

public class CronExpression
extends Object

A representation of cron expressions.

Author:

Maxime Suret

Constructor Summary

Constructors

Constructor and Description
CronExpression(Temporal temporal) Create a CronExpression that triggers when the given temporal occurs.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj) Tells if this cron expression is equals to the given one.
int	hashCode()
static Set<CronExpression>	merge(Collection<CronExpression> crons) Merge the given cron expressions where it is possible.
String	toString() Convert this cron expression into its string representation.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CronExpression

public CronExpression(Temporal temporal)

Create a CronExpression that triggers when the given temporal occurs. Only the following fields of the temporal (if they are supported) are supported:

• ChronoField.MINUTE_OF_HOUR
• ChronoField.HOUR_OF_DAY
• ChronoField.DAY_OF_MONTH
• ChronoField.MONTH_OF_YEAR
• ChronoField.DAY_OF_WEEK

Parameters:

temporal - the temporal from which to build the cron expression

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Tells if this cron expression is equals to the given one. Two cron expresions are equals if they trigger at exactly the same instants.

Overrides:

equals in class Object

Parameters:

obj - the object to this expression compare to

Returns:

true if the expressions are equals, false otherwise

toString

public String toString()

Convert this cron expression into its string representation.

Overrides:

toString in class Object

Returns:

the string representation of this cron expression

See Also:

the cron expression format

merge

public static Set<CronExpression> merge(Collection<CronExpression> crons)

Merge the given cron expressions where it is possible. For instance, "2 18 * * *" and "4 18 * * *" can be merged in "2,4 18 * * *".

Parameters:

crons - the cron expressions to merge

Returns:

the merged cron expressions. They will trigger at the exact same moments as the input cron expressions.