com.atlassian.confluence.plugins.schedule.admin.support

Class CronExpressionValidator

java.lang.Object

com.atlassian.confluence.plugins.schedule.admin.support.CronExpressionValidator

public class CronExpressionValidator
extends Object

Validates a cron expression, and returns the future executions.

Method Summary

Modifier and Type	Method and Description
static List<Date>	getFutureSchedules(String cronExpressionValue, int limit) Finds the next execution occurences of a cron expression from now.
static List<Date>	getFutureSchedules(String cronExpressionValue, int limit, Date fromDate) Finds the next execution occurences of a cron expression from now.
static boolean	isValid(String cronExpressionValue) Determines if the cron expression is valid according to Quartz.

Methods inherited from class java.lang.Object

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

Method Detail

getFutureSchedules

public static List<Date> getFutureSchedules(String cronExpressionValue,
                                            int limit)
                                     throws ParseException

Finds the next execution occurences of a cron expression from now.

Parameters:

cronExpressionValue - the expression to evaluation

limit - the maximum number of dates to return

Returns:

a list of update "limit" dates for the next executions

Throws:

ParseException - if the cron expression is invalid

getFutureSchedules

public static List<Date> getFutureSchedules(String cronExpressionValue,
                                            int limit,
                                            Date fromDate)
                                     throws ParseException

Finds the next execution occurences of a cron expression from now.

Parameters:

cronExpressionValue - the expression to evaluation

limit - the maximum number of dates to return

fromDate - the date to start from, or now if null

Returns:

a list of update "limit" dates for the next executions

Throws:

ParseException - if the cron expression is invalid

isValid

public static boolean isValid(String cronExpressionValue)

Determines if the cron expression is valid according to Quartz.

The Quartz CronExpression seems a bit buggy - it seems to ignore last character in string when validating.

However, since ultimate the expression is consumed by Quartz, it will accept it anyway.

Parameters:

cronExpressionValue - the expression to validate

Returns:

true if considered valid