Package org.vaadin.addons.componentfactory.schedulexcalendar.util

Class RecurrenceEvaluator

java.lang.Object

org.vaadin.addons.componentfactory.schedulexcalendar.util.RecurrenceEvaluator

public class RecurrenceEvaluator
extends Object

Utility class to evaluate recurrence rules against a date range.

This evaluator checks whether at least one occurrence of a recurring event defined by a RecurrenceRule falls within a given date range.

Supported rule parts:

• FREQ=DAILY|WEEKLY|MONTHLY|YEARLY
• INTERVAL=n
• COUNT=n
• UNTIL=YYYYMMDD or YYYYMMDDTHHMMSS
• BYDAY=MO,TU,... (for WEEKLY)
• BYMONTHDAY=1,15,... (for MONTHLY)

This evaluator does not generate all occurrences. It stops early once it detects that an occurrence falls within the provided date range.

Constructor Summary

Constructors

Constructor	Description
RecurrenceEvaluator()

Method Summary

Modifier and Type	Method	Description
static boolean	occursInRange(RecurrenceRule rule, LocalDate startDate, LocalDate rangeStart, LocalDate rangeEnd)	Checks whether a recurring event described by rule and starting on startDate has at least one occurrence between rangeStart and rangeEnd.

Methods inherited from class java.lang.Object

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

Constructor Details

RecurrenceEvaluator

public RecurrenceEvaluator()

Method Details

occursInRange

public static boolean occursInRange(RecurrenceRule rule,
 LocalDate startDate,
 LocalDate rangeStart,
 LocalDate rangeEnd)

Checks whether a recurring event described by rule and starting on startDate has at least one occurrence between rangeStart and rangeEnd.

Parameters:

rule - the recurrence rule

startDate - the start date of the first occurrence

rangeStart - the inclusive start of the range to check

rangeEnd - the exclusive end of the range to check

Returns:

true if at least one recurrence falls in the range, false otherwise