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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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package org.optaplanner.examples.nurserostering.domain;

import java.time.DayOfWeek;
import java.util.EnumSet;

public enum WeekendDefinition {
    SATURDAY_SUNDAY("SaturdaySunday",
            DayOfWeek.SATURDAY, DayOfWeek.SUNDAY),
    FRIDAY_SATURDAY_SUNDAY("FridaySaturdaySunday",
            DayOfWeek.FRIDAY, DayOfWeek.SATURDAY, DayOfWeek.SUNDAY),
    FRIDAY_SATURDAY_SUNDAY_MONDAY("FridaySaturdaySundayMonday",
            DayOfWeek.FRIDAY, DayOfWeek.SATURDAY, DayOfWeek.SUNDAY, DayOfWeek.MONDAY),
    SATURDAY_SUNDAY_MONDAY("SaturdaySundayMonday",
            DayOfWeek.SATURDAY, DayOfWeek.SUNDAY, DayOfWeek.MONDAY);

    private EnumSet dayOfWeekSet;
    private DayOfWeek firstDayOfWeekend;
    private DayOfWeek lastDayOfWeekend;

    public static WeekendDefinition valueOfCode(String code) {
        for (WeekendDefinition weekendDefinition : values()) {
            if (code.equalsIgnoreCase(weekendDefinition.getCode())) {
                return weekendDefinition;
            }
        }
        return null;
    }

    private String code;

    private WeekendDefinition(String code, DayOfWeek dayOfWeekend1, DayOfWeek dayOfWeekend2) {
        this.code = code;
        this.dayOfWeekSet = EnumSet.of(dayOfWeekend1, dayOfWeekend2);
        this.firstDayOfWeekend = dayOfWeekend1;
        this.lastDayOfWeekend = dayOfWeekend2;
    }

    private WeekendDefinition(String code, DayOfWeek dayOfWeekend1, DayOfWeek dayOfWeekend2, DayOfWeek dayOfWeekend3) {
        this.code = code;
        this.dayOfWeekSet = EnumSet.of(dayOfWeekend1, dayOfWeekend2, dayOfWeekend3);
        this.firstDayOfWeekend = dayOfWeekend1;
        this.lastDayOfWeekend = dayOfWeekend3;
    }

    private WeekendDefinition(String code, DayOfWeek dayOfWeekend1, DayOfWeek dayOfWeekend2, DayOfWeek dayOfWeekend3,
            DayOfWeek dayOfWeekend4) {
        this.code = code;
        this.dayOfWeekSet = EnumSet.of(dayOfWeekend1, dayOfWeekend2, dayOfWeekend3, dayOfWeekend4);
        this.firstDayOfWeekend = dayOfWeekend1;
        this.lastDayOfWeekend = dayOfWeekend4;
    }

    public String getCode() {
        return code;
    }

    public DayOfWeek getFirstDayOfWeekend() {
        return firstDayOfWeekend;
    }

    public DayOfWeek getLastDayOfWeekend() {
        return lastDayOfWeekend;
    }

    @Override
    public String toString() {
        return code;
    }

    public boolean isWeekend(DayOfWeek dayOfWeek) {
        return dayOfWeekSet.contains(dayOfWeek);
    }

    public int getWeekendLength() {
        return dayOfWeekSet.size();
    }

}