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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.conferencescheduling.domain;

import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.Set;

import org.optaplanner.examples.common.domain.AbstractPersistable;

public class Timeslot extends AbstractPersistable {

    private LocalDateTime startDateTime;
    private LocalDateTime endDateTime;

    private Set talkTypeSet;
    private Set tagSet;

    // Cached
    private int durationInMinutes;

    public Timeslot() {
    }

    public Timeslot(long id) {
        super(id);
    }

    public LocalDate getDate() {
        return startDateTime.toLocalDate();
    }

    public int getDurationInMinutes() {
        return durationInMinutes;
    }

    public boolean overlapsTime(Timeslot other) {
        if (this == other) {
            return true;
        }
        return startDateTime.compareTo(other.endDateTime) < 0
                && other.startDateTime.compareTo(endDateTime) < 0;
    }

    public int getOverlapInMinutes(Timeslot other) {
        if (this == other) {
            return durationInMinutes;
        }
        LocalDateTime startMaximum = (startDateTime.compareTo(other.startDateTime) < 0) ? other.startDateTime : startDateTime;
        LocalDateTime endMinimum = (endDateTime.compareTo(other.endDateTime) < 0) ? endDateTime : other.endDateTime;
        return (int) Duration.between(startMaximum, endMinimum).toMinutes();
    }

    public boolean startsAfter(Timeslot other) {
        return other.endDateTime.compareTo(startDateTime) <= 0;
    }

    public boolean endsBefore(Timeslot other) {
        return endDateTime.compareTo(other.startDateTime) <= 0;
    }

    public boolean isOnSameDayAs(Timeslot other) {
        return startDateTime.toLocalDate().equals(other.getStartDateTime().toLocalDate());
    }

    public boolean pauseExists(Timeslot other, int pauseInMinutes) {
        if (this.overlapsTime(other)) {
            return false;
        }
        if (!this.isOnSameDayAs(other)) {
            return true;
        }
        Duration pause = startsAfter(other) ? Duration.between(other.getEndDateTime(), getStartDateTime())
                : Duration.between(getEndDateTime(), other.getStartDateTime());
        return pause.toMinutes() >= pauseInMinutes;
    }

    @Override
    public String toString() {
        return startDateTime + "-" + endDateTime.toLocalTime();
    }

    // ************************************************************************
    // Simple getters and setters
    // ************************************************************************

    public LocalDateTime getStartDateTime() {
        return startDateTime;
    }

    public void setStartDateTime(LocalDateTime startDateTime) {
        this.startDateTime = startDateTime;
        durationInMinutes = (startDateTime == null || endDateTime == null) ? 0
                : (int) Duration.between(startDateTime, endDateTime).toMinutes();
    }

    public LocalDateTime getEndDateTime() {
        return endDateTime;
    }

    public void setEndDateTime(LocalDateTime endDateTime) {
        this.endDateTime = endDateTime;
        durationInMinutes = (startDateTime == null || endDateTime == null) ? 0
                : (int) Duration.between(startDateTime, endDateTime).toMinutes();
    }

    public Set getTalkTypeSet() {
        return talkTypeSet;
    }

    public void setTalkTypeSet(Set talkTypeSet) {
        this.talkTypeSet = talkTypeSet;
    }

    public Set getTagSet() {
        return tagSet;
    }

    public void setTagSet(Set tagSet) {
        this.tagSet = tagSet;
    }

    // ************************************************************************
    // With methods
    // ************************************************************************

    public Timeslot withStartDateTime(LocalDateTime startDateTime) {
        setStartDateTime(startDateTime);
        return this;
    }

    public Timeslot withEndDateTime(LocalDateTime endDateTime) {
        setEndDateTime(endDateTime);
        return this;
    }

    public Timeslot withTalkTypeSet(Set talkTypeSet) {
        this.talkTypeSet = talkTypeSet;
        return this;
    }

    public Timeslot withTagSet(Set tagSet) {
        this.tagSet = tagSet;
        return this;
    }

}