TimePoint.java

package sample.util;

import java.io.Serializable;
import java.time.*;

import lombok.Value;
import sample.model.constraints.*;

/**
 * 日付と日時のペアを表現します。
 * <p>0:00に営業日切り替えが行われないケースなどでの利用を想定しています。
 */
@Value
public class TimePoint implements Serializable {
    private static final long serialVersionUID = 1L;
    /** 日付(営業日) */
    @ISODate
    private LocalDate day;
    /** 日付におけるシステム日時 */
    @ISODateTime
    private LocalDateTime date;

    public LocalDate day() {
        return getDay();
    }

    public LocalDateTime date() {
        return getDate();
    }

    /** 指定日付と同じか。(day == targetDay) */
    public boolean equalsDay(LocalDate targetDay) {
        return day.compareTo(targetDay) == 0;
    }

    /** 指定日付よりも前か。(day < targetDay) */
    public boolean beforeDay(LocalDate targetDay) {
        return day.compareTo(targetDay) < 0;
    }

    /** 指定日付以前か。(day <= targetDay) */
    public boolean beforeEqualsDay(LocalDate targetDay) {
        return day.compareTo(targetDay) <= 0;
    }

    /** 指定日付よりも後か。(targetDay < day) */
    public boolean afterDay(LocalDate targetDay) {
        return 0 < day.compareTo(targetDay);
    }

    /** 指定日付以降か。(targetDay <= day) */
    public boolean afterEqualsDay(LocalDate targetDay) {
        return 0 <= day.compareTo(targetDay);
    }

    /** 日付/日時を元にTimePointを生成します。 */
    public static TimePoint of(LocalDate day, LocalDateTime date) {
        return new TimePoint(day, date);
    }

    /** 日付を元にTimePointを生成します。 */
    public static TimePoint of(LocalDate day) {
        return of(day, day.atStartOfDay());
    }

    /** TimePointを生成します。 */
    public static TimePoint now() {
        LocalDateTime now = LocalDateTime.now();
        return of(now.toLocalDate(), now);
    }

    /** TimePointを生成します。 */
    public static TimePoint now(Clock clock) {
        LocalDateTime now = LocalDateTime.now(clock);
        return of(now.toLocalDate(), now);
    }

}