java-org.hwo/src/org/hwo/datetime/DateTime.java

package org.hwo.datetime;

import java.sql.Time;
import java.sql.Timestamp;
import java.util.Calendar;

public class DateTime {

	private Date	date;
	private TimeOfDay
			time;
	
	public DateTime()
	{
		this.setTime(new TimeOfDay());
		this.setDate(new Date());
	}
	
	public DateTime(Date date)
	{
		this.setTime(new TimeOfDay());
		this.setDate(new Date(date));
	}

	public DateTime(Date date,TimeOfDay time)
	{
		this.setTime(new TimeOfDay(time));
		this.setDate(new Date(date));
	}
	
	public DateTime(Timestamp timestamp){
		this.setTime(new TimeOfDay());
		this.setDate(new Date());
		setTimeStamp(timestamp);
	}
	
	public DateTime(DateTime source){
		this.date = source.getDate().Clone();
		this.time = new TimeOfDay(source.getTime());
	}

	static public DateTime NOW(){
		Calendar calendar = Calendar.getInstance();
		Timestamp ts = new Timestamp(calendar.getTimeInMillis());
		
		return new DateTime(ts);
	}
	
	public int compare(DateTime comp){
		int dc = this.date.compare(comp.getDate());
		if (dc != 0)
			return dc;
		return this.time.compare(comp.getTime());
	}
	
	public boolean isBefore(DateTime comp){
		return (compare(comp)<0);
	}
	public boolean isAfter(DateTime comp){
		return (compare(comp)>0);
	}
	public boolean isEqual(DateTime comp){
		return (compare(comp)==0);
	}
	

	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}

	public TimeOfDay getTime() {
		return time;
	}

	public void setTime(TimeOfDay time) {
		this.time = time;
	}
	
	public String getSQLDateTime(){
		return String.format("%s %s",this.date.getSQLDate(),this.time.getSQLTime());
	}
	
	public Timestamp getTimeStamp(){
		return new Timestamp(date.year -1900, date.month - 1, date.day, time.getHours(), time.getMinutes(), time.getSeconds(), 0);
	}
	
	public void setTimeStamp(Timestamp timestamp){
		this.date.setYear(timestamp.getYear()+1900);
		this.date.setMonth(timestamp.getMonth()+1);
		this.date.setDay(timestamp.getDay());
		this.time.setHours(timestamp.getHours());
		this.time.setMinutes(timestamp.getMinutes());
		this.time.setSeconds(timestamp.getSeconds());
	}
	
	public int secondsBefore(DateTime comp){
		int result = date.daysBefore(comp.getDate()) * TimeOfDay.SECONDSPERDAY;
		result += time.secondsBefore(comp.getTime());
		return result;
	}
	
	public void addSeconds(int seconds){
		TimeOfDay newTime = new TimeOfDay(time);
		int days = seconds / TimeOfDay.SECONDSPERDAY;
		seconds %= TimeOfDay.SECONDSPERDAY;
		
		date.addDays(days);
		newTime.setSeconds(newTime.getSeconds() + seconds);
		
		if (newTime.isEarlierThan(time))
			date.addDays(1);
		
		time = newTime;
	}
	
	@Override
	public String toString() {
		return getSQLDateTime();
	}
	
}