YearSecondTimestamp.java

/*******************************************************************************
 * Copyright (c) 2011 The Board of Trustees of the Leland Stanford Junior University
 * as Operator of the SLAC National Accelerator Laboratory.
 * Copyright (c) 2011 Brookhaven National Laboratory.
 * EPICS archiver appliance is distributed subject to a Software License Agreement found
 * in file LICENSE that is included with this distribution.
 *******************************************************************************/
package org.epics.archiverappliance.common;


/**
 * This is a version of a timestamp that breaks down time into a short year, a signed int secondsintoyear and a signed int nanos
 * This is the format that is used internally in the protocol buffers storage plugin.
 * When storing files partitioned by years, the year is dropped from the event, saving two bytes of storage per event.
 * When reconstructing such files, we determine the year from the file name and add it back in.
 * @author mshankar
 *
 */
public class YearSecondTimestamp implements Comparable<YearSecondTimestamp>{

	private short year;
	private int secondsintoyear;
	private int nanos;
	
	
	public YearSecondTimestamp(short year, int secondsintoyear, int nanos) {
		this.year = year;
		this.secondsintoyear = secondsintoyear;
		this.nanos = nanos;
	}
	
	public short getYear() {
		return year;
	}
	public void setYear(byte year) {
		this.year = year;
	}
	public int getSecondsintoyear() {
		return secondsintoyear;
	}
	public void setSecondsintoyear(int secondsintoyear) {
		this.secondsintoyear = secondsintoyear;
	}
	public int getNanos() {
		return nanos;
	}
	public void setNanos(int nanos) {
		this.nanos = nanos;
	}
	
	@Override
	public int compareTo(YearSecondTimestamp other) {
		if(this.year == other.year) {
			if(this.secondsintoyear == other.secondsintoyear) {
				if(this.nanos == other.nanos) {
					return 0;
				} else {
					return this.nanos - other.nanos;
				}
			} else {
				return this.secondsintoyear - other.secondsintoyear;
			}
		} else {
			return this.year - other.year;
		}
	}
}