DateTimeComponents.java
/* Copyright 2002-2016 CS Systèmes d'Information
* Licensed to CS Systèmes d'Information (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.time;
import java.io.Serializable;
import org.apache.commons.math3.util.FastMath;
import org.orekit.utils.Constants;
/** Holder for date and time components.
* <p>This class is a simple holder with no processing methods.</p>
* <p>Instance of this class are guaranteed to be immutable.</p>
* @see AbsoluteDate
* @see DateComponents
* @see TimeComponents
* @author Luc Maisonobe
*/
public class DateTimeComponents implements Serializable, Comparable<DateTimeComponents> {
/** Serializable UID. */
private static final long serialVersionUID = 5061129505488924484L;
/** Date component. */
private final DateComponents date;
/** Time component. */
private final TimeComponents time;
/** Build a new instance from its components.
* @param date date component
* @param time time component
*/
public DateTimeComponents(final DateComponents date, final TimeComponents time) {
this.date = date;
this.time = time;
}
/** Build an instance from raw level components.
* @param year year number (may be 0 or negative for BC years)
* @param month month number from 1 to 12
* @param day day number from 1 to 31
* @param hour hour number from 0 to 23
* @param minute minute number from 0 to 59
* @param second second number from 0.0 to 60.0 (excluded)
* @exception IllegalArgumentException if inconsistent arguments
* are given (parameters out of range, february 29 for non-leap years,
* dates during the gregorian leap in 1582 ...)
*/
public DateTimeComponents(final int year, final int month, final int day,
final int hour, final int minute, final double second)
throws IllegalArgumentException {
this.date = new DateComponents(year, month, day);
this.time = new TimeComponents(hour, minute, second);
}
/** Build an instance from raw level components.
* @param year year number (may be 0 or negative for BC years)
* @param month month enumerate
* @param day day number from 1 to 31
* @param hour hour number from 0 to 23
* @param minute minute number from 0 to 59
* @param second second number from 0.0 to 60.0 (excluded)
* @exception IllegalArgumentException if inconsistent arguments
* are given (parameters out of range, february 29 for non-leap years,
* dates during the gregorian leap in 1582 ...)
*/
public DateTimeComponents(final int year, final Month month, final int day,
final int hour, final int minute, final double second)
throws IllegalArgumentException {
this.date = new DateComponents(year, month, day);
this.time = new TimeComponents(hour, minute, second);
}
/** Build an instance from raw level components.
* <p>The hour is set to 00:00:00.000.</p>
* @param year year number (may be 0 or negative for BC years)
* @param month month number from 1 to 12
* @param day day number from 1 to 31
* @exception IllegalArgumentException if inconsistent arguments
* are given (parameters out of range, february 29 for non-leap years,
* dates during the gregorian leap in 1582 ...)
*/
public DateTimeComponents(final int year, final int month, final int day)
throws IllegalArgumentException {
this.date = new DateComponents(year, month, day);
this.time = TimeComponents.H00;
}
/** Build an instance from raw level components.
* <p>The hour is set to 00:00:00.000.</p>
* @param year year number (may be 0 or negative for BC years)
* @param month month enumerate
* @param day day number from 1 to 31
* @exception IllegalArgumentException if inconsistent arguments
* are given (parameters out of range, february 29 for non-leap years,
* dates during the gregorian leap in 1582 ...)
*/
public DateTimeComponents(final int year, final Month month, final int day)
throws IllegalArgumentException {
this.date = new DateComponents(year, month, day);
this.time = TimeComponents.H00;
}
/** Build an instance from a seconds offset with respect to another one.
* @param reference reference date/time
* @param offset offset from the reference in seconds
* @see #offsetFrom(DateTimeComponents)
*/
public DateTimeComponents(final DateTimeComponents reference,
final double offset) {
// extract linear data from reference date/time
int day = reference.getDate().getJ2000Day();
double seconds = reference.getTime().getSecondsInLocalDay();
// apply offset
seconds += offset;
// fix range
final int dayShift = (int) FastMath.floor(seconds / Constants.JULIAN_DAY);
seconds -= Constants.JULIAN_DAY * dayShift;
day += dayShift;
final TimeComponents tmpTime = new TimeComponents(seconds);
// set up components
this.date = new DateComponents(day);
this.time = new TimeComponents(tmpTime.getHour(), tmpTime.getMinute(), tmpTime.getSecond(),
reference.getTime().getMinutesFromUTC());
}
/** Parse a string in ISO-8601 format to build a date/time.
* <p>The supported formats are all date formats supported by {@link DateComponents#parseDate(String)}
* and all time formats supported by {@link TimeComponents#parseTime(String)} separated
* by the standard time separator 'T', or date components only (in which case a 00:00:00 hour is
* implied). Typical examples are 2000-01-01T12:00:00Z or 1976W186T210000.
* </p>
* @param string string to parse
* @return a parsed date/time
* @exception IllegalArgumentException if string cannot be parsed
*/
public static DateTimeComponents parseDateTime(final String string) {
// is there a time ?
final int tIndex = string.indexOf('T');
if (tIndex > 0) {
return new DateTimeComponents(DateComponents.parseDate(string.substring(0, tIndex)),
TimeComponents.parseTime(string.substring(tIndex + 1)));
}
return new DateTimeComponents(DateComponents.parseDate(string), TimeComponents.H00);
}
/** Compute the seconds offset between two instances.
* @param dateTime dateTime to subtract from the instance
* @return offset in seconds between the two instants
* (positive if the instance is posterior to the argument)
* @see #DateTimeComponents(DateTimeComponents, double)
*/
public double offsetFrom(final DateTimeComponents dateTime) {
final int dateOffset = date.getJ2000Day() - dateTime.date.getJ2000Day();
final double timeOffset = time.getSecondsInUTCDay() - dateTime.time.getSecondsInUTCDay();
return Constants.JULIAN_DAY * dateOffset + timeOffset;
}
/** Get the date component.
* @return date component
*/
public DateComponents getDate() {
return date;
}
/** Get the time component.
* @return time component
*/
public TimeComponents getTime() {
return time;
}
/** {@inheritDoc} */
public int compareTo(final DateTimeComponents other) {
final int dateComparison = date.compareTo(other.date);
if (dateComparison < 0) {
return -1;
} else if (dateComparison > 0) {
return 1;
}
return time.compareTo(other.time);
}
/** {@inheritDoc} */
public boolean equals(final Object other) {
try {
final DateTimeComponents otherDateTime = (DateTimeComponents) other;
return (otherDateTime != null) &&
date.equals(otherDateTime.date) && time.equals(otherDateTime.time);
} catch (ClassCastException cce) {
return false;
}
}
/** {@inheritDoc} */
public int hashCode() {
return (date.hashCode() << 16) ^ time.hashCode();
}
/** Return a string representation of this pair.
* <p>The format used is ISO8601.</p>
* @return string representation of this pair
*/
public String toString() {
return toString(false);
}
/** Return a string representation of this pair.
* <p>The format used is ISO8601.</p>
* @param inLeap if true the date is a UTC date during a leap second introduction
* @return string representation of this pair
*/
public String toString(final boolean inLeap) {
double second = time.getSecond();
final double wrap = inLeap ? 60.9995 : 59.9995;
if (second >= wrap) {
// we should wrap around next millisecond
int minute = time.getMinute();
int hour = time.getHour();
int j2000 = date.getJ2000Day();
second = 0;
++minute;
if (minute > 59) {
minute = 0;
++hour;
if (hour > 23) {
hour = 0;
++j2000;
}
}
return new DateComponents(j2000).toString() + 'T' + new TimeComponents(hour, minute, second).toString();
}
return date.toString() + 'T' + time.toString();
}
}