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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* ------------
* Quarter.java
* ------------
* (C) Copyright 2001-2020, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
*/
package org.jfree.data.time;
import java.io.Serializable;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import org.jfree.chart.date.MonthConstants;
import org.jfree.chart.date.SerialDate;
/**
* Defines a quarter (in a given year). The range supported is Q1 1900 to
* Q4 9999. This class is immutable, which is a requirement for all
* {@link RegularTimePeriod} subclasses.
*/
public class Quarter extends RegularTimePeriod implements Serializable {
/** For serialization. */
private static final long serialVersionUID = 3810061714380888671L;
/** Constant for quarter 1. */
public static final int FIRST_QUARTER = 1;
/** Constant for quarter 4. */
public static final int LAST_QUARTER = 4;
/** The first month in each quarter. */
public static final int[] FIRST_MONTH_IN_QUARTER = {
0, MonthConstants.JANUARY, MonthConstants.APRIL, MonthConstants.JULY,
MonthConstants.OCTOBER
};
/** The last month in each quarter. */
public static final int[] LAST_MONTH_IN_QUARTER = {
0, MonthConstants.MARCH, MonthConstants.JUNE, MonthConstants.SEPTEMBER,
MonthConstants.DECEMBER
};
/** The year in which the quarter falls. */
private short year;
/** The quarter (1-4). */
private byte quarter;
/** The first millisecond. */
private long firstMillisecond;
/** The last millisecond. */
private long lastMillisecond;
/**
* Constructs a new Quarter, based on the current system date/time.
* The time zone and locale are determined by the calendar
* returned by {@link RegularTimePeriod#getCalendarInstance()}.
*/
public Quarter() {
this(new Date());
}
/**
* Constructs a new quarter.
* The time zone and locale are determined by the calendar
* returned by {@link RegularTimePeriod#getCalendarInstance()}.
*
* @param year the year (1900 to 9999).
* @param quarter the quarter (1 to 4).
*/
public Quarter(int quarter, int year) {
if ((quarter < FIRST_QUARTER) || (quarter > LAST_QUARTER)) {
throw new IllegalArgumentException("Quarter outside valid range.");
}
this.year = (short) year;
this.quarter = (byte) quarter;
peg(getCalendarInstance());
}
/**
* Constructs a new quarter.
* The time zone and locale are determined by the calendar
* returned by {@link RegularTimePeriod#getCalendarInstance()}.
*
* @param quarter the quarter (1 to 4).
* @param year the year (1900 to 9999).
*/
public Quarter(int quarter, Year year) {
if ((quarter < FIRST_QUARTER) || (quarter > LAST_QUARTER)) {
throw new IllegalArgumentException("Quarter outside valid range.");
}
this.year = (short) year.getYear();
this.quarter = (byte) quarter;
peg(getCalendarInstance());
}
/**
* Constructs a new instance, based on a date/time.
* The time zone and locale are determined by the calendar
* returned by {@link RegularTimePeriod#getCalendarInstance()}.
*
* @param time the date/time ({@code null} not permitted).
*
* @see #Quarter(Date, TimeZone, Locale)
*/
public Quarter(Date time) {
this(time, getCalendarInstance());
}
/**
* Creates a new {@code Quarter} instance, using the specified
* zone and locale.
*
* @param time the current time.
* @param zone the time zone.
* @param locale the locale.
*
* @since 1.0.12
*/
public Quarter(Date time, TimeZone zone, Locale locale) {
Calendar calendar = Calendar.getInstance(zone, locale);
calendar.setTime(time);
int month = calendar.get(Calendar.MONTH) + 1;
this.quarter = (byte) SerialDate.monthCodeToQuarter(month);
this.year = (short) calendar.get(Calendar.YEAR);
peg(calendar);
}
/**
* Constructs a new instance, based on a particular date/time.
* The time zone and locale are determined by the {@code calendar}
* parameter.
*
* @param time the date/time ({@code null} not permitted).
* @param calendar the calendar to use for calculations ({@code null} not permitted).
*/
public Quarter(Date time, Calendar calendar) {
calendar.setTime(time);
int month = calendar.get(Calendar.MONTH) + 1;
this.quarter = (byte) SerialDate.monthCodeToQuarter(month);
this.year = (short) calendar.get(Calendar.YEAR);
peg(calendar);
}
/**
* Returns the quarter.
*
* @return The quarter.
*/
public int getQuarter() {
return this.quarter;
}
/**
* Returns the year.
*
* @return The year.
*/
public Year getYear() {
return new Year(this.year);
}
/**
* Returns the year.
*
* @return The year.
*
* @since 1.0.3
*/
public int getYearValue() {
return this.year;
}
/**
* Returns the first millisecond of the quarter. This will be determined
* relative to the time zone specified in the constructor, or in the
* calendar instance passed in the most recent call to the
* {@link #peg(Calendar)} method.
*
* @return The first millisecond of the quarter.
*
* @see #getLastMillisecond()
*/
@Override
public long getFirstMillisecond() {
return this.firstMillisecond;
}
/**
* Returns the last millisecond of the quarter. This will be
* determined relative to the time zone specified in the constructor, or
* in the calendar instance passed in the most recent call to the
* {@link #peg(Calendar)} method.
*
* @return The last millisecond of the quarter.
*
* @see #getFirstMillisecond()
*/
@Override
public long getLastMillisecond() {
return this.lastMillisecond;
}
/**
* Recalculates the start date/time and end date/time for this time period
* relative to the supplied calendar (which incorporates a time zone).
*
* @param calendar the calendar ({@code null} not permitted).
*
* @since 1.0.3
*/
@Override
public void peg(Calendar calendar) {
this.firstMillisecond = getFirstMillisecond(calendar);
this.lastMillisecond = getLastMillisecond(calendar);
}
/**
* Returns the quarter preceding this one.
* No matter what time zone and locale this instance was created with,
* the returned instance will use the default calendar for time
* calculations, obtained with {@link RegularTimePeriod#getCalendarInstance()}.
*
* @return The quarter preceding this one (or {@code null} if this is
* Q1 1900).
*/
@Override
public RegularTimePeriod previous() {
Quarter result;
if (this.quarter > FIRST_QUARTER) {
result = new Quarter(this.quarter - 1, this.year);
}
else {
if (this.year > 1900) {
result = new Quarter(LAST_QUARTER, this.year - 1);
}
else {
result = null;
}
}
return result;
}
/**
* Returns the quarter following this one.
* No matter what time zone and locale this instance was created with,
* the returned instance will use the default calendar for time
* calculations, obtained with {@link RegularTimePeriod#getCalendarInstance()}.
*
* @return The quarter following this one (or null if this is Q4 9999).
*/
@Override
public RegularTimePeriod next() {
Quarter result;
if (this.quarter < LAST_QUARTER) {
result = new Quarter(this.quarter + 1, this.year);
}
else {
if (this.year < 9999) {
result = new Quarter(FIRST_QUARTER, this.year + 1);
}
else {
result = null;
}
}
return result;
}
/**
* Returns a serial index number for the quarter.
*
* @return The serial index number.
*/
@Override
public long getSerialIndex() {
return this.year * 4L + this.quarter;
}
/**
* Tests the equality of this Quarter object to an arbitrary object.
* Returns {@code true} if the target is a Quarter instance
* representing the same quarter as this object. In all other cases,
* returns {@code false}.
*
* @param obj the object ({@code null} permitted).
*
* @return {@code true} if quarter and year of this and the object are
* the same.
*/
@Override
public boolean equals(Object obj) {
if (obj != null) {
if (obj instanceof Quarter) {
Quarter target = (Quarter) obj;
return (this.quarter == target.getQuarter()
&& (this.year == target.getYearValue()));
}
else {
return false;
}
}
else {
return false;
}
}
/**
* Returns a hash code for this object instance. The approach described by
* Joshua Bloch in "Effective Java" has been used here:
*
* {@code http://developer.java.sun.com/developer/Books/effectivejava
* /Chapter3.pdf}
*
* @return A hash code.
*/
@Override
public int hashCode() {
int result = 17;
result = 37 * result + this.quarter;
result = 37 * result + this.year;
return result;
}
/**
* Returns an integer indicating the order of this Quarter object relative
* to the specified object:
*
* negative == before, zero == same, positive == after.
*
* @param o1 the object to compare
*
* @return negative == before, zero == same, positive == after.
*/
@Override
public int compareTo(Object o1) {
int result;
// CASE 1 : Comparing to another Quarter object
// --------------------------------------------
if (o1 instanceof Quarter) {
Quarter q = (Quarter) o1;
result = this.year - q.getYearValue();
if (result == 0) {
result = this.quarter - q.getQuarter();
}
}
// CASE 2 : Comparing to another TimePeriod object
// -----------------------------------------------
else if (o1 instanceof RegularTimePeriod) {
// more difficult case - evaluate later...
result = 0;
}
// CASE 3 : Comparing to a non-TimePeriod object
// ---------------------------------------------
else {
// consider time periods to be ordered after general objects
result = 1;
}
return result;
}
/**
* Returns a string representing the quarter (e.g. "Q1/2002").
*
* @return A string representing the quarter.
*/
@Override
public String toString() {
return "Q" + this.quarter + "/" + this.year;
}
/**
* Returns the first millisecond in the Quarter, evaluated using the
* supplied calendar (which determines the time zone).
*
* @param calendar the calendar ({@code null} not permitted).
*
* @return The first millisecond in the Quarter.
*
* @throws NullPointerException if {@code calendar} is
* {@code null}.
*/
@Override
public long getFirstMillisecond(Calendar calendar) {
int month = Quarter.FIRST_MONTH_IN_QUARTER[this.quarter];
calendar.set(this.year, month - 1, 1, 0, 0, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTimeInMillis();
}
/**
* Returns the last millisecond of the Quarter, evaluated using the
* supplied calendar (which determines the time zone).
*
* @param calendar the calendar ({@code null} not permitted).
*
* @return The last millisecond of the Quarter.
*
* @throws NullPointerException if {@code calendar} is
* {@code null}.
*/
@Override
public long getLastMillisecond(Calendar calendar) {
int month = Quarter.LAST_MONTH_IN_QUARTER[this.quarter];
int eom = SerialDate.lastDayOfMonth(month, this.year);
calendar.set(this.year, month - 1, eom, 23, 59, 59);
calendar.set(Calendar.MILLISECOND, 999);
return calendar.getTimeInMillis();
}
/**
* Parses the string argument as a quarter.
*
* This method should accept the following formats: "YYYY-QN" and "QN-YYYY",
* where the "-" can be a space, a forward-slash (/), comma or a dash (-).
* @param s A string representing the quarter.
*
* @return The quarter.
*/
public static Quarter parseQuarter(String s) {
// find the Q and the integer following it (remove both from the
// string)...
int i = s.indexOf("Q");
if (i == -1) {
throw new TimePeriodFormatException("Missing Q.");
}
if (i == s.length() - 1) {
throw new TimePeriodFormatException("Q found at end of string.");
}
String qstr = s.substring(i + 1, i + 2);
int quarter = Integer.parseInt(qstr);
String remaining = s.substring(0, i) + s.substring(i + 2, s.length());
// replace any / , or - with a space
remaining = remaining.replace('/', ' ');
remaining = remaining.replace(',', ' ');
remaining = remaining.replace('-', ' ');
// parse the string...
Year year = Year.parseYear(remaining.trim());
Quarter result = new Quarter(quarter, year);
return result;
}
}