/**
* DateTimeToCalendarHelper.java
*
* Copyright (c) 2011-2014, JFXtras
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the organization nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package jfxtras.internal.scene.control.skin;
import java.text.DateFormat;
import java.text.FieldPosition;
import java.text.ParsePosition;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
import java.util.WeakHashMap;
import javafx.beans.property.ListProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
/**
*
* @author user
*/
public class DateTimeToCalendarHelper {
/**
*
* @param localDate
* @return
*/
public static Calendar createCalendarFromLocalDate(LocalDate localDate, Locale locale)
{
if (localDate == null) return null;
Calendar lCalendar = Calendar.getInstance(locale);
lCalendar.set(Calendar.YEAR, localDate.getYear());
lCalendar.set(Calendar.MONTH, localDate.getMonth().getValue() - 1);
lCalendar.set(Calendar.DATE, localDate.getDayOfMonth());
lCalendar.set(Calendar.HOUR_OF_DAY, 0);
lCalendar.set(Calendar.MINUTE, 0);
lCalendar.set(Calendar.SECOND, 0);
lCalendar.set(Calendar.MILLISECOND, 0);
return lCalendar;
}
/**
*
* @param localDateTime
* @return
*/
public static Calendar createCalendarFromLocalDateTime(LocalDateTime localDateTime, Locale locale)
{
if (localDateTime == null) return null;
Calendar lCalendar = Calendar.getInstance(locale);
lCalendar.set(Calendar.YEAR, localDateTime.getYear());
lCalendar.set(Calendar.MONTH, localDateTime.getMonth().getValue() - 1);
lCalendar.set(Calendar.DATE, localDateTime.getDayOfMonth());
lCalendar.set(Calendar.HOUR_OF_DAY, localDateTime.getHour());
lCalendar.set(Calendar.MINUTE, localDateTime.getMinute());
lCalendar.set(Calendar.SECOND, localDateTime.getSecond());
lCalendar.set(Calendar.MILLISECOND, localDateTime.getNano() / 1000000);
return lCalendar;
}
/**
*
* @param localTime
* @return
*/
public static Calendar createCalendarFromLocalTime(LocalTime localTime, Locale locale)
{
if (localTime == null) return null;
Calendar lCalendar = Calendar.getInstance(locale);
lCalendar.set(Calendar.HOUR_OF_DAY, localTime.getHour());
lCalendar.set(Calendar.MINUTE, localTime.getMinute());
lCalendar.set(Calendar.SECOND, localTime.getSecond());
lCalendar.set(Calendar.MILLISECOND, localTime.getNano() / 1000000);
return lCalendar;
}
/**
*
* @param calendar
* @return
*/
public static LocalDate createLocalDateFromCalendar(Calendar calendar)
{
if (calendar == null) return null;
LocalDate lLocalDate = LocalDate.of(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH) + 1, calendar.get(Calendar.DATE));
return lLocalDate;
}
/**
*
* @param calendar
* @return
*/
public static LocalDateTime createLocalDateTimeFromCalendar(Calendar calendar)
{
if (calendar == null) return null;
LocalDateTime lLocalDateTime = LocalDateTime.of(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH) + 1, calendar.get(Calendar.DATE), calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE), calendar.get(Calendar.SECOND), calendar.get(Calendar.MILLISECOND) * 1000000);
return lLocalDateTime;
}
/**
*
* @param calendar
* @return
*/
public static LocalTime createLocalTimeFromCalendar(Calendar calendar)
{
if (calendar == null) return null;
LocalTime lLocalTime = LocalTime.of(calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE), calendar.get(Calendar.SECOND), calendar.get(Calendar.MILLISECOND) * 1000000);
return lLocalTime;
}
/*
*
*/
public static Date createDateFromLocalDate(LocalDate localDate) {
if (localDate == null) {
return null;
}
Instant lInstant = localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant();
Date lDate = Date.from(lInstant);
return lDate;
}
/**
*
*/
public static LocalDate createLocaleDateFromDate(Date date) {
if (date == null) {
return null;
}
LocalDate lLocalDate = LocalDateTime.ofInstant( date.toInstant(), ZoneId.systemDefault() ).toLocalDate();
return lLocalDate;
}
/*
*
*/
public static Date createDateFromLocalDateTime(LocalDateTime localDateTime) {
if (localDateTime == null) {
return null;
}
Instant lInstant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
Date lDate = Date.from(lInstant);
return lDate;
}
/**
*
*/
public static LocalDateTime createLocaleDateTimeFromDate(Date date) {
if (date == null) {
return null;
}
// This gives strange results, for example: Sun Jan 01 02:02:02 CET 1111 -> 1111-01-08T01:55:30
// LocalDateTime lLocalDateTime = LocalDateTime.ofInstant( date.toInstant(), ZoneId.systemDefault() );
LocalDateTime lLocalDateTime = LocalDateTime.of(1900 + date.getYear(), date.getMonth() + 1, date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());
return lLocalDateTime;
}
/**
*
*/
public static LocalTime createLocaleTimeFromDate(Date date) {
if (date == null) {
return null;
}
LocalTime lLocalTime = LocalTime.of( date.getHours(), date.getMinutes(), date.getSeconds(), 0 );
return lLocalTime;
}
/*
*
*/
public static Date createDateFromLocalTime(LocalTime localTime) {
if (localTime == null) {
return null;
}
Date lDate = createDateFromLocalDateTime( localTime.atDate(LocalDate.now()) );
return lDate;
}
/**
*
* @param calendarProperty
* @param localDateProperty
* @param localeProperty
*/
static public void syncLocalDate(ObjectProperty<Calendar> calendarProperty, ObjectProperty<LocalDate> localDateProperty, ObjectProperty<Locale> localeProperty)
{
// initial
calendarProperty.set(localDateProperty.get() == null ? null : createCalendarFromLocalDate(localDateProperty.get(), localeProperty.get()));
// forward changes from calendar
calendarProperty.addListener( (ObservableValue<? extends Calendar> observableValue, Calendar oldValue, Calendar newValue) -> {
localDateProperty.set(createLocalDateFromCalendar(newValue));
});
// forward changes to calendar
localDateProperty.addListener( (ObservableValue<? extends LocalDate> observableValue, LocalDate oldValue, LocalDate newValue) -> {
calendarProperty.set(newValue == null ? null : createCalendarFromLocalDate(newValue, localeProperty.get()));
});
}
/**
*
* @param calendarProperty
* @param localDateTimeProperty
* @param localeProperty
*/
static public void syncLocalDateTime(ObjectProperty<Calendar> calendarProperty, ObjectProperty<LocalDateTime> localDateTimeProperty, ObjectProperty<Locale> localeProperty)
{
// initial
calendarProperty.set(localDateTimeProperty.get() == null ? null : createCalendarFromLocalDateTime(localDateTimeProperty.get(), localeProperty.get()));
// forward changes from calendar
calendarProperty.addListener( (ObservableValue<? extends Calendar> observableValue, Calendar oldValue, Calendar newValue) -> {
localDateTimeProperty.set(createLocalDateTimeFromCalendar(newValue));
});
// forward changes to calendar
localDateTimeProperty.addListener( (ObservableValue<? extends LocalDateTime> observableValue, LocalDateTime oldValue, LocalDateTime newValue) -> {
calendarProperty.set(newValue == null ? null : createCalendarFromLocalDateTime(newValue, localeProperty.get()));
});
}
/**
*
* @param calendarProperty
* @param localTimeProperty
* @param localeProperty
*/
static public void syncLocalTime(ObjectProperty<Calendar> calendarProperty, ObjectProperty<LocalTime> localTimeProperty, ObjectProperty<Locale> localeProperty)
{
// initial
calendarProperty.set(localTimeProperty.get() == null ? null : createCalendarFromLocalTime(localTimeProperty.get(), localeProperty.get()));
// forward changes from calendar
calendarProperty.addListener( (ObservableValue<? extends Calendar> observableValue, Calendar oldValue, Calendar newValue) -> {
localTimeProperty.set(createLocalTimeFromCalendar(newValue));
});
// forward changes to calendar
localTimeProperty.addListener( (ObservableValue<? extends LocalTime> observableValue, LocalTime oldValue, LocalTime newValue) -> {
calendarProperty.set(newValue == null ? null : createCalendarFromLocalTime(newValue, localeProperty.get()));
});
}
/**
*
* @param calendars
* @param localDates
* @param localeProperty
*/
static public void syncLocalDates(ObservableList<Calendar> calendars, ObservableList<LocalDate> localDates, ObjectProperty<Locale> localeProperty)
{
// initial values
for (LocalDate lLocalDate : localDates) {
Calendar lCalendar = createCalendarFromLocalDate(lLocalDate, localeProperty.get());
calendars.add(lCalendar);
}
// forward changes from calendar
calendars.addListener( (ListChangeListener.Change<? extends Calendar> change) -> {
while (change.next())
{
for (Calendar lCalendar : change.getRemoved())
{
LocalDate lLocalDate = createLocalDateFromCalendar(lCalendar);
if (localDates.contains(lLocalDate)) {
localDates.remove(lLocalDate);
}
}
for (Calendar lCalendar : change.getAddedSubList())
{
LocalDate lLocalDate = createLocalDateFromCalendar(lCalendar);
if (localDates.contains(lLocalDate) == false) {
localDates.add(lLocalDate);
}
}
}
});
// forward changes to calendar
localDates.addListener( (ListChangeListener.Change<? extends LocalDate> change) -> {
while (change.next()) {
for (LocalDate lLocalDate : change.getRemoved()) {
Calendar lCalendar = createCalendarFromLocalDate(lLocalDate, localeProperty.get());
if (calendars.contains(lCalendar)) {
calendars.remove(lCalendar);
}
}
for (LocalDate lLocalDate : change.getAddedSubList()) {
Calendar lCalendar = createCalendarFromLocalDate(lLocalDate, localeProperty.get());
if (calendars.contains(lCalendar) == false) {
calendars.add(lCalendar);
}
}
}
});
}
/**
*
* @param calendars
* @param localDateTimes
* @param localeProperty
*/
static public void syncLocalDateTimes(ObservableList<Calendar> calendars, ObservableList<LocalDateTime> localDateTimes, ObjectProperty<Locale> localeProperty)
{
// initial values
for (LocalDateTime lLocalDateTime : localDateTimes) {
Calendar lCalendar = createCalendarFromLocalDateTime(lLocalDateTime, localeProperty.get());
calendars.add(lCalendar);
}
// forward changes from calendar
calendars.addListener( (ListChangeListener.Change<? extends Calendar> change) -> {
while (change.next())
{
for (Calendar lCalendar : change.getRemoved())
{
LocalDateTime lLocalDateTime = createLocalDateTimeFromCalendar(lCalendar);
if (localDateTimes.contains(lLocalDateTime)) {
localDateTimes.remove(lLocalDateTime);
}
}
for (Calendar lCalendar : change.getAddedSubList())
{
LocalDateTime lLocalDateTime = createLocalDateTimeFromCalendar(lCalendar);
if (localDateTimes.contains(lLocalDateTime) == false) {
localDateTimes.add(lLocalDateTime);
}
}
}
});
// forward changes to calendar
localDateTimes.addListener( (ListChangeListener.Change<? extends LocalDateTime> change) -> {
while (change.next()) {
for (LocalDateTime lLocalDateTime : change.getRemoved()) {
Calendar lCalendar = createCalendarFromLocalDateTime(lLocalDateTime, localeProperty.get());
if (calendars.contains(lCalendar)) {
calendars.remove(lCalendar);
}
}
for (LocalDateTime lLocalDateTime : change.getAddedSubList()) {
Calendar lCalendar = createCalendarFromLocalDateTime(lLocalDateTime, localeProperty.get());
if (calendars.contains(lCalendar) == false) {
calendars.add(lCalendar);
}
}
}
});
}
// -------
// DateTimeFormatterForDate
static public void syncDateTimeFormatterForDate(ObjectProperty<DateFormat> dateFormatProperty, ObjectProperty<DateTimeFormatter> dateTimeFormatterProperty) {
dateFormatProperty.set( dateTimeFormatterProperty.get() == null ? null : new DateTimeFormatterToDateFormatWrapper( dateTimeFormatterProperty.get() ));
dateTimeFormatterProperty.addListener( (observable) -> {
dateFormatProperty.set( new DateTimeFormatterToDateFormatWrapper( dateTimeFormatterProperty.get() ));
});
}
static public void syncDateTimeFormattersForDate(ListProperty<DateFormat> dateFormatsProperty, ListProperty<DateTimeFormatter> dateTimeFormattersProperty) {
final Map<DateTimeFormatter, DateTimeFormatterToDateFormatWrapper> map = new WeakHashMap<>();
// initial values
for (DateTimeFormatter lDateTimeFormatter : dateTimeFormattersProperty) {
DateTimeFormatterToDateFormatWrapper lDateTimeFormatterToDateFormatWrapper = new DateTimeFormatterToDateFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToDateFormatWrapper);
dateFormatsProperty.add( lDateTimeFormatterToDateFormatWrapper );
}
// forward changes from localDate
dateTimeFormattersProperty.addListener( (ListChangeListener.Change<? extends DateTimeFormatter> change) -> {
while (change.next())
{
for (DateTimeFormatter lDateTimeFormatter : change.getRemoved())
{
DateTimeFormatterToDateFormatWrapper lDateTimeFormatterToDateFormatWrapper = map.remove(lDateTimeFormatter);
dateFormatsProperty.remove(lDateTimeFormatterToDateFormatWrapper);
}
for (DateTimeFormatter lDateTimeFormatter : change.getAddedSubList())
{
DateTimeFormatterToDateFormatWrapper lDateTimeFormatterToDateFormatWrapper = new DateTimeFormatterToDateFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToDateFormatWrapper);
dateFormatsProperty.add(lDateTimeFormatterToDateFormatWrapper);
}
}
});
}
/**
*
*/
static class DateTimeFormatterToDateFormatWrapper extends DateFormat {
public DateTimeFormatterToDateFormatWrapper(DateTimeFormatter dateTimeFormatter) {
this.dateTimeFormatter = dateTimeFormatter;
}
final private DateTimeFormatter dateTimeFormatter;
@Override
public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
LocalDate lLocalDate = createLocaleDateFromDate(date);
String s = this.dateTimeFormatter.format( lLocalDate );
toAppendTo.append(s);
return toAppendTo;
}
@Override
public Date parse(String source, ParsePosition pos) {
LocalDate lLocalDate = LocalDate.parse(source, this.dateTimeFormatter);
Date lDate = createDateFromLocalDate(lLocalDate);
pos.setIndex(source.length()); // otherwise DateFormat will thrown an exception
return lDate;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
return (this == obj);
}
public String toString() {
return dateTimeFormatter.toString();
}
}
// -------
// DateTimeFormatterForDateTime
static public void syncDateTimeFormatterForDateTime(ObjectProperty<DateFormat> dateFormatProperty, ObjectProperty<DateTimeFormatter> dateTimeFormatterProperty) {
dateFormatProperty.set( dateTimeFormatterProperty.get() == null ? null : new DateTimeFormatterToDateTimeFormatWrapper( dateTimeFormatterProperty.get() ));
dateTimeFormatterProperty.addListener( (observable) -> {
dateFormatProperty.set( new DateTimeFormatterToDateTimeFormatWrapper( dateTimeFormatterProperty.get() ));
});
}
static public void syncDateTimeFormattersForDateTime(ListProperty<DateFormat> dateFormatsProperty, ListProperty<DateTimeFormatter> dateTimeFormattersProperty) {
final Map<DateTimeFormatter, DateTimeFormatterToDateTimeFormatWrapper> map = new WeakHashMap<>();
// initial values
for (DateTimeFormatter lDateTimeFormatter : dateTimeFormattersProperty) {
DateTimeFormatterToDateTimeFormatWrapper lDateTimeFormatterToDateTimeFormatWrapper = new DateTimeFormatterToDateTimeFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToDateTimeFormatWrapper);
dateFormatsProperty.add( lDateTimeFormatterToDateTimeFormatWrapper );
}
// forward changes from localDate
dateTimeFormattersProperty.addListener( (ListChangeListener.Change<? extends DateTimeFormatter> change) -> {
while (change.next())
{
for (DateTimeFormatter lDateTimeFormatter : change.getRemoved())
{
DateTimeFormatterToDateTimeFormatWrapper lDateTimeFormatterToDateTimeFormatWrapper = map.remove(lDateTimeFormatter);
dateFormatsProperty.remove(lDateTimeFormatterToDateTimeFormatWrapper);
}
for (DateTimeFormatter lDateTimeFormatter : change.getAddedSubList())
{
DateTimeFormatterToDateTimeFormatWrapper lDateTimeFormatterToDateTimeFormatWrapper = new DateTimeFormatterToDateTimeFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToDateTimeFormatWrapper);
dateFormatsProperty.add(lDateTimeFormatterToDateTimeFormatWrapper);
}
}
});
}
/**
*
*/
static class DateTimeFormatterToDateTimeFormatWrapper extends DateFormat {
public DateTimeFormatterToDateTimeFormatWrapper(DateTimeFormatter dateTimeFormatter) {
this.dateTimeFormatter = dateTimeFormatter;
}
final private DateTimeFormatter dateTimeFormatter;
@Override
public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
LocalDateTime lLocalDateTime = createLocaleDateTimeFromDate(date);
String s = this.dateTimeFormatter.format( lLocalDateTime );
toAppendTo.append(s);
return toAppendTo;
}
@Override
public Date parse(String source, ParsePosition pos) {
LocalDateTime lLocalDateTime = LocalDateTime.parse(source, this.dateTimeFormatter);
Date lDate = createDateFromLocalDateTime(lLocalDateTime);
pos.setIndex(source.length()); // otherwise DateFormat will thrown an exception
return lDate;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
return (this == obj);
}
public String toString() {
return dateTimeFormatter.toString();
}
}
// -------
// DateTimeFormatterForTime
static public void syncDateTimeFormatterForTime(ObjectProperty<DateFormat> dateFormatProperty, ObjectProperty<DateTimeFormatter> dateTimeFormatterProperty) {
dateFormatProperty.set( dateTimeFormatterProperty.get() == null ? null : new DateTimeFormatterToTimeFormatWrapper( dateTimeFormatterProperty.get() ));
dateTimeFormatterProperty.addListener( (observable) -> {
dateFormatProperty.set( new DateTimeFormatterToTimeFormatWrapper( dateTimeFormatterProperty.get() ));
});
}
static public void syncDateTimeFormattersForTime(ListProperty<DateFormat> dateFormatsProperty, ListProperty<DateTimeFormatter> dateTimeFormattersProperty) {
final Map<DateTimeFormatter, DateTimeFormatterToTimeFormatWrapper> map = new WeakHashMap<>();
// initial values
for (DateTimeFormatter lDateTimeFormatter : dateTimeFormattersProperty) {
DateTimeFormatterToTimeFormatWrapper lDateTimeFormatterToTimeFormatWrapper = new DateTimeFormatterToTimeFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToTimeFormatWrapper);
dateFormatsProperty.add( lDateTimeFormatterToTimeFormatWrapper );
}
// forward changes from localDate
dateTimeFormattersProperty.addListener( (ListChangeListener.Change<? extends DateTimeFormatter> change) -> {
while (change.next())
{
for (DateTimeFormatter lDateTimeFormatter : change.getRemoved())
{
DateTimeFormatterToTimeFormatWrapper lDateTimeFormatterToTimeFormatWrapper = map.remove(lDateTimeFormatter);
dateFormatsProperty.remove(lDateTimeFormatterToTimeFormatWrapper);
}
for (DateTimeFormatter lDateTimeFormatter : change.getAddedSubList())
{
DateTimeFormatterToTimeFormatWrapper lDateTimeFormatterToTimeFormatWrapper = new DateTimeFormatterToTimeFormatWrapper( lDateTimeFormatter );
map.put(lDateTimeFormatter, lDateTimeFormatterToTimeFormatWrapper);
dateFormatsProperty.add(lDateTimeFormatterToTimeFormatWrapper);
}
}
});
}
/**
*
*/
static class DateTimeFormatterToTimeFormatWrapper extends DateFormat {
public DateTimeFormatterToTimeFormatWrapper(DateTimeFormatter dateTimeFormatter) {
this.dateTimeFormatter = dateTimeFormatter;
}
final private DateTimeFormatter dateTimeFormatter;
@Override
public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
LocalTime lLocalTime = createLocaleTimeFromDate(date);
String s = this.dateTimeFormatter.format( lLocalTime );
toAppendTo.append(s);
return toAppendTo;
}
@Override
public Date parse(String source, ParsePosition pos) {
LocalTime lLocalTime = LocalTime.parse(source, this.dateTimeFormatter);
Date lDate = createDateFromLocalTime(lLocalTime);
pos.setIndex(source.length()); // otherwise DateFormat will thrown an exception
return lDate;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
return (this == obj);
}
public String toString() {
return dateTimeFormatter.toString();
}
}
static public void sync(ObservableList<Calendar> calendars, ObservableList<Calendar> localDateTimes)
{
// initial values
for (Calendar lCalendar : localDateTimes) {
calendars.add(lCalendar);
}
// forward changes from calendar
calendars.addListener( (ListChangeListener.Change<? extends Calendar> change) -> {
while (change.next())
{
for (Calendar lCalendar : change.getRemoved())
{
if (localDateTimes.contains(lCalendar)) {
localDateTimes.remove(lCalendar);
}
}
for (Calendar lCalendar : change.getAddedSubList())
{
if (localDateTimes.contains(lCalendar) == false) {
localDateTimes.add(lCalendar);
}
}
}
});
// forward changes to calendar
localDateTimes.addListener( (ListChangeListener.Change<? extends Calendar> change) -> {
while (change.next()) {
for (Calendar lCalendar : change.getRemoved()) {
if (calendars.contains(lCalendar)) {
calendars.remove(lCalendar);
}
}
for (Calendar lCalendar : change.getAddedSubList()) {
if (calendars.contains(lCalendar) == false) {
calendars.add(lCalendar);
}
}
}
});
}
}