/*
This file is part of RouteConverter.
RouteConverter is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
RouteConverter 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with RouteConverter; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Copyright (C) 2007 Christian Pesch. All Rights Reserved.
*/
package slash.navigation.converter.gui.helpers;
import slash.common.type.CompactCalendar;
import slash.navigation.common.NavigationPosition;
import slash.navigation.base.RouteCharacteristics;
import slash.navigation.converter.gui.RouteConverter;
import slash.navigation.converter.gui.mapview.AbstractMapViewListener;
import slash.navigation.converter.gui.models.CharacteristicsModel;
import slash.navigation.converter.gui.models.PositionsModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Logger;
import static java.lang.Math.max;
import static java.lang.System.currentTimeMillis;
import static javax.swing.event.ListDataEvent.CONTENTS_CHANGED;
import static javax.swing.event.TableModelEvent.ALL_COLUMNS;
import static javax.swing.event.TableModelEvent.UPDATE;
import static slash.common.helpers.ThreadHelper.safeJoin;
import static slash.navigation.base.RouteCharacteristics.Route;
import static slash.navigation.base.RouteCharacteristics.Waypoints;
import static slash.navigation.converter.gui.models.CharacteristicsModel.IGNORE;
import static slash.navigation.converter.gui.models.PositionColumns.LATITUDE_COLUMN_INDEX;
import static slash.navigation.converter.gui.models.PositionColumns.LONGITUDE_COLUMN_INDEX;
import static slash.navigation.gui.helpers.JTableHelper.isFirstToLastRow;
/**
* Helps to calculate the length of position list of type route and track.
*
* @author Christian Pesch
*/
public class LengthCalculator {
private static final Logger log = Logger.getLogger(LengthCalculator.class.getName());
private PositionsModel positionsModel;
private Thread lengthCalculator;
private final Object notificationMutex = new Object();
private boolean running = true, recalculate = false;
public LengthCalculator() {
initialize();
}
private RouteCharacteristics getCharacteristics() {
return positionsModel.getRoute().getCharacteristics();
}
public void initialize(PositionsModel positionsModel, CharacteristicsModel characteristicsModel) {
this.positionsModel = positionsModel;
positionsModel.addTableModelListener(new TableModelListener() {
public void tableChanged(TableModelEvent e) {
// ignored updates on columns not relevant for length calculation
if (e.getType() == UPDATE &&
!isFirstToLastRow(e) &&
!(e.getColumn() == LONGITUDE_COLUMN_INDEX ||
e.getColumn() == LATITUDE_COLUMN_INDEX ||
e.getColumn() == ALL_COLUMNS))
return;
if (LengthCalculator.this.positionsModel.isContinousRange())
return;
calculateDistance();
}
});
characteristicsModel.addListDataListener(new AbstractListDataListener() {
public void process(ListDataEvent e) {
// ignore events following setRoute()
if (e.getType() == CONTENTS_CHANGED && e.getIndex0() == IGNORE && e.getIndex1() == IGNORE)
return;
calculateDistance();
}
});
RouteConverter.getInstance().addMapViewListener(new AbstractMapViewListener() {
public void calculatedDistance(int meters, int seconds) {
fireCalculatedDistance(meters, seconds);
}
});
}
private final List<LengthCalculatorListener> lengthCalculatorListeners = new CopyOnWriteArrayList<>();
public void addLengthCalculatorListener(LengthCalculatorListener listener) {
lengthCalculatorListeners.add(listener);
}
private void fireCalculatedDistance(int meters, int seconds) {
for (LengthCalculatorListener listener : lengthCalculatorListeners) {
listener.calculatedDistance(meters, seconds);
}
}
private void calculateDistance() {
if (getCharacteristics().equals(Waypoints)) {
fireCalculatedDistance(0, 0);
return;
}
if (getCharacteristics().equals(Route) && RouteConverter.getInstance().isMapViewInitialized())
return;
synchronized (notificationMutex) {
recalculate = true;
notificationMutex.notifyAll();
}
}
private void recalculateDistance() {
fireCalculatedDistance(0, 0);
double distanceMeters = 0.0;
long totalTimeMilliSeconds = 0;
CompactCalendar minimumTime = null, maximumTime = null;
NavigationPosition previous = null;
for (int i = 0; i < positionsModel.getRowCount(); i++) {
NavigationPosition next = positionsModel.getPosition(i);
if (previous != null) {
Double distance = previous.calculateDistance(next);
if (distance != null)
distanceMeters += distance;
Long time = previous.calculateTime(next);
if (time != null && time > 0)
totalTimeMilliSeconds += time;
}
CompactCalendar time = next.getTime();
if (time != null) {
if (minimumTime == null || time.before(minimumTime))
minimumTime = time;
if (maximumTime == null || time.after(maximumTime))
maximumTime = time;
}
if (i > 0 && i % 100 == 0)
fireCalculatedDistance((int) distanceMeters, totalTimeMilliSeconds > 0 ? (int) (totalTimeMilliSeconds / 1000) : 0);
previous = next;
}
long summedUp = totalTimeMilliSeconds > 0 ? totalTimeMilliSeconds / 1000 : 0;
long maxMinusMin = minimumTime != null ? (maximumTime.getTimeInMillis() - minimumTime.getTimeInMillis()) / 1000 : 0;
fireCalculatedDistance((int) distanceMeters, (int) max(maxMinusMin, summedUp));
}
private void initialize() {
lengthCalculator = new Thread(new Runnable() {
public void run() {
while (true) {
synchronized (notificationMutex) {
try {
notificationMutex.wait(1000);
} catch (InterruptedException e) {
// ignore this
}
if (!running)
return;
if (!recalculate)
continue;
recalculate = false;
}
recalculateDistance();
}
}
}, "LengthCalculator");
lengthCalculator.start();
}
public void dispose() {
long start = currentTimeMillis();
synchronized (notificationMutex) {
running = false;
notificationMutex.notifyAll();
}
if (lengthCalculator != null) {
try {
safeJoin(lengthCalculator);
} catch (InterruptedException e) {
// intentionally left empty
}
long end = currentTimeMillis();
log.info("LengthCalculator stopped after " + (end - start) + " ms");
}
}
}