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/*
Calimero 2 - A library for KNX network access
Copyright (c) 2006, 2018 B. Malinowsky
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under terms
of your choice, provided that you also meet, for each linked independent
module, the terms and conditions of the license of that module. An
independent module is a module which is not derived from or based on
this library. If you modify this library, you may extend this exception
to your version of the library, but you are not obligated to do so. If
you do not wish to do so, delete this exception statement from your
version.
*/
package tuwien.auto.calimero.datapoint;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import tuwien.auto.calimero.GroupAddress;
import tuwien.auto.calimero.KNXIllegalArgumentException;
import tuwien.auto.calimero.internal.EventListeners;
import tuwien.auto.calimero.xml.KNXMLException;
import tuwien.auto.calimero.xml.XmlReader;
import tuwien.auto.calimero.xml.XmlWriter;
/**
* A datapoint model storing datapoints with no defined order or hierarchy using a map implementation.
*
* @author B. Malinowsky
*/
public class DatapointMap implements DatapointModel, ChangeNotifier
{
private static final String TAG_DATAPOINTS = "datapoints";
private final Map points;
private final EventListeners listeners = new EventListeners<>();
private final Class dpTypeRef;
/**
* Creates a new empty datapoint map.
*/
public DatapointMap()
{
this(Datapoint.class);
}
DatapointMap(final Class type)
{
points = Collections.synchronizedMap(new HashMap<>(20));
dpTypeRef = type;
}
/**
* Creates a new datapoint map and adds all datapoints to the map.
*
* A datapoint to be added has to be unique according its main address, the attempt to
* add two datapoints using the same main address results in a
* KNXIllegalArgumentException.
*
* @param datapoints collection with entries of type {@link Datapoint}
* @throws KNXIllegalArgumentException on duplicate datapoint
*/
public DatapointMap(final Collection datapoints)
{
// not all HashSets put additional capacity in HashSet(Collection) ctor
final Map m = new HashMap<>(Math.max(2 * datapoints.size(), 11));
for (final Iterator i = datapoints.iterator(); i.hasNext();) {
final T dp = i.next();
if (m.containsKey(dp.getMainAddress()))
throw new KNXIllegalArgumentException("duplicate datapoint " + dp.getMainAddress());
m.put(dp.getMainAddress(), dp);
}
points = Collections.synchronizedMap(m);
dpTypeRef = Datapoint.class;
}
@Override
public void add(final T dp)
{
synchronized (points) {
if (points.containsKey(dp.getMainAddress()))
throw new KNXIllegalArgumentException("duplicate datapoint "
+ dp.getMainAddress());
points.put(dp.getMainAddress(), dp);
fireChangeNotification(dp, true);
}
}
@Override
public void remove(final T dp)
{
if (points.remove(dp.getMainAddress()) != null)
fireChangeNotification(dp, false);
}
@Override
public void removeAll()
{
points.clear();
}
@Override
public T get(final GroupAddress main)
{
return points.get(main);
}
// ??? make this a super type interface method
/**
* Returns all datapoints currently contained in this map.
*
*
* @return unmodifiable collection with entries of type {@link Datapoint}
*/
public Collection getDatapoints()
{
return Collections.unmodifiableCollection(points.values());
}
@Override
public boolean contains(final GroupAddress main)
{
return points.containsKey(main);
}
@Override
public boolean contains(final T dp)
{
return points.containsKey(dp.getMainAddress());
}
@Override
public void load(final XmlReader r) throws KNXMLException
{
if (r.getEventType() != XmlReader.START_ELEMENT)
r.nextTag();
if (r.getEventType() != XmlReader.START_ELEMENT || !r.getLocalName().equals(TAG_DATAPOINTS))
throw new KNXMLException(TAG_DATAPOINTS + " element not found", r);
synchronized (points) {
while (r.nextTag() == XmlReader.START_ELEMENT) {
final Datapoint dp = Datapoint.create(r);
if (points.containsKey(dp.getMainAddress()))
throw new KNXMLException("KNX address " + dp.getMainAddress().toString()
+ " in datapoint \"" + dp.getName() + "\" already used", r);
if (!dpTypeRef.isAssignableFrom(dp.getClass()))
throw new KNXMLException("datapoint not of type " + dpTypeRef.getTypeName(), r);
@SuppressWarnings("unchecked")
final T castDp = (T) dp;
points.put(dp.getMainAddress(), castDp);
}
}
}
@Override
public void save(final XmlWriter w) throws KNXMLException
{
w.writeStartElement(TAG_DATAPOINTS);
synchronized (points) {
for (final Iterator i = points.values().iterator(); i.hasNext();)
i.next().save(w);
}
w.writeEndElement();
}
@Override
public void addChangeListener(final ChangeListener l)
{
listeners.add(l);
}
@Override
public void removeChangeListener(final ChangeListener l)
{
listeners.remove(l);
}
private void fireChangeNotification(final T dp, final boolean added)
{
if (added)
listeners.fire(l -> l.onDatapointAdded(this, dp));
else
listeners.fire(l -> l.onDatapointRemoved(this, dp));
}
}