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/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Distributable under LGPL license.
* See terms of license at gnu.org.
*/
package net.java.sip.communicator.service.gui.event;
import java.util.*;
import net.java.sip.communicator.service.contactlist.*;
/**
* The <tt>MetaContactQuery</tt> corresponds to a particular query made through
* the <tt>MetaContactListSource</tt>. Each query once started could be
* canceled. One could also register a listener in order to be notified for
* changes in query status and query contact results.
*
* @author Yana Stamcheva
*/
public class MetaContactQuery
{
private boolean isCanceled = false;
private int resultCount = 0;
/**
* A list of all registered query listeners.
*/
private final List<MetaContactQueryListener> queryListeners
= new LinkedList<MetaContactQueryListener>();
/**
* Cancels this query.
*/
public void cancel()
{
isCanceled = true;
queryListeners.clear();
}
/**
* Returns <tt>true</tt> if this query has been canceled, otherwise returns
* <tt>false</tt>.
* @return <tt>true</tt> if this query has been canceled, otherwise returns
* <tt>false</tt>.
*/
public boolean isCanceled()
{
return isCanceled;
}
/**
* Returns the current number of results received for this query.
* @return the current number of results received for this query
*/
public int getResultCount()
{
return resultCount;
}
/**
* Sets the result count of this query. This method is meant to be used to
* set the initial result count which is before firing any events. The
* result count would be then augmented each time the fireQueryEvent is
* called.
* @param resultCount the initial result count to set
*/
public void setInitialResultCount(int resultCount)
{
this.resultCount = resultCount;
}
/**
* Adds the given <tt>MetaContactQueryListener</tt> to the list of
* registered listeners. The <tt>MetaContactQueryListener</tt> would be
* notified each time a new <tt>MetaContactQuery</tt> result has been
* received or if the query has been completed or has been canceled by user
* or for any other reason.
* @param l the <tt>MetaContactQueryListener</tt> to add
*/
public void addContactQueryListener(MetaContactQueryListener l)
{
synchronized (queryListeners)
{
queryListeners.add(l);
}
}
/**
* Removes the given <tt>MetaContactQueryListener</tt> to the list of
* registered listeners. The <tt>MetaContactQueryListener</tt> would be
* notified each time a new <tt>MetaContactQuery</tt> result has been
* received or if the query has been completed or has been canceled by user
* or for any other reason.
* @param l the <tt>MetaContactQueryListener</tt> to remove
*/
public void removeContactQueryListener(MetaContactQueryListener l)
{
synchronized (queryListeners)
{
queryListeners.remove(l);
}
}
/**
* Notifies the <tt>MetaContactQueryListener</tt> that a new
* <tt>MetaContact</tt> has been received as a result of a search.
* @param metaContact the received <tt>MetaContact</tt>
*/
public void fireQueryEvent(MetaContact metaContact)
{
resultCount++;
MetaContactQueryEvent event
= new MetaContactQueryEvent(this, metaContact);
List<MetaContactQueryListener> listeners;
synchronized (queryListeners)
{
listeners = new LinkedList<MetaContactQueryListener>(queryListeners);
}
Iterator<MetaContactQueryListener> listenersIter = listeners.iterator();
while (listenersIter.hasNext())
{
MetaContactQueryListener listener = listenersIter.next();
listener.metaContactReceived(event);
}
}
/**
* Notifies the <tt>MetaContactQueryListener</tt> that a new
* <tt>MetaGroup</tt> has been received as a result of a search.
* @param metaGroup the received <tt>MetaGroup</tt>
*/
public void fireQueryEvent(MetaContactGroup metaGroup)
{
MetaGroupQueryEvent event
= new MetaGroupQueryEvent(this, metaGroup);
List<MetaContactQueryListener> listeners;
synchronized (queryListeners)
{
listeners = new LinkedList<MetaContactQueryListener>(queryListeners);
}
Iterator<MetaContactQueryListener> listenersIter = listeners.iterator();
while (listenersIter.hasNext())
{
listenersIter.next().metaGroupReceived(event);
}
}
/**
* Notifies the <tt>MetaContactQueryListener</tt> that this query has
* changed its status.
* @param queryStatus the new query status
*/
public void fireQueryEvent(int queryStatus)
{
MetaContactQueryStatusEvent event
= new MetaContactQueryStatusEvent(this, queryStatus);
List<MetaContactQueryListener> listeners;
synchronized (queryListeners)
{
listeners = new LinkedList<MetaContactQueryListener>(queryListeners);
}
Iterator<MetaContactQueryListener> listenersIter = listeners.iterator();
while (listenersIter.hasNext())
{
listenersIter.next().metaContactQueryStatusChanged(event);
}
}
}
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