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/*
* SIP Communicator, 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.protocol;
import java.util.*;
import java.net.*;
import net.java.sip.communicator.service.protocol.event.*;
import net.java.sip.communicator.util.*;
/**
* The DefaultCallParticipant provides a default implementation for most of the
* CallParticpant methods with the purpose of only leaving custom protocol
* development to clients using the PhoneUI service.
* <p> </p>
*
* @author Emil Ivov
*/
public abstract class AbstractCallParticipant
implements CallParticipant
{
private static final Logger logger
= Logger.getLogger(AbstractCallParticipant.class);
/**
* All the CallParticipant listeners registered with this CallParticipant.
*/
protected ArrayList callParticipantListeners = new ArrayList();
/**
* Registers the <tt>listener</tt> to the list of listeners that would be
* receiving CallParticipantEvents
* @param listener a listener instance to register with this participant.
*/
public void addCallParticipantListener(CallParticipantListener listener)
{
synchronized(callParticipantListeners)
{
if (!callParticipantListeners.contains(listener))
this.callParticipantListeners.add(listener);
}
}
/**
* Unregisters the specified listener.
* @param listener the listener to unregister.
*/
public void removeCallParticipantListener(CallParticipantListener listener)
{
synchronized(callParticipantListeners)
{
if (listener == null)
return;
callParticipantListeners.remove(listener);
}
}
/**
* Constructs a <tt>CallParticipantChangeEvent</tt> using this call
* participant as source, setting it to be of type <tt>eventType</tt> and
* the corresponding <tt>oldValue</tt> and <tt>newValue</tt>,
*
* @param eventType the type of the event to create and dispatch.
* @param oldValue the value of the source property before it changed.
* @param newValue the current value of the source property.
*/
protected void fireCallParticipantChangeEvent(String eventType,
Object oldValue,
Object newValue)
{
this.fireCallParticipantChangeEvent(
eventType, oldValue, newValue, null);
}
/**
* Constructs a <tt>CallParticipantChangeEvent</tt> using this call
* participant as source, setting it to be of type <tt>eventType</tt> and
* the corresponding <tt>oldValue</tt> and <tt>newValue</tt>,
*
* @param eventType the type of the event to create and dispatch.
* @param oldValue the value of the source property before it changed.
* @param newValue the current value of the source property.
* @param reason a string that could be set to contain a human readable
* explanation for the transition (particularly handy when moving into a
* FAILED state).
*/
protected void fireCallParticipantChangeEvent(String eventType,
Object oldValue,
Object newValue,
String reason)
{
CallParticipantChangeEvent evt = new CallParticipantChangeEvent(
this, eventType, oldValue, newValue, reason);
logger.debug("Dispatching a CallParticipantChangeEvent event to "
+ callParticipantListeners.size()
+" listeners. event is: " + evt.toString());
Iterator listeners = null;
synchronized (callParticipantListeners)
{
listeners = new ArrayList(callParticipantListeners).iterator();
}
while (listeners.hasNext())
{
CallParticipantListener listener
= (CallParticipantListener) listeners.next();
if(eventType.equals(CallParticipantChangeEvent
.CALL_PARTICIPANT_ADDRESS_CHANGE))
{
listener.participantAddressChanged(evt);
} else if(eventType.equals(CallParticipantChangeEvent
.CALL_PARTICIPANT_DISPLAY_NAME_CHANGE))
{
listener.participantDisplayNameChanged(evt);
} else if(eventType.equals(CallParticipantChangeEvent
.CALL_PARTICIPANT_IMAGE_CHANGE))
{
listener.participantImageChanged(evt);
} else if(eventType.equals(CallParticipantChangeEvent
.CALL_PARTICIPANT_STATE_CHANGE))
{
listener.participantStateChanged(evt);
}
}
}
/**
* Returns a string representation of the participant in the form of
* <br>
* Display Name <address>;status=CallParticipantStatus
* @return a string representation of the participant and its state.
*/
public String toString()
{
return getDisplayName() + " <" + getAddress()
+ ">;status=" + getState().getStateString();
}
/**
* Returns a URL pointing ta a location with call control information for
* this participant or <tt>null</tt> if no such URL is available for this
* call participant.
*
* @return a URL link to a location with call information or a call control
* web interface related to this participant or <tt>null</tt> if no such URL
* is available.
*/
public URL getCallInfoURL()
{
//if signaling protocols (such as SIP) know where to get this URL from
//they should override this method
return null;
}
}
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