map.put("widget", instance.getWidget());//$NON-NLS-1$
map.put("participantId", participantId);//$NON-NLS-1$
if (persistenceManager.findByValues(IParticipant.class, map).length != 0) return false;
// Add participant
IParticipant participant = persistenceManager.newInstance(IParticipant.class);
participant.setParticipantId(participantId);
participant.setParticipantDisplayName(participantDisplayName);
participant.setParticipantThumbnailUrl(participantThumbnailUrl);
participant.setSharedDataKey(instance.getSharedDataKey());
participant.setWidget(instance.getWidget());