private synchronized void disconnectResources(AbstractResourceAttribute attrib) {
Set<AbstractResource> resources = attrib.getResources();
// get ids to avoid ConcurrentModificationException
List<String> ids = new ArrayList<String>();
for (AbstractResource resource : resources) ids.add(resource.getID());
for (String id : ids) {
Participant p = getParticipant(id);
if (attrib instanceof Role) p.removeRole((Role) attrib);
else if (attrib instanceof Capability) p.removeCapability((Capability) attrib);
else if (attrib instanceof Position) p.removePosition((Position) attrib);
updateParticipant(p);
}
}
