// Listen for disco#info requests and answer the client's supported features
// To add a new feature as supported use the #addFeature message
packetFilter = new PacketTypeFilter(DiscoverInfo.class);
packetListener = new PacketListener() {
public void processPacket(Packet packet) {
DiscoverInfo discoverInfo = (DiscoverInfo) packet;
// Answer the client's supported features if the request is of the GET type
if (discoverInfo != null && discoverInfo.getType() == IQ.Type.GET) {
DiscoverInfo response = new DiscoverInfo();
response.setType(IQ.Type.RESULT);
response.setTo(discoverInfo.getFrom());
response.setPacketID(discoverInfo.getPacketID());
response.setNode(discoverInfo.getNode());
// Add the client's identity and features only if "node" is null
if (discoverInfo.getNode() == null) {
// Set this client identity
DiscoverInfo.Identity identity = new DiscoverInfo.Identity("client",
getIdentityName());
identity.setType(getIdentityType());
response.addIdentity(identity);
// Add the registered features to the response
synchronized (features) {
for (Iterator<String> it = getFeatures(); it.hasNext();) {
response.addFeature(it.next());
}
if (extendedInfo != null) {
response.addExtension(extendedInfo);
}
}
}
else {
// Disco#info was sent to a node. Check if we have information of the
// specified node
NodeInformationProvider nodeInformationProvider =
getNodeInformationProvider(discoverInfo.getNode());
if (nodeInformationProvider != null) {
// Node was found. Add node features
List<String> features = nodeInformationProvider.getNodeFeatures();
if (features != null) {
for(String feature : features) {
response.addFeature(feature);
}
}
// Add node identities
List<DiscoverInfo.Identity> identities =
nodeInformationProvider.getNodeIdentities();
if (identities != null) {
for (DiscoverInfo.Identity identity : identities) {
response.addIdentity(identity);
}
}
}
else {
// Return <item-not-found/> error since specified node was not found
response.setType(IQ.Type.ERROR);
response.setError(new XMPPError(XMPPError.Condition.item_not_found));
}
}
connection.sendPacket(response);
}
}