// 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
// and if the request was not send to a node. If Entity Caps are
// enabled the client's identity and features are may also added
// if the right node is chosen
if (discoverInfo.getNode() == null) {
addDiscoverInfoTo(response);
}
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
response.addFeatures(nodeInformationProvider.getNodeFeatures());
// Add node identities
response.addIdentities(nodeInformationProvider.getNodeIdentities());
// Add packet extensions
response.addExtensions(nodeInformationProvider.getNodePacketExtensions());
}
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);
}
}