org.jivesoftware.smack.provider.IQProvider Java Examples

/**
 * Parses an IQ packet.
 *
 * @param parser the XML parser, positioned at the start of an IQ packet.
 * @return an IQ object.
 * @throws Exception if an exception occurs while parsing the packet.
 */
public static IQ parseIQ(XmlPullParser parser, Connection connection) throws Exception {
    IQ iqPacket = null;

    String id = parser.getAttributeValue("", "id");
    String to = parser.getAttributeValue("", "to");
    String from = parser.getAttributeValue("", "from");
    IQ.Type type = IQ.Type.fromString(parser.getAttributeValue("", "type"));
    XMPPError error = null;

    boolean done = false;
    while (!done) {
        int eventType = parser.next();

        if (eventType == XmlPullParser.START_TAG) {
            String elementName = parser.getName();
            String namespace = parser.getNamespace();
            if (elementName.equals("error")) {
                error = PacketParserUtils.parseError(parser);
            }
            else if (elementName.equals("query") && namespace.equals("jabber:iq:auth")) {
                iqPacket = parseAuthentication(parser);
            }
            else if (elementName.equals("query") && namespace.equals("jabber:iq:roster")) {
                iqPacket = parseRoster(parser);
            }
            else if (elementName.equals("query") && namespace.equals("jabber:iq:register")) {
                iqPacket = parseRegistration(parser);
            }
            else if (elementName.equals("bind") &&
                    namespace.equals("urn:ietf:params:xml:ns:xmpp-bind")) {
                iqPacket = parseResourceBinding(parser);
            }
            // Otherwise, see if there is a registered provider for
            // this element name and namespace.
            else {
                Object provider = ProviderManager.getInstance().getIQProvider(elementName, namespace);
                if (provider != null) {
                    if (provider instanceof IQProvider) {
                        iqPacket = ((IQProvider)provider).parseIQ(parser);
                    }
                    else if (provider instanceof Class) {
                        iqPacket = (IQ)PacketParserUtils.parseWithIntrospection(elementName,
                                (Class)provider, parser);
                    }
                }
            }
        }
        else if (eventType == XmlPullParser.END_TAG) {
            if (parser.getName().equals("iq")) {
                done = true;
            }
        }
    }
    // Decide what to do when an IQ packet was not understood
    if (iqPacket == null) {
        if (IQ.Type.GET == type || IQ.Type.SET == type ) {
            // If the IQ stanza is of type "get" or "set" containing a child element
            // qualified by a namespace it does not understand, then answer an IQ of
            // type "error" with code 501 ("feature-not-implemented")
            iqPacket = new IQ() {
                public String getChildElementXML() {
                    return null;
                }
            };
            iqPacket.setPacketID(id);
            iqPacket.setTo(from);
            iqPacket.setFrom(to);
            iqPacket.setType(IQ.Type.ERROR);
            iqPacket.setError(new XMPPError(XMPPError.Condition.feature_not_implemented));
            connection.sendPacket(iqPacket);
            return null;
        }
        else {
            // If an IQ packet wasn't created above, create an empty IQ packet.
            iqPacket = new IQ() {
                public String getChildElementXML() {
                    return null;
                }
            };
        }
    }

    // Set basic values on the iq packet.
    iqPacket.setPacketID(id);
    iqPacket.setTo(to);
    iqPacket.setFrom(from);
    iqPacket.setType(type);
    iqPacket.setError(error);

    return iqPacket;
}