Smack/source/org/jivesoftware/smackx/provider/RosterExchangeProvider.java

/**
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 *
 * Copyright (C) 2002-2003 Jive Software. All rights reserved.
 * ====================================================================
 * The Jive Software License (based on Apache Software License, Version 1.1)
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by
 *        Jive Software (http://www.jivesoftware.com)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Smack" and "Jive Software" must not be used to
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 *    contact webmaster@jivesoftware.com.
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 * 5. Products derived from this software may not be called "Smack",
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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package org.jivesoftware.smackx.provider;

import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smack.provider.PacketExtensionProvider;
import org.jivesoftware.smackx.packet.*;
import org.xmlpull.v1.XmlPullParser;

/**
 *
 * The RosterExchangeProvider parses RosterExchange packets.
 *
 * @author Gaston Dombiak
 */
public class RosterExchangeProvider implements PacketExtensionProvider {

    /**
     * Creates a new RosterExchangeProvider.
     * ProviderManager requires that every PacketExtensionProvider has a public, no-argument constructor
     */
    public RosterExchangeProvider() {
    }

    /**
     * Parses a RosterExchange packet (extension sub-packet).
     *
     * @param parser the XML parser, positioned at the starting element of the extension.
     * @return a PacketExtension.
     * @throws Exception if a parsing error occurs.
     */
    public PacketExtension parseExtension(XmlPullParser parser) throws Exception {

        RosterExchange rosterExchange = new RosterExchange();
        boolean done = false;
        RosterExchange.Item item = null;
        while (!done) {
            int eventType = parser.next();
            if (eventType == XmlPullParser.START_TAG) {
                if (parser.getName().equals("item")) {
                    String jid = parser.getAttributeValue("", "jid");
                    String name = parser.getAttributeValue("", "name");
                    // Create packet.
                    item = new RosterExchange.Item(jid, name);
                }
                if (parser.getName().equals("group")) {
                    String groupName = parser.nextText();
                    item.addGroupName(groupName);
                }
            } else if (eventType == XmlPullParser.END_TAG) {
                if (parser.getName().equals("item")) {
                    rosterExchange.addRosterItem(item);
                }
                if (parser.getName().equals("x")) {
                    done = true;
                }
            }
        }

        return rosterExchange;

    }

}