Smack/source/org/jivesoftware/smack/packet/PacketExtension.java

/**
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 *
 * Copyright (C) 2002-2003 Jive Software. All rights reserved.
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 * The Jive Software License (based on Apache Software License, Version 1.1)
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 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "Smack" and "Jive Software" must not be used to
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package org.jivesoftware.smack.packet;

/**
 * Interface to represent packet extensions. A packet extension is an XML subdocument
 * with a root element name and namespace. Packet extensions are used to provide
 * extended functionality beyond what is in the base XMPP specification. Examples of
 * packet extensions include message events, message properties, and extra presence data.
 * IQ packets cannot contain packet extensions.
 *
 * @see DefaultPacketExtension
 * @see org.jivesoftware.smack.provider.PacketExtensionProvider
 * @author Matt Tucker
 */
public interface PacketExtension {

    /**
     * Returns the root element name.
     *
     * @return the element name.
     */
    public String getElementName();

    /**
     * Returns the root element XML namespace.
     *
     * @return the namespace.
     */
    public String getNamespace();

    /**
     * Returns the XML reppresentation of the PacketExtension.
     *
     * @return the packet extension as XML.
     */
    public String toXML();
}