33 lines
1.4 KiB
Java
33 lines
1.4 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software, 2018-2021 Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.packet;
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/**
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* Interface to represent XMPP extension elements. Unlike {@link XmlElement}, every non-abstract class that implements
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* {@link ExtensionElement} must have a static final QNAME member of the type {@link javax.xml.namespace.QName}. This
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* allows type-safe functions like {@link StanzaView#getExtension(Class)}. Hence this is a marker interface.
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* <p>
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* Use this class when implementing new extension elements when possible. This means that every instance of your
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* implemented class must represent an XML element of the same qualified name.
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* </p>
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*
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* @see <a href="https://tools.ietf.org/html/rfc6120#section-8.4">RFC 6120 § 8.4 Extended Content</a>
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*/
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public interface ExtensionElement extends XmlElement {
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}
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