001/**
002 *
003 * Copyright © 2014 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.json.packet;
018
019import org.jivesoftware.smack.packet.Stanza;
020
021/**
022 * XMPP JSON Containers as defined in XEP-0335.
023 *
024 * @see <a href="http://xmpp.org/extensions/xep-0335.html">XEP-0335: JSON Containers</a>
025 */
026public class JsonPacketExtension extends AbstractJsonPacketExtension {
027
028    public static final String ELEMENT = "json";
029    public static final String NAMESPACE = "urn:xmpp:json:0";
030
031    public JsonPacketExtension(String json) {
032        super(json);
033    }
034
035    @Override
036    public String getNamespace() {
037        return NAMESPACE;
038    }
039
040    @Override
041    public String getElementName() {
042        return ELEMENT;
043    }
044
045    /**
046     * Retrieve the JSON stanza extension from the packet.
047     *
048     * @param packet
049     * @return the JSON stanza extension or null.
050     */
051    public static JsonPacketExtension from(Stanza packet) {
052        return packet.getExtension(ELEMENT, NAMESPACE);
053    }
054}