mirror of
https://codeberg.org/Mercury-IM/Smack
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94 lines
3.4 KiB
Java
94 lines
3.4 KiB
Java
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/**
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* $RCSfile: PEPProvider.java,v $
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* $Revision: 1.2 $
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* $Date: 2007/11/06 02:05:09 $
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*
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* Copyright 2003-2007 Jive Software.
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*
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* All rights reserved. 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.smackx.provider;
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import java.util.HashMap;
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import java.util.Map;
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import org.jivesoftware.smack.packet.PacketExtension;
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import org.jivesoftware.smack.provider.PacketExtensionProvider;
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import org.xmlpull.v1.XmlPullParser;
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/**
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*
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* The PEPProvider parses incoming PEPEvent packets.
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* (XEP-163 has a weird asymmetric deal: outbound PEP are <iq> + <pubsub> and inbound are <message> + <event>.
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* The provider only deals with inbound, and so it only deals with <message>.
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*
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* Anyhoo...
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*
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* The way this works is that PEPxxx classes are generic <pubsub> and <message> providers, and anyone who
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* wants to publish/receive PEPs, such as <tune>, <geoloc>, etc., simply need to extend PEPItem and register (here)
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* a PacketExtensionProvider that knows how to parse that PEPItem extension.
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*
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* @author Jeff Williams
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*/
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public class PEPProvider implements PacketExtensionProvider {
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Map<String, PacketExtensionProvider> nodeParsers = new HashMap<String, PacketExtensionProvider>();
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PacketExtension pepItem;
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/**
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* Creates a new PEPProvider.
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* ProviderManager requires that every PacketExtensionProvider has a public, no-argument constructor
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*/
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public PEPProvider() {
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}
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public void registerPEPParserExtension(String node, PacketExtensionProvider pepItemParser) {
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nodeParsers.put(node, pepItemParser);
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}
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/**
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* Parses a PEPEvent packet and extracts a PEPItem from it.
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* (There is only one per <event>.)
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*
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* @param parser the XML parser, positioned at the starting element of the extension.
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* @return a PacketExtension.
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* @throws Exception if a parsing error occurs.
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*/
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public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
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boolean done = false;
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while (!done) {
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int eventType = parser.next();
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if (eventType == XmlPullParser.START_TAG) {
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if (parser.getName().equals("event")) {
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} else if (parser.getName().equals("items")) {
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// Figure out the node for this event.
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String node = parser.getAttributeValue("", "node");
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// Get the parser for this kind of node, and if found then parse the node.
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PacketExtensionProvider nodeParser = nodeParsers.get(node);
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if (nodeParser != null) {
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pepItem = nodeParser.parseExtension(parser);
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}
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}
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} else if (eventType == XmlPullParser.END_TAG) {
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if (parser.getName().equals("event")) {
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done = true;
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}
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}
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}
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return pepItem;
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}
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}
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