| /** |
| * $RCSfile: PEPProvider.java,v $ |
| * $Revision: 1.2 $ |
| * $Date: 2007/11/06 02:05:09 $ |
| * |
| * Copyright 2003-2007 Jive Software. |
| * |
| * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.jivesoftware.smackx.provider; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.jivesoftware.smack.packet.PacketExtension; |
| import org.jivesoftware.smack.provider.PacketExtensionProvider; |
| import org.xmlpull.v1.XmlPullParser; |
| |
| /** |
| * |
| * The PEPProvider parses incoming PEPEvent packets. |
| * (XEP-163 has a weird asymmetric deal: outbound PEP are <iq> + <pubsub> and inbound are <message> + <event>. |
| * The provider only deals with inbound, and so it only deals with <message>. |
| * |
| * Anyhoo... |
| * |
| * The way this works is that PEPxxx classes are generic <pubsub> and <message> providers, and anyone who |
| * wants to publish/receive PEPs, such as <tune>, <geoloc>, etc., simply need to extend PEPItem and register (here) |
| * a PacketExtensionProvider that knows how to parse that PEPItem extension. |
| * |
| * @author Jeff Williams |
| */ |
| public class PEPProvider implements PacketExtensionProvider { |
| |
| Map<String, PacketExtensionProvider> nodeParsers = new HashMap<String, PacketExtensionProvider>(); |
| PacketExtension pepItem; |
| |
| /** |
| * Creates a new PEPProvider. |
| * ProviderManager requires that every PacketExtensionProvider has a public, no-argument constructor |
| */ |
| public PEPProvider() { |
| } |
| |
| public void registerPEPParserExtension(String node, PacketExtensionProvider pepItemParser) { |
| nodeParsers.put(node, pepItemParser); |
| } |
| |
| /** |
| * Parses a PEPEvent packet and extracts a PEPItem from it. |
| * (There is only one per <event>.) |
| * |
| * @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 { |
| |
| boolean done = false; |
| while (!done) { |
| int eventType = parser.next(); |
| if (eventType == XmlPullParser.START_TAG) { |
| if (parser.getName().equals("event")) { |
| } else if (parser.getName().equals("items")) { |
| // Figure out the node for this event. |
| String node = parser.getAttributeValue("", "node"); |
| // Get the parser for this kind of node, and if found then parse the node. |
| PacketExtensionProvider nodeParser = nodeParsers.get(node); |
| if (nodeParser != null) { |
| pepItem = nodeParser.parseExtension(parser); |
| } |
| } |
| } else if (eventType == XmlPullParser.END_TAG) { |
| if (parser.getName().equals("event")) { |
| done = true; |
| } |
| } |
| } |
| |
| return pepItem; |
| } |
| } |