001/** 002 * 003 * Copyright the original author or authors 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.pubsub.provider; 018 019import org.jivesoftware.smack.packet.ExtensionElement; 020import org.jivesoftware.smack.provider.ExtensionElementProvider; 021import org.jivesoftware.smack.provider.ProviderManager; 022import org.jivesoftware.smack.util.PacketParserUtils; 023 024import org.jivesoftware.smackx.pubsub.Item; 025import org.jivesoftware.smackx.pubsub.PayloadItem; 026import org.jivesoftware.smackx.pubsub.SimplePayload; 027import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace; 028 029import org.xmlpull.v1.XmlPullParser; 030 031/** 032 * Parses an <b>item</b> element as is defined in both the {@link PubSubNamespace#BASIC} and 033 * {@link PubSubNamespace#EVENT} namespaces. To parse the item contents, it will use whatever 034 * {@link ExtensionElementProvider} is registered in <b>smack.providers</b> for its element name and namespace. If no 035 * provider is registered, it will return a {@link SimplePayload}. 036 * 037 * @author Robin Collier 038 */ 039public class ItemProvider extends ExtensionElementProvider<Item> 040{ 041 @Override 042 public Item parse(XmlPullParser parser, int initialDepth) 043 throws Exception { 044 String id = parser.getAttributeValue(null, "id"); 045 String node = parser.getAttributeValue(null, "node"); 046 047 int tag = parser.next(); 048 049 if (tag == XmlPullParser.END_TAG) 050 { 051 return new Item(id, node); 052 } 053 else 054 { 055 String payloadElemName = parser.getName(); 056 String payloadNS = parser.getNamespace(); 057 058 final ExtensionElementProvider<ExtensionElement> extensionProvider = ProviderManager.getExtensionProvider(payloadElemName, payloadNS); 059 if (extensionProvider == null) 060 { 061 CharSequence payloadText = PacketParserUtils.parseElement(parser, true); 062 return new PayloadItem<>(id, node, new SimplePayload(payloadElemName, payloadNS, payloadText)); 063 } 064 else 065 { 066 return new PayloadItem<>(id, node, extensionProvider.parse(parser)); 067 } 068 } 069 } 070 071}