1 /** 2 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); 3 * you may not use this file except in compliance with the License. 4 * You may obtain a copy of the License at 5 * 6 * http://www.apache.org/licenses/LICENSE-2.0 7 * 8 * Unless required by applicable law or agreed to in writing, software 9 * distributed under the License is distributed on an "AS IS" BASIS, 10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 * See the License for the specific language governing permissions and 12 * limitations under the License. 13 */ 14 package org.jivesoftware.smackx.pubsub.provider; 15 16 import org.jivesoftware.smack.packet.PacketExtension; 17 import org.jivesoftware.smack.provider.PacketExtensionProvider; 18 import org.jivesoftware.smack.provider.ProviderManager; 19 import org.jivesoftware.smack.util.PacketParserUtils; 20 import org.jivesoftware.smackx.pubsub.Item; 21 import org.jivesoftware.smackx.pubsub.PayloadItem; 22 import org.jivesoftware.smackx.pubsub.SimplePayload; 23 import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace; 24 import org.xmlpull.v1.XmlPullParser; 25 26 /** 27 * Parses an <b>item</b> element as is defined in both the {@link PubSubNamespace#BASIC} and {@link PubSubNamespace#EVENT} 28 * namespaces. To parse the item contents, it will use whatever {@link PacketExtensionProvider} is registered in 29 * <b>smack.providers</b> for its element name and namespace. If no provider is registered, it will return a {@link SimplePayload}. 30 * 31 * @author Robin Collier 32 */ 33 public class ItemProvider implements PacketExtensionProvider { parseExtension(XmlPullParser parser)34 public PacketExtension parseExtension(XmlPullParser parser) throws Exception { 35 String id = parser.getAttributeValue(null, "id"); 36 String node = parser.getAttributeValue(null, "node"); 37 String elem = parser.getName(); 38 39 int tag = parser.next(); 40 41 if (tag == XmlPullParser.END_TAG) { 42 return new Item(id, node); 43 } else { 44 String payloadElemName = parser.getName(); 45 String payloadNS = parser.getNamespace(); 46 47 if (ProviderManager.getInstance().getExtensionProvider(payloadElemName, payloadNS) == null) { 48 StringBuilder payloadText = new StringBuilder(); 49 boolean done = false; 50 boolean isEmptyElement = false; 51 52 // Parse custom payload 53 while (!done) { 54 if (tag == XmlPullParser.END_TAG && parser.getName().equals(elem)) { 55 done = true; 56 } else if (parser.getEventType() == XmlPullParser.START_TAG) { 57 payloadText.append("<").append(parser.getName()); 58 if (parser.getName().equals(payloadElemName) && (!"".equals(payloadNS))) { 59 payloadText.append(" xmlns=\"").append(payloadNS).append("\""); 60 } 61 int n = parser.getAttributeCount(); 62 for (int i = 0; i < n; i++) { 63 payloadText.append(" ").append(parser.getAttributeName(i)).append("=\"") 64 .append(parser.getAttributeValue(i)).append("\""); 65 } 66 if (parser.isEmptyElementTag()) { 67 payloadText.append("/>"); 68 isEmptyElement = true; 69 } else { 70 payloadText.append(">"); 71 } 72 } else if (parser.getEventType() == XmlPullParser.END_TAG) { 73 if (isEmptyElement) { 74 isEmptyElement = false; 75 } else { 76 payloadText.append("</").append(parser.getName()).append(">"); 77 } 78 } else if (parser.getEventType() == XmlPullParser.TEXT) { 79 payloadText.append(parser.getText()); 80 } 81 82 tag = parser.next(); 83 } 84 return new PayloadItem<SimplePayload>(id, node, new SimplePayload(payloadElemName, payloadNS, 85 payloadText.toString())); 86 } else { 87 return new PayloadItem<PacketExtension>(id, node, PacketParserUtils.parsePacketExtension( 88 payloadElemName, payloadNS, parser)); 89 } 90 } 91 } 92 } 93