/** | |
* 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.pubsub.provider; | |
import org.jivesoftware.smack.packet.PacketExtension; | |
import org.jivesoftware.smack.provider.PacketExtensionProvider; | |
import org.jivesoftware.smack.provider.ProviderManager; | |
import org.jivesoftware.smack.util.PacketParserUtils; | |
import org.jivesoftware.smackx.pubsub.Item; | |
import org.jivesoftware.smackx.pubsub.PayloadItem; | |
import org.jivesoftware.smackx.pubsub.SimplePayload; | |
import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace; | |
import org.xmlpull.v1.XmlPullParser; | |
/** | |
* Parses an <b>item</b> element as is defined in both the {@link PubSubNamespace#BASIC} and | |
* {@link PubSubNamespace#EVENT} namespaces. To parse the item contents, it will use whatever | |
* {@link PacketExtensionProvider} is registered in <b>smack.providers</b> for its element name and namespace. If no | |
* provider is registered, it will return a {@link SimplePayload}. | |
* | |
* @author Robin Collier | |
*/ | |
public class ItemProvider implements PacketExtensionProvider | |
{ | |
public PacketExtension parseExtension(XmlPullParser parser) throws Exception | |
{ | |
String id = parser.getAttributeValue(null, "id"); | |
String node = parser.getAttributeValue(null, "node"); | |
String elem = parser.getName(); | |
int tag = parser.next(); | |
if (tag == XmlPullParser.END_TAG) | |
{ | |
return new Item(id, node); | |
} | |
else | |
{ | |
String payloadElemName = parser.getName(); | |
String payloadNS = parser.getNamespace(); | |
if (ProviderManager.getInstance().getExtensionProvider(payloadElemName, payloadNS) == null) | |
{ | |
boolean done = false; | |
boolean isEmptyElement = false; | |
StringBuilder payloadText = new StringBuilder(); | |
while (!done) | |
{ | |
if (tag == XmlPullParser.END_TAG && parser.getName().equals(elem)) | |
{ | |
done = true; | |
} | |
else if (parser.getEventType() == XmlPullParser.START_TAG) | |
{ | |
payloadText.append("<").append(parser.getName()); | |
if (parser.getName().equals(payloadElemName) && (payloadNS.length() > 0)) | |
payloadText.append(" xmlns=\"").append(payloadNS).append("\""); | |
int n = parser.getAttributeCount(); | |
for (int i = 0; i < n; i++) | |
payloadText.append(" ").append(parser.getAttributeName(i)).append("=\"") | |
.append(parser.getAttributeValue(i)).append("\""); | |
if (parser.isEmptyElementTag()) | |
{ | |
payloadText.append("/>"); | |
isEmptyElement = true; | |
} | |
else | |
{ | |
payloadText.append(">"); | |
} | |
} | |
else if (parser.getEventType() == XmlPullParser.END_TAG) | |
{ | |
if (isEmptyElement) | |
isEmptyElement = false; | |
else | |
payloadText.append("</").append(parser.getName()).append(">"); | |
} | |
else if (parser.getEventType() == XmlPullParser.TEXT) | |
{ | |
payloadText.append(parser.getText()); | |
} | |
tag = parser.next(); | |
} | |
return new PayloadItem<SimplePayload>(id, node, new SimplePayload(payloadElemName, payloadNS, payloadText.toString())); | |
} | |
else { | |
return new PayloadItem<PacketExtension>(id, node, PacketParserUtils.parsePacketExtension( | |
payloadElemName, payloadNS, parser)); | |
} | |
} | |
} | |
} |