/**
* 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));
}
}
}
}