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/**
* 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) {
StringBuilder payloadText = new StringBuilder();
boolean done = false;
boolean isEmptyElement = false;
// Parse custom payload
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) && (!"".equals(payloadNS))) {
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));
}
}
}
}
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