/**
* Parses a presence packet.
*
* @param parser the XML parser, positioned at the start of a presence packet.
* @return a Presence packet.
* @throws Exception if an exception occurs while parsing the packet.
*/
public static Presence parsePresence(XmlPullParser parser) throws Exception {
Presence.Type type = Presence.Type.available;
String typeString = parser.getAttributeValue("", "type");
if (typeString != null && !typeString.equals("")) {
try {
type = Presence.Type.valueOf(typeString);
} catch (IllegalArgumentException iae) {
System.err.println("Found invalid presence type " + typeString);
}
}
Presence presence = new Presence(type);
presence.setTo(parser.getAttributeValue("", "to"));
presence.setFrom(parser.getAttributeValue("", "from"));
String id = parser.getAttributeValue("", "id");
presence.setPacketID(id == null ? Packet.ID_NOT_AVAILABLE : id);
String language = getLanguageAttribute(parser);
if (language != null && !"".equals(language.trim())) {
presence.setLanguage(language);
}
presence.setPacketID(id == null ? Packet.ID_NOT_AVAILABLE : id);
// Parse sub-elements
boolean done = false;
while (!done) {
int eventType = parser.next();
if (eventType == XmlPullParser.START_TAG) {
String elementName = parser.getName();
String namespace = parser.getNamespace();
if (elementName.equals("status")) {
presence.setStatus(parser.nextText());
} else if (elementName.equals("priority")) {
try {
int priority = Integer.parseInt(parser.nextText());
presence.setPriority(priority);
} catch (NumberFormatException nfe) {
// Ignore.
} catch (IllegalArgumentException iae) {
// Presence priority is out of range so assume priority to be zero
presence.setPriority(0);
}
} else if (elementName.equals("show")) {
String modeText = parser.nextText();
try {
presence.setMode(Presence.Mode.valueOf(modeText));
} catch (IllegalArgumentException iae) {
System.err.println("Found invalid presence mode " + modeText);
}
} else if (elementName.equals("error")) {
presence.setError(parseError(parser));
} else if (elementName.equals("properties") && namespace.equals(PROPERTIES_NAMESPACE)) {
Map<String, Object> properties = parseProperties(parser);
// Set packet properties.
for (String name : properties.keySet()) {
presence.setProperty(name, properties.get(name));
}
}
// Otherwise, it must be a packet extension.
else {
try {
presence.addExtension(
PacketParserUtils.parsePacketExtension(elementName, namespace, parser));
} catch (Exception e) {
System.err.println("Failed to parse extension packet in Presence packet.");
}
}
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals("presence")) {
done = true;
}
}
}
return presence;
}
