/**
* Parses a message packet.
*
* @param parser the XML parser, positioned at the start of a message packet.
* @return a Message packet.
* @throws Exception if an exception occurs while parsing the packet.
*/
public static Packet parseMessage(XmlPullParser parser) throws Exception {
Message message = new Message();
String id = parser.getAttributeValue("", "id");
message.setPacketID(id == null ? Packet.ID_NOT_AVAILABLE : id);
message.setTo(parser.getAttributeValue("", "to"));
message.setFrom(parser.getAttributeValue("", "from"));
message.setType(Message.Type.fromString(parser.getAttributeValue("", "type")));
String language = getLanguageAttribute(parser);
// determine message's default language
String defaultLanguage = null;
if (language != null && !"".equals(language.trim())) {
message.setLanguage(language);
defaultLanguage = language;
} else {
defaultLanguage = Packet.getDefaultLanguage();
}
// Parse sub-elements. We include extra logic to make sure the values
// are only read once. This is because it's possible for the names to appear
// in arbitrary sub-elements.
boolean done = false;
String thread = null;
Map<String, Object> properties = null;
while (!done) {
int eventType = parser.next();
if (eventType == XmlPullParser.START_TAG) {
String elementName = parser.getName();
String namespace = parser.getNamespace();
if (elementName.equals("subject")) {
String xmlLang = getLanguageAttribute(parser);
if (xmlLang == null) {
xmlLang = defaultLanguage;
}
String subject = parseContent(parser);
if (message.getSubject(xmlLang) == null) {
message.addSubject(xmlLang, subject);
}
} else if (elementName.equals("body")) {
String xmlLang = getLanguageAttribute(parser);
if (xmlLang == null) {
xmlLang = defaultLanguage;
}
String body = parseContent(parser);
if (message.getBody(xmlLang) == null) {
message.addBody(xmlLang, body);
}
} else if (elementName.equals("thread")) {
if (thread == null) {
thread = parser.nextText();
}
} else if (elementName.equals("error")) {
message.setError(parseError(parser));
} else if (elementName.equals("properties") && namespace.equals(PROPERTIES_NAMESPACE)) {
properties = parseProperties(parser);
}
// Otherwise, it must be a packet extension.
else {
message.addExtension(
PacketParserUtils.parsePacketExtension(elementName, namespace, parser));
}
} else if (eventType == XmlPullParser.END_TAG) {
if (parser.getName().equals("message")) {
done = true;
}
}
}
message.setThread(thread);
// Set packet properties.
if (properties != null) {
for (String name : properties.keySet()) {
message.setProperty(name, properties.get(name));
}
}
return message;
}
