Convert String to XMPP Stanza using Smack Android
Question
or
Q) Generate XMPP Stanza From String.
Q) Cast String into XMPP Stanza.
By using Smack library in Android,
Message message = new Message();
message.setStanzaId("123");
message.setFrom("923442621149");
message.setType(Message.Type.chat);
message.setBody("shanraisshan");
final String msgString = message.toXML().toString();
Log.e("message --->", msgString);
the above code generated following stanza
msgString:
<message from='923442621149' id='123' type='chat'><body>shanraisshan</body></message>
I have save this msgString into my database.
Now, What I wanted to do is, on retrieving this string back from database
- Cast this msgString back into Java Message Class
- so that I can use attributes ( From, Body, Id )
- using message.getFrom()
Since Message is a child class of Stanza , I tried the below code:
Stanza stanza = new Stanza() {
@Override
public CharSequence toXML() {
return msgString;
}
};
Log.e("stanza XML --->", stanza.toXML().toString());
Log.e("stanza getFrom() ->", stanza.getFrom() + ":");
Log.e("stanza getStanzaId() ->", stanza.getStanzaId() + ":");
The Console Log prints follows
stanza XML --->: <message from='923442621149' id='123' type='chat'><body>shanraisshan</body></message>
stanza getFrom() ->: null:
stanza getStanzaId() ->: OtU0i-29:
I am unable to understand, why
stanza.toXML().toString() prints the right stanza while
stanza.getFrom() is null instead of 923442621149
stanza.getStanzaId() is OtU0i-29 instead of 123
Plus, on casting Stanza to Message , produces ClassCastException
Message castedMsg = (Message)stanza;
produces
java.lang.ClassCastException:
SIMPLIFYING THINGS
How can I convert msgString
msgString = "<message from='923442621149' id='123' type='chat'><body>shanraisshan</body></message>";
into org.jivesoftware.smack.packet. Message class?
1 answers
solution1
7 ACCPTED 2016-09-09 10:47:04
After going through Smack Library source code on Github , I found out that the library is using PacketParserUtils.java method's parseStanza() for casting String to Stanza.
String msgString = "<message from='923442621149' id='123' type='chat'><body>shanraisshan</body></message>";
Message message = (Message)PacketParserUtils.parseStanza(msgString);
Log.e("message XML->", message.toXML().toString());
Log.e("message getFrom()->", message.getFrom() + ":"); //923442621149:
Log.e("message getStanzaId()->", message.getStanzaId() + ":"); //123:
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