Hacking Smack PacketExtension in Groovy

import groovy.xml.MarkupBuilder

import org.jivesoftware.smack.packet.PacketExtension
import org.jivesoftware.smack.Chat
import org.jivesoftware.smack.ConnectionConfiguration
import org.jivesoftware.smack.PacketListener
import org.jivesoftware.smack.XMPPConnection
import org.jivesoftware.smack.XMPPException
import org.jivesoftware.smack.filter.PacketFilter
import org.jivesoftware.smack.filter.PacketTypeFilter
import org.jivesoftware.smack.packet.Message
import org.jivesoftware.smackx.muc.MultiUserChat

println "PacketExtension Example Test in Groovy!"

ConnectionConfiguration cc = new ConnectionConfiguration("latitude",
    5222, "latitude")

connection = new XMPPConnection(cc)

println "Connecting to Jabber server and room"
connection.connect()
connection.login("test", "test", "test" + Long.toHexString(System.currentTimeMillis()))


MultiUserChat muc = new MultiUserChat(connection, "xmppcollab@conference.latitude" )
muc.join("test")

println "Connected to Jabber server: ${connection.isConnected()}"

// closure-based implementation of the Java Interface.

def pe = [ getElementName:{return "CollaborationWrapper"},
           getNamespace:{return "http://generated.data.collaboration.xmpp.absd"},
           toXML:{
               def writer = new StringWriter()
               def xml = new MarkupBuilder(writer)
               xml.CollaborationWrapper() {
                   MapGraphic {
                       Identifier('ID_09c3d0c0-331b-4c73-ac2b-fb097d652f29')
                   }
               }
               return writer.toString()
           }        
] as PacketExtension

println "Element Name: " + pe.getElementName()
println "Namespace: " + pe.getNamespace()
println "XML: " + pe.toXML()

def msgObj = muc.createMessage()
msgObj.setBody("testing 1,2,3")
msgObj.addExtension(pe)

muc.sendMessage(msgObj)

println "Sending message: " + msgObj.toXML()