Smack: Simple wrapper to obtain XMPPConnection based on JID and password

XMPPService.java

package freely.messaging;

import java.io.IOException;

import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.TCPConnection;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.ConnectionConfiguration.SecurityMode;
import org.jivesoftware.smack.XMPPException;

public class XMPPService {
	private String username;
	private String password;
	private String host;
	private int port;
	
	private XMPPConnection connection;
	
	public XMPPService(String jid, String password) {
		this(jid, password, 5222);
	}
	
	public XMPPService(String jid, String password, int port) {
		this.password = password;
		this.port = port;		
		this.setUsernameAndHostFromJid(jid);
	}
	
	public XMPPConnection connect() throws SmackException, IOException, XMPPException{
		if(this.connection != null && this.connection.isConnected()){		
			if(!this.connection.isAuthenticated()){
				this.connection.login(this.username, this.password);
			}
			return this.connection;
		}
		ConnectionConfiguration config = getConfig();		
		XMPPConnection connection = new TCPConnection(config);
		connection.connect();
		connection.login(this.username, this.password);
		this.connection = connection;
		return this.connection;
	}
	
	public void disconnect(){
		if(this.connection == null || !this.connection.isConnected()){
			return;
		}
		this.connection.disconnect();
	}
	
	private void setUsernameAndHostFromJid(String jid){
		String[] data = jid.split("@");
		assert data.length == 2;
		this.username = data[0];
		this.host = data[1];
	}
	
	private ConnectionConfiguration getConfig(){
		ConnectionConfiguration config = new ConnectionConfiguration(
			this.host, this.port);		
		config.setCompressionEnabled(true);
		config.setReconnectionAllowed(true);
		config.setSecurityMode(SecurityMode.required);	
		
		//Enabled debug
		config.setDebuggerEnabled(true);
		
		return config;
	}
}