Group.java

/* Copyright (c) 2008 Bluendo S.r.L.
 * See about.html for details about license.
 *
 * $Id: Group.java 1323 2009-03-27 17:40:10Z luca $
*/

package it.yup.xmpp;


import it.yup.xml.Element;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

/**
 * A group of contatcs
 */
public class Group {
	
    /** the group name */
    public String name;
    /** the contacts of this group */
    private Vector contacts;
    
	/*
	 * This is a Hashtable contaning groupName <---> group associations 
	 */
    private static Hashtable groups = new Hashtable();
    
    public static Hashtable getGroups() {
    	return groups;
    }
    
    private Group(String name) {
        this.name = name;
        contacts = new Vector();
    }
    
    public static Group getGroup(String name) {
    	if (groups.containsKey(name)==false)
    		groups.put(name, new Group(name));
    	return (Group) groups.get(name);
    }
    
	public Element store() {
		Element groupEl = new Element(Roster.NS_IQ_ROSTER,"group");
		Enumeration en = this.contacts.elements();
		Roster roster = XMPPClient.getInstance().getRoster();
		while (en.hasMoreElements()) {
			Contact c = roster.getContactByJid((String) en.nextElement());
			if (c!= null)
				groupEl.addElement(c.store());
		}
		return groupEl;
	}

	public void removeElement(String jid) {
		this.contacts.removeElement(jid);
	}

	public void addElement(String jid) {
		if (! this.contacts.contains(jid))
			this.contacts.addElement(jid);
	}
}