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Tinder is a Java based XMPP library, providing an implementation for XMPP stanzas and components. Tinders origins lie in code that's shared between Jive Software's Openfire and Whack implementations. The implementation that's provided in Tinder hasn't been written again from scratch. Instead, code has been moved from the original projects into Tinder, preserving al of the existing features and functionality. Most of the code that's now in Tinder is based on the org.xmpp package implementation that previously existed in Openfire and Whack. This is the code that defines classes such as Packet, JID, IQ, Component and their extensions. Additionally, some multi-purpose code (such as the DataForm and Result Set Management implementations have been moved to Tinder as well.

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/**
 * Copyright (C) 2004-2009 Jive Software. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.xmpp.muc;

import net.jcip.annotations.NotThreadSafe;

import org.dom4j.Element;
import org.xmpp.packet.Message;

/**
 * Represents an invitation to a Multi-User Chat room from a room occupant to a user that is not
 * an occupant of the room. The invitation must be sent to the room and it's the room
 * responsibility to forward the invitation to the invitee. The sender of the invitation must be
 * the real full JID of the inviter.
 *
 * Code example:
 * 
 * // Invite the someone to the room.
 * Invitation invitation = new Invitation("[email protected]", "Join this excellent room");
 * invitation.setTo("[email protected]");
 * invitation.setFrom("[email protected]/notebook");
 *
 * component.sendPacket(invitation);
 * 
 *
 * @author Gaston Dombiak
 */
@NotThreadSafe
public class Invitation extends Message {

    /**
     * Creates a new invitation.
     *
     * @param invitee the XMPP address of the invitee. The room will forward the invitation to this
     *        address.
     * @param reason the reason why the invitation is being sent.
     */
    public Invitation(String invitee, String reason) {
        super();
        Element element = addChildElement("x", "http://jabber.org/protocol/muc#user");
        Element invite = element.addElement("invite");
        invite.addAttribute("to", invitee);
        if (reason != null && reason.length() > 0) {
            invite.addElement("reason").setText(reason);
        }
    }
}