org.jivesoftware.smackx.packet.ChatStateExtension Maven / Gradle / Ivy

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Smack is an Open Source XMPP (Jabber) client library for instant messaging and presence. This library provides the client side functionality as specified in the core XMPP specifications as related to the client side of said specifications.

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/**
 * $RCSfile$
 * $Revision: 2407 $
 * $Date: 2004-11-02 15:37:00 -0800 (Tue, 02 Nov 2004) $
 *
 * Copyright 2003-2007 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.jivesoftware.smackx.packet;

import org.jivesoftware.smackx.ChatState;
import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smack.provider.PacketExtensionProvider;
import org.xmlpull.v1.XmlPullParser;

/**
 * Represents a chat state which is an extension to message packets which is used to indicate
 * the current status of a chat participant.
 *
 * @author Alexander Wenckus
 * @see org.jivesoftware.smackx.ChatState
 */
public class ChatStateExtension implements PacketExtension {

    private ChatState state;

    /**
     * Default constructor. The argument provided is the state that the extension will represent.
     *
     * @param state the state that the extension represents.
     */
    public ChatStateExtension(ChatState state) {
        this.state = state;
    }

    public String getElementName() {
        return state.name();
    }

    public String getNamespace() {
        return "http://jabber.org/protocol/chatstates";
    }

    public String toXML() {
        return "<" + getElementName() + " xmlns=\"" + getNamespace() + "\" />";
    }

    public static class Provider implements PacketExtensionProvider {

        public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
            ChatState state;
            try {
                state = ChatState.valueOf(parser.getName());
            }
            catch (Exception ex) {
                state = ChatState.active;
            }
            return new ChatStateExtension(state);
        }
    }
}