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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: 7071 $
 * $Date: 2007-02-11 18:59:05 -0600 (Sun, 11 Feb 2007) $
 *
 * 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.smack.packet.IQ;

/**
 * A Version IQ packet, which is used by XMPP clients to discover version information
 * about the software running at another entity's JID.
 *
 * An example to discover the version of the server:
 * 
 * // Request the version from the server.
 * Version versionRequest = new Version();
 * timeRequest.setType(IQ.Type.GET);
 * timeRequest.setTo("example.com");
 *
 * // Create a packet collector to listen for a response.
 * PacketCollector collector = con.createPacketCollector(
 *                new PacketIDFilter(versionRequest.getPacketID()));
 *
 * con.sendPacket(versionRequest);
 *
 * // Wait up to 5 seconds for a result.
 * IQ result = (IQ)collector.nextResult(5000);
 * if (result != null && result.getType() == IQ.Type.RESULT) {
 *     Version versionResult = (Version)result;
 *     // Do something with result...
 * }
 *
 * @author Gaston Dombiak
 */
public class Version extends IQ {

    private String name;
    private String version;
    private String os;

    /**
     * Returns the natural-language name of the software. This property will always be
     * present in a result.
     *
     * @return the natural-language name of the software.
     */
    public String getName() {
        return name;
    }

    /**
     * Sets the natural-language name of the software. This message should only be
     * invoked when parsing the XML and setting the property to a Version instance.
     *
     * @param name the natural-language name of the software.
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * Returns the specific version of the software. This property will always be
     * present in a result.
     *
     * @return the specific version of the software.
     */
    public String getVersion() {
        return version;
    }

    /**
     * Sets the specific version of the software. This message should only be
     * invoked when parsing the XML and setting the property to a Version instance.
     *
     * @param version the specific version of the software.
     */
    public void setVersion(String version) {
        this.version = version;
    }

    /**
     * Returns the operating system of the queried entity. This property will always be
     * present in a result.
     *
     * @return the operating system of the queried entity.
     */
    public String getOs() {
        return os;
    }

    /**
     * Sets the operating system of the queried entity. This message should only be
     * invoked when parsing the XML and setting the property to a Version instance.
     *
     * @param os operating system of the queried entity.
     */
    public void setOs(String os) {
        this.os = os;
    }

    public String getChildElementXML() {
        StringBuilder buf = new StringBuilder();
        buf.append("");
        if (name != null) {
            buf.append("").append(name).append("");
        }
        if (version != null) {
            buf.append("").append(version).append("");
        }
        if (os != null) {
            buf.append("").append(os).append("");
        }
        buf.append("");
        return buf.toString();
    }
}