org.jivesoftware.smackx.pubsub.packet.PubSub 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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/**
 * 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.pubsub.packet;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smackx.pubsub.PubSubElementType;

/**
 * The standard PubSub extension of an {@link IQ} packet.  This is the topmost
 * element of all pubsub requests and replies as defined in the Publish-Subscribe 
 * specification.
 * 
 * @author Robin Collier
 */
public class PubSub extends IQ
{
	private PubSubNamespace ns = PubSubNamespace.BASIC;
	
	/**
    * Returns the XML element name of the extension sub-packet root element.
    *
    * @return the XML element name of the packet extension.
    */
    public String getElementName() {
        return "pubsub";
    }

    /** 
     * Returns the XML namespace of the extension sub-packet root element.
     * According the specification the namespace is 
     * http://jabber.org/protocol/pubsub with a specific fragment depending
     * on the request.  The namespace is defined at XMPP Registrar at
     * 
     * The default value has no fragment.
     * 
     * @return the XML namespace of the packet extension.
     */
    public String getNamespace() 
    {
        return ns.getXmlns();
    }

    /**
     * Set the namespace for the packet if it something other than the default
     * case of {@link PubSubNamespace#BASIC}.  The {@link #getNamespace()} method will return 
     * the result of calling {@link PubSubNamespace#getXmlns()} on the specified enum.
     * 
     * @param ns - The new value for the namespace.
     */
	public void setPubSubNamespace(PubSubNamespace ns)
	{
		this.ns = ns;
	}

	public PacketExtension getExtension(PubSubElementType elem)
	{
		return getExtension(elem.getElementName(), elem.getNamespace().getXmlns());
	}

	/**
	 * Returns the current value of the namespace.  The {@link #getNamespace()} method will return 
     * the result of calling {@link PubSubNamespace#getXmlns()} this value.
	 * 
	 * @return The current value of the namespace.
	 */
	public PubSubNamespace getPubSubNamespace()
	{
		return ns;
	}
    /**
     * Returns the XML representation of a pubsub element according the specification.
     * 
     * The XML representation will be inside of an iq packet like
     * in the following example:
     *      * <iq type='set' id="MlIpV-4" to="pubsub.gato.home" from="[email protected]/Smack">
     *     <pubsub xmlns="http://jabber.org/protocol/pubsub">
     *                      :
     *         Specific request extension
     *                      :
     *     </pubsub>
     * </iq>
     * 
     * 
     */
    public String getChildElementXML() {
        StringBuilder buf = new StringBuilder();
        buf.append("<").append(getElementName()).append(" xmlns=\"").append(getNamespace()).append("\">");
        buf.append(getExtensionsXML());
        buf.append("");
        return buf.toString();
    }

}