/**
 * 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.bytestreams.ibb.packet;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smackx.bytestreams.ibb.InBandBytestreamManager;

/**
 * Represents a request to close an In-Band Bytestream.
 * 
 * @author Henning Staib
 */
public class Close extends IQ {

	/* unique session ID identifying this In-Band Bytestream */
	private final String sessionID;

	/**
	 * Creates a new In-Band Bytestream close request packet.
	 * 
	 * @param sessionID
	 *            unique session ID identifying this In-Band Bytestream
	 */
	public Close(String sessionID) {
		if (sessionID == null || "".equals(sessionID)) {
			throw new IllegalArgumentException(
					"Session ID must not be null or empty");
		}
		this.sessionID = sessionID;
		setType(Type.SET);
	}

	/**
	 * Returns the unique session ID identifying this In-Band Bytestream.
	 * 
	 * @return the unique session ID identifying this In-Band Bytestream
	 */
	public String getSessionID() {
		return sessionID;
	}

	@Override
	public String getChildElementXML() {
		StringBuilder buf = new StringBuilder();
		buf.append("<close ");
		buf.append("xmlns=\"");
		buf.append(InBandBytestreamManager.NAMESPACE);
		buf.append("\" ");
		buf.append("sid=\"");
		buf.append(sessionID);
		buf.append("\"");
		buf.append("/>");
		return buf.toString();
	}

}
