/**
 * 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 java.util.Date;

import org.jivesoftware.smack.util.StringUtils;

/**
 * A decorator for the {@link DelayInformation} class to transparently support
 * both the new <b>Delay Delivery</b> specification <a
 * href="http://xmpp.org/extensions/xep-0203.html">XEP-0203</a> and the old one
 * <a href="http://xmpp.org/extensions/xep-0091.html">XEP-0091</a>.
 * 
 * Existing code can be backward compatible.
 * 
 * @author Robin Collier
 */
public class DelayInfo extends DelayInformation {

	DelayInformation wrappedInfo;

	/**
	 * Creates a new instance with given delay information.
	 * 
	 * @param delay
	 *            the delay information
	 */
	public DelayInfo(DelayInformation delay) {
		super(delay.getStamp());
		wrappedInfo = delay;
	}

	@Override
	public String getElementName() {
		return "delay";
	}

	@Override
	public String getFrom() {
		return wrappedInfo.getFrom();
	}

	@Override
	public String getNamespace() {
		return "urn:xmpp:delay";
	}

	@Override
	public String getReason() {
		return wrappedInfo.getReason();
	}

	@Override
	public Date getStamp() {
		return wrappedInfo.getStamp();
	}

	@Override
	public void setFrom(String from) {
		wrappedInfo.setFrom(from);
	}

	@Override
	public void setReason(String reason) {
		wrappedInfo.setReason(reason);
	}

	@Override
	public String toXML() {
		final StringBuilder buf = new StringBuilder();
		buf.append("<").append(getElementName()).append(" xmlns=\"")
				.append(getNamespace()).append("\"");
		buf.append(" stamp=\"");
		buf.append(StringUtils.formatXEP0082Date(getStamp()));
		buf.append("\"");
		if (getFrom() != null && getFrom().length() > 0) {
			buf.append(" from=\"").append(getFrom()).append("\"");
		}
		buf.append(">");
		if (getReason() != null && getReason().length() > 0) {
			buf.append(getReason());
		}
		buf.append("</").append(getElementName()).append(">");
		return buf.toString();
	}

}