NotificationMessageImpl.java

/**
 * Copyright (C) 2008 - 2014 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * icense version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.ses.wsn;

import java.io.Serializable;
import java.util.Collection;

import org.apache.muse.util.xml.XmlUtils;
import org.apache.muse.ws.addressing.soap.SoapFault;
import org.apache.muse.ws.notification.NotificationMessage;
import org.apache.muse.ws.notification.impl.SimpleNotificationMessage;
import org.n52.ses.api.ws.INotificationMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;


public class NotificationMessageImpl implements INotificationMessage, Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = -7640713398661834738L;
	private static final Logger logger = LoggerFactory.getLogger(NotificationMessageImpl.class);
	
	private transient NotificationMessage message;

	private Element messageXml;

	public NotificationMessageImpl(Object message) {
		if (!(message instanceof NotificationMessage)) {
			throw new IllegalArgumentException("Only NotificationMessage instances allowed.");
		}
		this.message = (NotificationMessage) message;
		this.messageXml = this.message.toXML();
	}
	
	@Override
	public Object getNotificationMessage() {
		synchronized (this) {
			if (this.message == null && this.messageXml != null) {
				try {
					this.message = new SimpleNotificationMessage(this.messageXml);
				} catch (SoapFault e) {
					logger.warn("Could not recreate NotificationMessage", e);
				}
			}
		}
		return this.message;
	}

	@Override
	public String xmlToString() {
		return XmlUtils.toString(((NotificationMessage) getNotificationMessage()).toXML());
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == null || !(obj instanceof NotificationMessageImpl)) {
			return false;
		}
		
		NotificationMessage thisMessage = (NotificationMessage) this.getNotificationMessage();
		NotificationMessage thatMessage = (NotificationMessage) ((NotificationMessageImpl) obj).getNotificationMessage();
		
		if (thisMessage == null || thatMessage == null) {
			return false;
		}
		
		Collection<?> thisNames = thisMessage.getMessageContentNames();
		Collection<?> thatNames = thatMessage.getMessageContentNames();
		
		for (Object object : thatNames) {
			if (!thisNames.contains(object)) {
				return false;
			}
		}
		
		if (thisMessage.getProducerReference() != null && thatMessage.getProducerReference() != null) {
			if (!thisMessage.getProducerReference().equals(thatMessage.getProducerReference())) {
				return false;
			}
		}
		else if (thatMessage.getProducerReference() == null && thisMessage.getProducerReference() != null) {
			return false;
		}
		else if (thatMessage.getProducerReference() != null && thisMessage.getProducerReference() == null) {
			return false;
		}
		
		if (thisMessage.getSubscriptionReference() != null && thatMessage.getSubscriptionReference() != null) {
			if (!thisMessage.getSubscriptionReference().equals(thatMessage.getSubscriptionReference())) {
				return false;
			}
		}
		else if (thatMessage.getSubscriptionReference() == null && thisMessage.getSubscriptionReference() != null) {
			return false;
		}
		else if (thatMessage.getSubscriptionReference() != null && thisMessage.getSubscriptionReference() == null) {
			return false;
		}
		
		return true;
	}
	
	@Override
	public int hashCode() {
		return 1234 + (this.messageXml != null ? this.messageXml.hashCode() : 0);
	}
	
}