StDistance.java

/*
 * Copyright (C) 2011, Emergya (http://www.emergya.es)
 *
 * @author <a href="mailto:marias@emergya.com">María Arias</a>
 *
 * This file is part of GoFleet
 *
 * This software is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This software 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, if you link this library with other files to
 * produce an executable, this library does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * This exception does not however invalidate any other reasons why the
 * executable file might be covered by the GNU General Public License.
 */
package org.gofleet.openLS.ddbb.order;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.criterion.CriteriaQuery;
import org.hibernate.criterion.Order;

import com.vividsolutions.jts.geom.Geometry;

/**
 * @author marias
 * 
 */
public class StDistance extends Order {
	private static final long serialVersionUID = -3189851876865663801L;

	protected String propertyName = "";
	protected Geometry geom = null;
	protected boolean ascending = false;

	protected StDistance(String propertyName, Geometry geom, boolean ascending) {
		super(propertyName, ascending);
		this.propertyName = propertyName;
		this.geom = geom;
		this.ascending = ascending;
	}

	public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
			throws HibernateException {
		return toString() + (ascending ? " asc" : " desc");
	}

	@Override
	public String toString() {
		return "st_distance(" + propertyName + ", st_geomfromtext('"
				+ geom.toText() + "', " + geom.getSRID() + "))";
	}

	public static StDistance asc(String propertyName, Geometry geom) {
		return new StDistance(propertyName, geom, true);
	}

	public static StDistance des(String propertyName, Geometry geom) {
		return new StDistance(propertyName, geom, false);
	}
}