franta-hg@119: package cz.frantovo.nekurak.ext;
franta-hg@100: 
franta-hg@100: import java.io.UnsupportedEncodingException;
franta-hg@100: import java.net.URLEncoder;
franta-hg@100: import java.util.logging.Level;
franta-hg@100: import java.util.logging.Logger;
franta-hg@100: import javax.xml.parsers.DocumentBuilder;
franta-hg@100: import javax.xml.parsers.DocumentBuilderFactory;
franta-hg@100: import org.w3c.dom.Document;
franta-hg@100: import org.w3c.dom.Node;
franta-hg@100: import org.w3c.dom.NodeList;
franta-hg@100: 
franta-hg@100: /**
franta-hg@100:  * TODO: přesunout jinam a převést na EJB.
franta-hg@100:  * @author fiki
franta-hg@100:  */
franta-hg@100: public class Geo {
franta-hg@100: 
franta-hg@145: 	private static final Logger log = Logger.getLogger(Geo.class.getSimpleName());
franta-hg@100: 
franta-hg@145: 	/**
franta-hg@145: 	 * Převede poštovní adresu na zeměpisné souřadnice.
franta-hg@145: 	 * @param adresa
franta-hg@145: 	 * @return souřadnice k dané adrese nebo null, v případě chyby.
franta-hg@145: 	 */
franta-hg@145: 	public Souradnice getSouradnice(String adresa) {
franta-hg@145: 		try {
franta-hg@100: 
franta-hg@145: 			/**
franta-hg@145: 			 * TODO: naprosto zprasené → předělat →
franta-hg@145: 			 * http://code.google.com/intl/cs/apis/maps/documentation/geocoding/#XMLParsing
franta-hg@145: 			 */
franta-hg@145: 			DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
franta-hg@145: 			Document d = db.parse(sestavURL(adresa));
franta-hg@145: 			NodeList mista = d.getElementsByTagName("location");
franta-hg@145: 			Node misto = mista.item(0);
franta-hg@145: 			NodeList potomci = misto.getChildNodes();
franta-hg@145: 			String delka = null;
franta-hg@145: 			String sirka = null;
franta-hg@145: 			for (int i = 0; i < potomci.getLength(); i++) {
franta-hg@145: 				Node p = potomci.item(i);
franta-hg@145: 				if ("lat".equals(p.getNodeName())) {
franta-hg@145: 					sirka = p.getTextContent();
franta-hg@145: 				}
franta-hg@145: 				if ("lng".equals(p.getNodeName())) {
franta-hg@145: 					delka = p.getTextContent();
franta-hg@145: 				}
franta-hg@145: 			}
franta-hg@145: 
franta-hg@145: 			if (sirka == null || delka == null) {
franta-hg@145: 				log.log(Level.WARNING, "Selhalo zjišťování souřadnic – šířka nebo délka jsou null – pro adresu: " + adresa);
franta-hg@145: 				return null;
franta-hg@145: 			} else {
franta-hg@145: 				return new Souradnice(Double.parseDouble(sirka), Double.parseDouble(delka));
franta-hg@145: 			}
franta-hg@145: 		} catch (Exception e) {
franta-hg@145: 			log.log(Level.WARNING, "Selhalo zjišťování souřadnic pro adresu: " + adresa, e);
franta-hg@145: 			return null;
franta-hg@100: 		}
franta-hg@100: 	}
franta-hg@100: 
franta-hg@145: 	private static String sestavURL(String adresa) throws UnsupportedEncodingException {
franta-hg@145: 		return "http://maps.google.com/maps/api/geocode/xml?sensor=false&address=" + URLEncoder.encode(adresa, "UTF-8");
franta-hg@120: 	}
franta-hg@120: 
franta-hg@145: 	public class Souradnice {
franta-hg@145: 
franta-hg@145: 		private double sirka;
franta-hg@145: 		private double delka;
franta-hg@145: 
franta-hg@145: 		@Override
franta-hg@145: 		public String toString() {
franta-hg@145: 			return "šířka = " + sirka + "; délka = " + delka + ";";
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		@Override
franta-hg@145: 		public boolean equals(Object o) {
franta-hg@145: 			if (o instanceof Souradnice) {
franta-hg@145: 				Souradnice s = (Souradnice) o;
franta-hg@145: 				return s.sirka == sirka && s.delka == delka;
franta-hg@145: 			} else {
franta-hg@145: 				return false;
franta-hg@145: 			}
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		@Override
franta-hg@145: 		public int hashCode() {
franta-hg@145: 			int hash = 5;
franta-hg@145: 			hash = 79 * hash + (int) (Double.doubleToLongBits(this.sirka) ^ (Double.doubleToLongBits(this.sirka) >>> 32));
franta-hg@145: 			hash = 79 * hash + (int) (Double.doubleToLongBits(this.delka) ^ (Double.doubleToLongBits(this.delka) >>> 32));
franta-hg@145: 			return hash;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public Souradnice(double sirka, double delka) {
franta-hg@145: 			this.sirka = sirka;
franta-hg@145: 			this.delka = delka;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public String getLoc() {
franta-hg@145: 			return "Loc: " + sirka + ", " + delka;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public double getDelka() {
franta-hg@145: 			return delka;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public double getSirka() {
franta-hg@145: 			return sirka;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public void setDelka(double delka) {
franta-hg@145: 			this.delka = delka;
franta-hg@145: 		}
franta-hg@145: 
franta-hg@145: 		public void setSirka(double sirka) {
franta-hg@145: 			this.sirka = sirka;
franta-hg@145: 		}
franta-hg@120: 	}
franta-hg@100: }