Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ShapeDataCollector.java @ 778:9a828e5a2390
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gnv-artifacts/trunk@851 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 07:58:51 +0000 |
parents | a0e63136954e |
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1 package de.intevation.gnv.exports; |
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2 |
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3 import org.apache.log4j.Logger; |
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4 |
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5 import com.vividsolutions.jts.io.WKTReader; |
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6 import com.vividsolutions.jts.io.ParseException; |
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7 import com.vividsolutions.jts.geom.Point; |
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8 |
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9 import de.intevation.gnv.geobackend.base.Result; |
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10 import de.intevation.gnv.state.exception.StateException; |
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11 |
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12 |
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13 /** |
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14 * This class is a specialization of {@link #DefaultDataCollector}. The |
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15 * difference between these classes is, that this class extracts points served |
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16 * by a wkt string. |
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17 * |
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18 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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19 */ |
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20 public class ShapeDataCollector |
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21 extends DefaultDataCollector |
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22 { |
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23 /** |
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24 * Logger used for logging with log4j. |
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25 */ |
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26 private Logger log = Logger.getLogger(ShapeDataCollector.class); |
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27 |
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28 /** |
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29 * WKTReader to parse points from wkt strings. |
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30 */ |
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31 protected WKTReader wktReader = new WKTReader(); |
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32 |
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33 /** |
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34 * Constructor |
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35 * |
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36 * @param names Attributes used to be extracted. |
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37 */ |
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38 public ShapeDataCollector(String[] names) { |
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39 super(names); |
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40 } |
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41 |
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42 /** |
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43 * This method takes point from wkt strings as well and split them into x |
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44 * and y coordinate. |
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45 * |
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46 * @see de.intevation.gnv.exports.Export.DataCollector#getData(Result) |
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47 */ |
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48 public String[] getData(Result result) |
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49 throws StateException { |
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50 |
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51 if (rd == null) |
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52 init(result); |
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53 |
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54 try { |
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55 String [] entries = new String[names.length+1]; |
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56 int j = 0; |
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57 for (int i = 0; i < names.length; i++) { |
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58 |
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59 if (names[i].equals("SHAPE")) { |
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60 Point p = (Point)wktReader.read(result.getString("SHAPE")); |
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61 |
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62 entries[j++] = ""+p.getX(); |
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63 entries[j++] = ""+p.getY(); |
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64 } |
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65 else { |
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66 entries[j++] = result.getString(names[i]); |
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67 } |
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68 } |
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69 |
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70 return entries; |
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71 } |
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72 catch (ParseException pe) { |
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73 log.error(pe, pe); |
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74 throw new StateException( |
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75 "Error occured while parsing a Point from WKT."); |
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76 } |
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77 } |
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78 } |
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79 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |