Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/exports/ShapeDataCollector.java @ 1087:92fce3b3d07f

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Centered histograms in pdf exports. gnv-artifacts/trunk@1189 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 10 Jun 2010 09:23:33 +0000
parents 22c18083225e
children f953c9a559d8
rev   line source
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c8ecc0c0bcb4 Renaming HorizontalProfileDataCollector into ShapeDataCollector.
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1 package de.intevation.gnv.exports;
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2
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3 import com.vividsolutions.jts.geom.Point;
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5 import com.vividsolutions.jts.io.ParseException;
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6 import com.vividsolutions.jts.io.WKTReader;
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8 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 import org.apache.log4j.Logger;
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14 /**
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15 * This class is a specialization of <code>DefaultDataCollector</code>. The
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16 * difference between these classes is, that this class extracts points served
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17 * by a wkt string.
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18 *
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19 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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20 */
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21 public class ShapeDataCollector
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22 extends DefaultDataCollector
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23 {
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24 /**
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25 * Logger used for logging with log4j.
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26 */
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27 private Logger log = Logger.getLogger(ShapeDataCollector.class);
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28
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29 /**
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30 * WKTReader to parse points from wkt strings.
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31 */
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32 protected WKTReader wktReader = new WKTReader();
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33
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34 /**
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35 * Constructor
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36 *
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37 * @param names Attributes used to be extracted.
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38 */
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39 public ShapeDataCollector(String[] names) {
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40 super(names);
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41 }
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42
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43 /**
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44 * This method takes point from wkt strings as well and split them into x
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45 * and y coordinate.
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46 *
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47 * @see de.intevation.gnv.exports.Export.DataCollector#getData(Result)
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48 */
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49 public String[] getData(Result result)
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50 throws StateException {
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51
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52 if (rd == null)
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53 init(result);
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54
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55 try {
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56 String [] entries = new String[names.length+1];
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57 int j = 0;
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58 for (int i = 0; i < names.length; i++) {
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59
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60 if (names[i].equals("SHAPE")) {
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61 Point p = (Point)wktReader.read(result.getString("SHAPE"));
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62
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63 entries[j++] = ""+p.getX();
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64 entries[j++] = ""+p.getY();
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65 }
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66 else {
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67 entries[j++] = result.getString(names[i]);
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68 }
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69 }
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70
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71 return entries;
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72 }
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73 catch (ParseException pe) {
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74 log.error(pe, pe);
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75 throw new StateException(
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76 "Error occured while parsing a Point from WKT.");
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77 }
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78 }
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79 }
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80 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org