Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/GaugeDischargeCurveFacet.java @ 4128:11c589d68f13

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Fix for NPE in FLYSWorkspace.bringUp() #933
author Christian Lins <christian.lins@intevation.de>
date Sun, 14 Oct 2012 10:15:50 +0200
parents a5e1ca620f15
children 21f4e4b79121
rev   line source
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.Arrays;
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4 import java.util.Map;
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5
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6 import de.intevation.artifacts.Artifact;
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7 import de.intevation.artifacts.CallContext;
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8
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9 import de.intevation.artifactdatabase.state.DefaultFacet;
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10 import de.intevation.artifactdatabase.state.Facet;
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11
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12 import de.intevation.flys.artifacts.FLYSArtifact;
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13
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14 import de.intevation.flys.model.Gauge;
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15
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16 import de.intevation.flys.utils.FLYSUtils;
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17
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18 import org.apache.log4j.Logger;
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19
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20 /**
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21 * A Facet that returns discharge curve data at a gauge
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22 *
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23 * @author <a href="mailto:bjoern.ricks@intevation.de">Björn Ricks</a>
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24 */
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25 public class GaugeDischargeCurveFacet
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26 extends DefaultFacet
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27 implements FacetTypes
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28 {
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29 private static final Logger log =
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30 Logger.getLogger(GaugeDischargeCurveFacet.class);
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31
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32 public GaugeDischargeCurveFacet(String description) {
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33 super(0, GAUGE_DISCHARGE_CURVE, description);
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34 }
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35
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36 @Override
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37 public Object getData(Artifact art, CallContext context) {
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38
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39 if (!(art instanceof FLYSArtifact)) {
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40 log.warn("Invalid artifact type");
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41 return null;
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42 }
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43
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44 FLYSArtifact flys = (FLYSArtifact)art;
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45
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46 String river = flys.getDataAsString("river");
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47
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48 Gauge gauge = FLYSUtils.getReferenceGauge(flys);
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49
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50 if (river == null || gauge == null) {
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51 log.warn("Unknown river or gauge");
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52 return null;
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53 }
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54
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55 String name = gauge.getName();
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56
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57 DischargeTables dt = new DischargeTables(river, name);
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58
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59 Map<String, double [][]> map = dt.getValues(100d);
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60
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61 double [][] values = map.get(name);
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62 if (values == null) {
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63 return null;
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64 }
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65 double [] kms = new double[values[0].length];
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66 Arrays.fill(kms, gauge.getStation().doubleValue());
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67 return new WQKms(kms, values[0], values[1], name);
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68 }
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69
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70 @Override
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71 public Facet deepCopy() {
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72 GaugeDischargeCurveFacet copy = new GaugeDischargeCurveFacet(
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73 this.description);
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74 copy.set(this);
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75 return copy;
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76 }
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77 }
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