Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/GaugeDischargeCurveFacet.java @ 5415:5bac3e75f59c

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WaterlevelSelectState: Avoid npe with extreme results.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 26 Mar 2013 09:40:05 +0100
parents dbe9b7d6b80b
children
rev   line source
3936
4e1b3b4ef132 Add new Artifacts and State for displaying discharge curves at a gauge
Bjoern Ricks <bjoern.ricks@intevation.de>
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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 name, String description) {
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33 super(0, name, 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 return getWQKms(art, context);
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39 }
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40
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41 protected WQKms getWQKms(Artifact art, CallContext context) {
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42 if (!(art instanceof FLYSArtifact)) {
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43 log.warn("Invalid artifact type");
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44 return null;
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45 }
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46
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47 FLYSArtifact flys = (FLYSArtifact)art;
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48
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49 String river = flys.getDataAsString("river");
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50
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51 Gauge gauge = FLYSUtils.getReferenceGauge(flys);
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52
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53 if (river == null || gauge == null) {
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54 log.warn("Unknown river or gauge");
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55 return null;
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56 }
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57
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58 String name = gauge.getName();
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59
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60 DischargeTables dt = new DischargeTables(river, name);
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61
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62 Map<String, double [][]> map = dt.getValues(
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63 DischargeTables.MASTER_SCALE);
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64
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65 double [][] values = map.get(name);
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66 if (values == null) {
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67 return null;
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68 }
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69 double [] kms = new double[values[0].length];
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70 Arrays.fill(kms, gauge.getStation().doubleValue());
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71 return new WQKms(kms, values[0], values[1], name);
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72 }
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73
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74 @Override
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75 public Facet deepCopy() {
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76 GaugeDischargeCurveFacet copy = new GaugeDischargeCurveFacet(
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77 this.name,
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78 this.description);
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79 copy.set(this);
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80 return copy;
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81 }
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82 }
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