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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/CollectionMonitor.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 58bdf95df5e4
children 06c10ad39280
rev   line source
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1 package de.intevation.flys.artifacts;
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2
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3 import java.util.HashMap;
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4 import java.util.List;
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5 import java.util.Map;
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6
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7 import javax.xml.xpath.XPathConstants;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Element;
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11 import org.w3c.dom.Node;
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12
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13 import de.intevation.artifacts.Artifact;
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14 import de.intevation.artifacts.ArtifactNamespaceContext;
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15 import de.intevation.artifacts.CallContext;
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16 import de.intevation.artifacts.Hook;
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17
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18 import de.intevation.artifacts.common.utils.XMLUtils;
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19 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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20
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21 import de.intevation.artifactdatabase.state.Output;
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22
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23 import de.intevation.flys.artifacts.datacage.Recommendations;
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24
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25 public class CollectionMonitor implements Hook {
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26
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27 public static final String XPATH_RESULT = "/art:result";
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28
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29 @Override
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30 public void setup(Node cfg) {
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31 }
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32
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33
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34 @Override
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35 public void execute(Artifact artifact, CallContext context, Document doc) {
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36 FLYSArtifact flys = (FLYSArtifact) artifact;
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37
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38 Element result = (Element) XMLUtils.xpath(
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39 doc,
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40 XPATH_RESULT,
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41 XPathConstants.NODE,
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42 ArtifactNamespaceContext.INSTANCE);
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43
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44 ElementCreator creator = new ElementCreator(
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45 doc,
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46 ArtifactNamespaceContext.NAMESPACE_URI,
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47 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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48
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49 Element recommended = creator.create("recommended-artifacts");
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50 result.appendChild(recommended);
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51
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52 String[] outs = extractOutputNames(flys, context);
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53 Map<String, Object> params = getNoneUserSpecificParameters(flys, context);
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54
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55 Recommendations rec = Recommendations.getInstance();
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56
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57 // TODO For newer official-lines recommendations we actually
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58 // need user-id (null here).
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59 rec.recommend(flys, null, outs, params, recommended);
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60 }
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61
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62
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63 /**
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64 * Get outputnames from current state (only the ones for which
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65 * facets exist).
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66 */
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67 public static String[] extractOutputNames(
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68 FLYSArtifact flys,
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69 CallContext context)
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70 {
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71 if (flys instanceof ChartArtifact) {
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72 return new String[0];
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73 }
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74
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75 List<Output> outs = flys.getCurrentOutputs(context);
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76
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77 int num = outs == null ? 0 : outs.size();
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78
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79 String[] names = new String[num];
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80
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81 for (int i = 0; i < num; i++) {
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82 names[i] = outs.get(i).getName();
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83 }
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84
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85 return names;
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86 }
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87
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88
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89 protected Map<String, Object> getNoneUserSpecificParameters(
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90 FLYSArtifact flys,
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91 CallContext context)
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92 {
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93 Map<String, Object> params = new HashMap<String, Object>(1);
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94 params.put("recommended", "true");
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95
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96 return params;
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97 }
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98 }
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99 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org