Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 451:73bc64c4a7b0
Use new logic to calculate "W für ungleichwertige Abfluesse". Not working yet.
flys-artifacts/trunk@1946 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 18 May 2011 17:37:06 +0000 |
parents | 4aa078e28cfd |
children | 02c0cce0e469 |
rev | line source |
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1 package de.intevation.flys.artifacts.services; |
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2 |
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3 import java.math.BigDecimal; |
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4 import java.util.List; |
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5 |
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6 import org.apache.log4j.Logger; |
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7 |
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8 import org.w3c.dom.Document; |
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9 import org.w3c.dom.Element; |
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10 |
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11 import de.intevation.artifacts.CallMeta; |
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12 |
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13 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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14 import de.intevation.artifacts.common.utils.XMLUtils; |
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15 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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16 |
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17 import de.intevation.artifactdatabase.DefaultService; |
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18 |
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19 import de.intevation.flys.backend.SessionHolder; |
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20 import de.intevation.flys.model.Annotation; |
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21 import de.intevation.flys.model.Attribute; |
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22 import de.intevation.flys.model.Position; |
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23 import de.intevation.flys.model.Range; |
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24 |
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25 import de.intevation.flys.artifacts.model.AnnotationsFactory; |
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26 |
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27 import org.hibernate.Session; |
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28 |
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29 /** |
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30 * This service provides information about distances of a specified river. |
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31 * |
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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33 */ |
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34 public class DistanceInfoService extends DefaultService { |
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35 |
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36 /** The logger used in this service.*/ |
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37 private static Logger logger = Logger.getLogger(DistanceInfoService.class); |
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38 |
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39 |
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40 /** |
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41 * The default constructor. |
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42 */ |
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43 public DistanceInfoService() { |
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44 } |
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45 |
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46 |
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47 public Document process( |
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48 Document data, |
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49 Object globalContext, |
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50 CallMeta callMeta) |
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51 { |
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52 logger.debug("DistanceInfoService.process"); |
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53 |
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54 Document result = XMLUtils.newDocument(); |
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55 |
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56 String river = XMLUtils.xpathString( |
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57 data, "/art:river/text()", ArtifactNamespaceContext.INSTANCE); |
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58 |
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59 if (river == null || river.trim().length() == 0) { |
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60 logger.warn("No river specified. Cannot return distance info!"); |
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61 return result; |
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62 } |
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63 |
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64 logger.debug("Search distances for river: " + river); |
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65 |
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66 ElementCreator ec = new ElementCreator( |
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67 result, |
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68 ArtifactNamespaceContext.NAMESPACE_URI, |
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69 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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70 |
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71 Session session = SessionHolder.acquire(); |
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72 try { |
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73 List<Annotation> annotations = AnnotationsFactory.getAnnotations(river); |
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74 |
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75 if (annotations == null || annotations.size() == 0) { |
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76 logger.warn("No information found for the specified river!"); |
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77 return result; |
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78 } |
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79 |
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80 Element all = ec.create("distances"); |
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81 |
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82 for (Annotation a: annotations) { |
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83 Element distance = buildDistanceNode(ec, a); |
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84 |
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85 if (distance != null) { |
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86 all.appendChild(distance); |
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87 } |
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88 } |
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89 |
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90 result.appendChild(all); |
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91 } |
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92 finally { |
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93 session.close(); |
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94 SessionHolder.release(); |
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95 } |
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96 |
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97 return result; |
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98 } |
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99 |
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100 |
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101 /** |
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102 * This method build an Element for a distance info. |
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103 * |
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104 * @param ec The ElementCreator. |
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105 * @param anno The Annotation that provides information about the distance. |
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106 * |
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107 * @return an Element that contains information about a distance. |
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108 */ |
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109 protected Element buildDistanceNode(ElementCreator ec, Annotation anno) { |
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110 Position pos = anno.getPosition(); |
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111 Range range = anno.getRange(); |
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112 Attribute attr = anno.getAttribute(); |
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113 |
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114 BigDecimal a = range.getA(); |
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115 BigDecimal b = range.getB(); |
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116 |
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117 Element distance = ec.create("distance"); |
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118 ec.addAttr(distance, "description", pos.getValue(), true); |
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119 ec.addAttr(distance, "from", a != null ? a.toString() : "", true); |
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120 ec.addAttr(distance, "to", b != null ? b.toString() : "", true); |
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121 ec.addAttr(distance, "riverside", attr.getValue(), true); |
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122 |
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123 return distance; |
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124 } |
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125 } |
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126 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |