Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 2708:282db12a5bdf
Adapted the dynamic DESCRIBE creation of MultiIntArrayState to be able to use default mechanisms in FLYS client.
flys-artifacts/trunk@4430 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 16 May 2012 14:56:28 +0000 |
parents | e92bc9b0ca1d |
children | df4d6b286af8 |
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.util.Iterator; |
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4 |
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5 import org.apache.log4j.Logger; |
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6 |
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7 import org.w3c.dom.Document; |
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8 import org.w3c.dom.Element; |
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9 |
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10 import de.intevation.artifacts.CallMeta; |
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11 import de.intevation.artifacts.GlobalContext; |
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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 |
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16 import de.intevation.flys.model.FastAnnotations; |
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18 import de.intevation.flys.artifacts.model.LocationProvider; |
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19 |
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20 |
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21 /** |
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22 * This service provides information about distances of a specified river. |
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23 * |
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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25 */ |
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26 public class DistanceInfoService extends FLYSService { |
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27 |
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28 /** The logger used in this service. */ |
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29 private static Logger logger = Logger.getLogger(DistanceInfoService.class); |
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30 |
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31 public static final String RIVER_XPATH = "/art:river/text()"; |
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32 |
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33 public static final String FILTER_XPATH = "/art:river/art:filter/text()"; |
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34 |
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35 |
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36 /** |
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37 * The default constructor. |
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38 */ |
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39 public DistanceInfoService() { |
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40 } |
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41 |
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42 |
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43 @Override |
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44 public Document doProcess( |
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45 Document data, |
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46 GlobalContext globalContext, |
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47 CallMeta callMeta |
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48 ) { |
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49 logger.debug("DistanceInfoService.process"); |
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50 |
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51 String river = XMLUtils.xpathString( |
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52 data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); |
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53 |
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54 String filterName = XMLUtils.xpathString( |
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55 data, FILTER_XPATH, ArtifactNamespaceContext.INSTANCE); |
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56 |
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57 if (river == null || (river = river.trim()).length() == 0) { |
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58 logger.warn("No river specified. Cannot return distance info!"); |
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59 return XMLUtils.newDocument(); |
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60 } |
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61 |
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62 logger.debug("Search distances for river: " + river); |
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63 |
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64 FastAnnotations fas = LocationProvider.getAnnotations(river); |
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65 |
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66 FastAnnotations.Filter filter = selectFilter(filterName); |
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67 |
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68 return buildDocument(fas.filter(filter)); |
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69 } |
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70 |
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71 protected Document buildDocument( |
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72 Iterator<FastAnnotations.Annotation> iter |
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73 ) { |
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74 Document result = XMLUtils.newDocument(); |
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75 |
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76 Element all = result.createElement("distances"); |
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77 |
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78 while (iter.hasNext()) { |
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79 all.appendChild(buildNode(result, iter.next())); |
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80 } |
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81 |
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82 result.appendChild(all); |
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83 |
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84 return result; |
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85 } |
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86 |
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87 protected static FastAnnotations.Filter selectFilter(String name) { |
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88 |
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89 if (name != null) { |
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90 if ("locations".equals(name)) return FastAnnotations.IS_POINT; |
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91 if ("distances".equals(name)) return FastAnnotations.IS_RANGE; |
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92 } |
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93 |
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94 return FastAnnotations.ALL; |
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95 } |
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96 |
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97 /** |
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98 * Builds an Element for a distance info. |
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99 * |
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100 * @param an The Annotation that provides information about the distance. |
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101 * |
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102 * @return an Element that contains information about a distance. |
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103 */ |
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104 protected static Element buildNode( |
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105 Document document, |
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106 FastAnnotations.Annotation an |
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107 ) { |
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108 Element distance = document.createElement("distance"); |
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109 |
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110 distance.setAttribute("description", an.getPosition()); |
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111 |
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112 String riverSide = an.getAttribute(); |
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113 |
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114 if (riverSide != null && riverSide.length() > 0) { |
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115 distance.setAttribute("riverside", riverSide); |
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116 } |
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117 |
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118 distance.setAttribute("from", String.valueOf(an.getA())); |
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119 |
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120 double b = an.getB(); |
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121 double bottom = an.getBottom(); |
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122 double top = an.getTop(); |
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123 |
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124 if (!Double.isNaN(b)) { |
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125 distance.setAttribute("to", String.valueOf(b)); |
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126 } |
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127 |
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128 if (!Double.isNaN(bottom)) { |
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129 distance.setAttribute("bottom", String.valueOf(bottom)); |
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130 } |
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131 |
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132 if (!Double.isNaN(top)) { |
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133 distance.setAttribute("top", String.valueOf(top)); |
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134 } |
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135 |
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136 return distance; |
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137 } |
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138 } |
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139 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |