Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 2145:e92bc9b0ca1d

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DistanceInfoService now uses annotations from LocationProvider. flys-artifacts/trunk@3724 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 19 Jan 2012 15:43:57 +0000
parents 26e19cdaed5e
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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16 import de.intevation.flys.model.FastAnnotations;
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18 import de.intevation.flys.artifacts.model.LocationProvider;
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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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28 /** The logger used in this service. */
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29 private static Logger logger = Logger.getLogger(DistanceInfoService.class);
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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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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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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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64 FastAnnotations fas = LocationProvider.getAnnotations(river);
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66 FastAnnotations.Filter filter = selectFilter(filterName);
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68 return buildDocument(fas.filter(filter));
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69 }
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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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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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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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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
123
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
124 if (!Double.isNaN(b)) {
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
125 distance.setAttribute("to", String.valueOf(b));
686
3dc61e00385e Merged with trunk and introduced hashing of computed values.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
126 }
2145
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
127
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
128 if (!Double.isNaN(bottom)) {
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
129 distance.setAttribute("bottom", String.valueOf(bottom));
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
130 }
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
131
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
132 if (!Double.isNaN(top)) {
e92bc9b0ca1d DistanceInfoService now uses annotations from LocationProvider.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1631
diff changeset
133 distance.setAttribute("top", String.valueOf(top));
686
3dc61e00385e Merged with trunk and introduced hashing of computed values.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
134 }
301
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
135
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
136 return distance;
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
137 }
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
138 }
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
139 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org