Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/MapInfoService.java @ 4173:7d4480c0e68e

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Allow users to select the current relevant discharge table in historical discharge table calculattion. In addition to this, the discharge tables in the helper panel displayed in the client is ordered in time.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 18 Oct 2012 12:13:48 +0200
parents 8e66293c5369
children 6aa1b8abe2d3
rev   line source
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c37084f31c84 Implemented a MapInfo service that returns some basic information to create maps for specific rivers.
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1 package de.intevation.flys.artifacts.services;
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2
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3 import org.apache.log4j.Logger;
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4
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5 import java.util.Map;
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6 import java.util.HashMap;
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7
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8 import org.w3c.dom.Document;
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9 import org.w3c.dom.Node;
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10 import org.w3c.dom.Element;
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11
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12 import javax.xml.xpath.XPathConstants;
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13
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14 import com.vividsolutions.jts.geom.Envelope;
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15
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16 import de.intevation.artifacts.CallMeta;
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17 import de.intevation.artifacts.GlobalContext;
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18
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19 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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20 import de.intevation.artifacts.common.utils.Config;
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21 import de.intevation.artifacts.common.utils.XMLUtils;
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22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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23
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24 import de.intevation.artifactdatabase.XMLService;
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25
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26 import de.intevation.flys.utils.GeometryUtils;
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27
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28 /**
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29 * This service provides information about the supported rivers by this
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30 * application.
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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 MapInfoService extends XMLService {
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35
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36 /** XPath that points to the river.*/
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37 public static final String XPATH_RIVER = "/mapinfo/river/text()";
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38
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39 public static final String XPATH_RIVER_PROJECTION =
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40 "/artifact-database/floodmap/river[@name=$river]/srid/@value";
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41
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42 public static final String XPATH_RIVER_BACKGROUND =
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43 "/artifact-database/floodmap/river[@name=$river]/background-wms";
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44
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45 public static final String XPATH_RIVER_WMS =
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46 "/artifact-database/floodmap/river[@name=$river]/river-wms/@url";
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47
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48
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49 /** The logger used in this service.*/
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50 private static Logger logger = Logger.getLogger(MapInfoService.class);
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51
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52
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53 /**
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54 * The default constructor.
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55 */
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56 public MapInfoService() {
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57 }
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58
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59 protected static String getStringXPath(
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60 String query,
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61 Map<String, String> variables
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62 ) {
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63 return (String)XMLUtils.xpath(
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64 Config.getConfig(), query, XPathConstants.STRING,
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65 null, variables);
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66 }
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67
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68 protected static Node getNodeXPath(
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69 String query,
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70 Map<String, String> variables
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71 ) {
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72 return (Node)XMLUtils.xpath(
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73 Config.getConfig(), query, XPathConstants.NODE,
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74 null, variables);
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75 }
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76
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77 @Override
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78 public Document processXML(
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79 Document data,
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80 GlobalContext globalContext,
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81 CallMeta callMeta
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82 ) {
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83 logger.debug("MapInfoService.process");
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84
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85 Document result = XMLUtils.newDocument();
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86 ElementCreator cr = new ElementCreator(result, null, null);
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87
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88 Element mapinfo = cr.create("mapinfo");
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89 result.appendChild(mapinfo);
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90
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91 String river = extractRiver(data);
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92 if (river == null || river.length() == 0) {
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93 logger.warn("Cannot generate information: river is empty!");
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94 return result;
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95 }
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96
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97 Element root = cr.create("river");
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98 cr.addAttr(root, "name", river);
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99 mapinfo.appendChild(root);
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100
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101 Envelope env = GeometryUtils.getRiverBoundary(river);
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102 if (env != null) {
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103 String bounds = GeometryUtils.jtsBoundsToOLBounds(env);
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104 logger.debug("River '" + river + "' bounds: " + bounds);
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105
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106 Element bbox = cr.create("bbox");
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107 cr.addAttr(bbox, "value", bounds);
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108 root.appendChild(bbox);
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109 }
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110
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111 Map<String, String> vars = new HashMap<String, String>();
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112 vars.put("river", river);
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113
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114 String sridStr = getStringXPath(XPATH_RIVER_PROJECTION, vars);
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115
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116 if (sridStr != null && sridStr.length() > 0) {
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117 Element srid = cr.create("srid");
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118 cr.addAttr(srid, "value", sridStr);
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119 root.appendChild(srid);
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120 }
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121
2098
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122 Element back = (Element)getNodeXPath(XPATH_RIVER_BACKGROUND, vars);
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123 if (back != null) {
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124 Element background = cr.create("background-wms");
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125 cr.addAttr(background, "url", back.getAttribute("url"));
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126 cr.addAttr(background, "layers", back.getAttribute("layers"));
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127 root.appendChild(background);
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128 }
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129
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130 String wmsStr = getStringXPath(XPATH_RIVER_WMS, vars);
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131 if (wmsStr != null && wmsStr.length() > 0) {
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132 Element wms = cr.create("river-wms");
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133 cr.addAttr(wms, "url", wmsStr);
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134 root.appendChild(wms);
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135 }
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136
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137 return result;
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138 }
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139
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140
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141 protected String extractRiver(Document data) {
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142 return XMLUtils.xpathString(
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143 data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
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144 }
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145 }
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146 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org