Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 4798:39885bdfc6fc

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Added calculation of the "Umhuellende" to calculation of "W fuer ungleichwertige Abfluesse". This is done by figuring out the WST columns that imfold the data and then do simple "gleichwertige" calculations from the start of the interval. This is too much because only the Qs are needed for the "Umhuellende".
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 13 Jan 2013 16:18:28 +0100
parents 5014a84c0c7d
children
rev   line source
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910b03de6857 Added a service to get some basic spatial information used for map creation.
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1 package de.intevation.flys.client.server;
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2
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3 import com.google.gwt.core.client.GWT;
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4 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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5
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6 import de.intevation.artifacts.common.utils.XMLUtils;
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7 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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8 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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9 import de.intevation.artifacts.httpclient.http.HttpClient;
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10 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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11 import de.intevation.flys.client.client.services.MapInfoService;
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12 import de.intevation.flys.client.shared.exceptions.ServerException;
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13 import de.intevation.flys.client.shared.model.BBox;
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14 import de.intevation.flys.client.shared.model.MapInfo;
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15
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16 import org.apache.log4j.Logger;
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Element;
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20
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21 /**
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22 * This service fetches a document that contains meta information for a specific
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23 * chart.
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24 *
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25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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26 */
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27 public class MapInfoServiceImpl
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28 extends RemoteServiceServlet
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29 implements MapInfoService
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30 {
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31 private static final Logger logger =
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32 Logger.getLogger(MapInfoServiceImpl.class);
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33
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34
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35 public static final String XPATH_RIVER =
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36 "/mapinfo/river/@name";
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37
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38 public static final String XPATH_SRID =
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39 "/mapinfo/river/srid/@value";
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40
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41 public static final String XPATH_BBOX =
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42 "/mapinfo/river/bbox/@value";
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43
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44 public static final String XPATH_RIVER_WMS =
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45 "/mapinfo/river/river-wms/@url";
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46
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47 public static final String XPATH_RIVER_LAYERS =
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48 "/mapinfo/river/river-wms/@layers";
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49
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50 public static final String XPATH_WMS_URL =
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51 "/mapinfo/river/background-wms/@url";
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52
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53 public static final String XPATH_WMS_LAYERS =
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54 "/mapinfo/river/background-wms/@layers";
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55
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56 public static final String ERROR_NO_MAPINFO_FOUND =
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57 "mapinfo_service_no_result";
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58
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59
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60 @Override
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61 public MapInfo getMapInfo(String locale, String river)
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62 throws ServerException
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63 {
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64 logger.info("MapInfoServiceImpl.getMapInfo");
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65
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66 String url = getServletContext().getInitParameter("server-url");
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67
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68 Document request = getRequestDocument(river, "rivermap");
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69
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70 HttpClient client = new HttpClientImpl(url, locale);
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71
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72 try {
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73 logger.debug("MapInfoServiceImpl.callService");
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74 Document result = client.callService(url, "mapinfo", request);
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75
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76 if (result == null) {
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77 logger.warn("MapInfo service returned no result.");
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78 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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79 }
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80
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81 return getMapInfo(result);
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82 }
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83 catch (ConnectionException ce) {
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84 logger.error(ce, ce);
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85 }
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86
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87 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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88 }
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89
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90
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91 public static Document getRequestDocument(String rivername, String maptypeStr) {
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92 logger.debug("MapInfoServiceImpl.getRequestDocument");
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93
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94 Document request = XMLUtils.newDocument();
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95 ElementCreator cr = new ElementCreator(request, null, null);
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96
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97 Element root = cr.create("mapinfo");
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98 Element river = cr.create("river");
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99 Element maptype = cr.create("maptype");
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100
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101 river.setTextContent(rivername);
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102 maptype.setTextContent(maptypeStr);
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103
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104 request.appendChild(root);
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105 root.appendChild(river);
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106 root.appendChild(maptype);
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107
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108 return request;
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109 }
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110
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111
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112 public static MapInfo getMapInfo(Document result) {
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113 logger.debug("MapInfoServiceImpl.getMapInfo");
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114
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115 String river = XMLUtils.xpathString(result, XPATH_RIVER, null);
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116 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
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117 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null);
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118 BBox bbox = BBox.getBBoxFromString(bboxS);
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119
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120 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null);
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121 String riverLayers = XMLUtils.xpathString(result, XPATH_RIVER_LAYERS, null);
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122 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null);
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123 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null);
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124
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125 int srid = 4326;
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126
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127 try {
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128 srid = Integer.parseInt(sridStr);
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129 }
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130 catch (NumberFormatException nfe) {
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131 GWT.log("Could not parse SRID String: " + sridStr);
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132 }
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133
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134 return new MapInfo(
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135 river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers);
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136 }
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137 }
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138 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org