Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/MapInfoServiceImpl.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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11 import com.google.gwt.core.client.GWT;
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12 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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13
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14 import org.dive4elements.artifacts.common.utils.XMLUtils;
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15 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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16 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
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17 import org.dive4elements.artifacts.httpclient.http.HttpClient;
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18 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
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19 import org.dive4elements.river.client.client.services.MapInfoService;
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20 import org.dive4elements.river.client.shared.exceptions.ServerException;
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21 import org.dive4elements.river.client.shared.model.BBox;
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22 import org.dive4elements.river.client.shared.model.MapInfo;
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23
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24 import org.apache.logging.log4j.Logger;
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25 import org.apache.logging.log4j.LogManager;
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26 import org.w3c.dom.Document;
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27 import org.w3c.dom.Element;
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29
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30 /**
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31 * This service fetches a document that contains meta information for a specific
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32 * chart.
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33 *
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class MapInfoServiceImpl
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37 extends RemoteServiceServlet
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38 implements MapInfoService
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39 {
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40 private static final Logger log =
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41 LogManager.getLogger(MapInfoServiceImpl.class);
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42
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43
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44 public static final String XPATH_RIVER =
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45 "/mapinfo/river/@name";
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46
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47 public static final String XPATH_SRID =
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48 "/mapinfo/river/srid/@value";
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49
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50 public static final String XPATH_BBOX =
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51 "/mapinfo/river/bbox/@value";
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52
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53 public static final String XPATH_RIVER_WMS =
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54 "/mapinfo/river/river-wms/@url";
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55
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56 public static final String XPATH_RIVER_LAYERS =
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57 "/mapinfo/river/river-wms/@layers";
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58
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59 public static final String XPATH_WMS_URL =
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60 "/mapinfo/river/background-wms/@url";
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61
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62 public static final String XPATH_WMS_LAYERS =
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63 "/mapinfo/river/background-wms/@layers";
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64
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65 public static final String ERROR_NO_MAPINFO_FOUND =
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66 "mapinfo_service_no_result";
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67
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68
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69 @Override
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70 public MapInfo getMapInfo(String locale, String river)
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71 throws ServerException
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72 {
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73 log.info("MapInfoServiceImpl.getMapInfo");
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74
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75 String url = getServletContext().getInitParameter("server-url");
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76
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77 Document request = getRequestDocument(river, "rivermap");
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78
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79 HttpClient client = new HttpClientImpl(url, locale);
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80
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81 try {
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82 log.debug("MapInfoServiceImpl.callService");
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83 Document result = client.callService(url, "mapinfo", request);
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84
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85 if (result == null) {
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86 log.warn("MapInfo service returned no result.");
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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 return getMapInfo(result);
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91 }
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92 catch (ConnectionException ce) {
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93 log.error(ce, ce);
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94 }
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95
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96 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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97 }
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98
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99
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100 public static Document getRequestDocument(
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101 String rivername,
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102 String maptypeStr
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103 ) {
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104 log.debug("MapInfoServiceImpl.getRequestDocument");
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105
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106 Document request = XMLUtils.newDocument();
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107 ElementCreator cr = new ElementCreator(request, null, null);
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108
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109 Element root = cr.create("mapinfo");
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110 Element river = cr.create("river");
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111 Element maptype = cr.create("maptype");
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112
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113 river.setTextContent(rivername);
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114 maptype.setTextContent(maptypeStr);
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115
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116 request.appendChild(root);
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117 root.appendChild(river);
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118 root.appendChild(maptype);
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119
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120 return request;
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121 }
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122
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123
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124 public static MapInfo getMapInfo(Document result) {
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125 log.debug("MapInfoServiceImpl.getMapInfo");
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126
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127 String river = XMLUtils.xpathString(result, XPATH_RIVER, null);
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128 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
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129 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null);
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130 BBox bbox = BBox.getBBoxFromString(bboxS);
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131
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132 String riverWMS = XMLUtils.xpathString(
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133 result, XPATH_RIVER_WMS, null);
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134 String riverLayers = XMLUtils.xpathString(
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135 result, XPATH_RIVER_LAYERS, null);
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136 String wmsURL = XMLUtils.xpathString(
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137 result, XPATH_WMS_URL, null);
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138 String wmsLayers = XMLUtils.xpathString(
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139 result, XPATH_WMS_LAYERS, null);
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140
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141 int srid = 4326;
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142
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143 try {
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144 srid = Integer.parseInt(sridStr);
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145 }
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146 catch (NumberFormatException nfe) {
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147 GWT.log("Could not parse SRID String: " + sridStr);
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148 }
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149
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150 return new MapInfo(
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151 river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers);
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152 }
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153 }
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154 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org