Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents 5014a84c0c7d
children
rev   line source
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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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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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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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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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124
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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125 int srid = 4326;
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126
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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127 try {
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128 srid = Integer.parseInt(sridStr);
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129 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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130 catch (NumberFormatException nfe) {
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5014a84c0c7d Add "maptype" parameter to MapInfoService.
Christian Lins <christian.lins@intevation.de>
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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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5014a84c0c7d Add "maptype" parameter to MapInfoService.
Christian Lins <christian.lins@intevation.de>
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134 return new MapInfo(
5014a84c0c7d Add "maptype" parameter to MapInfoService.
Christian Lins <christian.lins@intevation.de>
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135 river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers);
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136 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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137 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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138 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org