Mercurial > dive4elements > river
annotate gwt-client/src/main/java/org/dive4elements/river/client/server/MapInfoServiceImpl.java @ 6941:d322da01d862
(issue1451) Round Q's in the way it is done for AT's and localize KM
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Thu, 29 Aug 2013 11:28:55 +0200 |
parents | ea9eef426962 |
children | 238fc722f87a |
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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10 |
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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.log4j.Logger; |
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25 import org.w3c.dom.Document; |
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26 import org.w3c.dom.Element; |
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27 |
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28 |
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29 /** |
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30 * This service fetches a document that contains meta information for a specific |
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31 * chart. |
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32 * |
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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34 */ |
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35 public class MapInfoServiceImpl |
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36 extends RemoteServiceServlet |
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37 implements MapInfoService |
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38 { |
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39 private static final Logger logger = |
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40 Logger.getLogger(MapInfoServiceImpl.class); |
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41 |
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42 |
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43 public static final String XPATH_RIVER = |
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44 "/mapinfo/river/@name"; |
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45 |
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46 public static final String XPATH_SRID = |
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47 "/mapinfo/river/srid/@value"; |
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48 |
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49 public static final String XPATH_BBOX = |
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50 "/mapinfo/river/bbox/@value"; |
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51 |
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52 public static final String XPATH_RIVER_WMS = |
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53 "/mapinfo/river/river-wms/@url"; |
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54 |
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55 public static final String XPATH_RIVER_LAYERS = |
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56 "/mapinfo/river/river-wms/@layers"; |
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57 |
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58 public static final String XPATH_WMS_URL = |
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59 "/mapinfo/river/background-wms/@url"; |
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60 |
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61 public static final String XPATH_WMS_LAYERS = |
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62 "/mapinfo/river/background-wms/@layers"; |
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63 |
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64 public static final String ERROR_NO_MAPINFO_FOUND = |
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65 "mapinfo_service_no_result"; |
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66 |
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67 |
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68 @Override |
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69 public MapInfo getMapInfo(String locale, String river) |
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70 throws ServerException |
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71 { |
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72 logger.info("MapInfoServiceImpl.getMapInfo"); |
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73 |
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74 String url = getServletContext().getInitParameter("server-url"); |
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75 |
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76 Document request = getRequestDocument(river, "rivermap"); |
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77 |
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78 HttpClient client = new HttpClientImpl(url, locale); |
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79 |
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80 try { |
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81 logger.debug("MapInfoServiceImpl.callService"); |
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82 Document result = client.callService(url, "mapinfo", request); |
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83 |
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84 if (result == null) { |
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85 logger.warn("MapInfo service returned no result."); |
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86 throw new ServerException(ERROR_NO_MAPINFO_FOUND); |
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87 } |
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88 |
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89 return getMapInfo(result); |
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90 } |
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91 catch (ConnectionException ce) { |
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92 logger.error(ce, ce); |
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93 } |
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94 |
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95 throw new ServerException(ERROR_NO_MAPINFO_FOUND); |
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96 } |
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97 |
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98 |
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99 public static Document getRequestDocument(String rivername, String maptypeStr) { |
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100 logger.debug("MapInfoServiceImpl.getRequestDocument"); |
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101 |
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102 Document request = XMLUtils.newDocument(); |
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103 ElementCreator cr = new ElementCreator(request, null, null); |
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104 |
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105 Element root = cr.create("mapinfo"); |
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106 Element river = cr.create("river"); |
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107 Element maptype = cr.create("maptype"); |
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108 |
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109 river.setTextContent(rivername); |
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110 maptype.setTextContent(maptypeStr); |
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111 |
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112 request.appendChild(root); |
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113 root.appendChild(river); |
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114 root.appendChild(maptype); |
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115 |
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116 return request; |
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117 } |
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118 |
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119 |
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120 public static MapInfo getMapInfo(Document result) { |
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121 logger.debug("MapInfoServiceImpl.getMapInfo"); |
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122 |
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123 String river = XMLUtils.xpathString(result, XPATH_RIVER, null); |
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124 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null); |
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125 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null); |
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126 BBox bbox = BBox.getBBoxFromString(bboxS); |
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127 |
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128 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null); |
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129 String riverLayers = XMLUtils.xpathString(result, XPATH_RIVER_LAYERS, null); |
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130 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null); |
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131 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null); |
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132 |
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133 int srid = 4326; |
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134 |
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135 try { |
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136 srid = Integer.parseInt(sridStr); |
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137 } |
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138 catch (NumberFormatException nfe) { |
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139 GWT.log("Could not parse SRID String: " + sridStr); |
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140 } |
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141 |
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142 return new MapInfo( |
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143 river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers); |
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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 : |