Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 5583:523cd27b4c42
Element.getAttributeNS() does not return null values.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Fri, 05 Apr 2013 23:16:31 +0200 |
parents | 5014a84c0c7d |
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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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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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19 |
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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 : |