Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 2426:f97e9b810e58 2.6.1

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merged flys-backend/2.6.1
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:26 +0200
parents bc06a671ef60
children 02cf2b1dff84
rev   line source
828
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 org.w3c.dom.Document;
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4 import org.w3c.dom.Element;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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9
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10 import de.intevation.artifacts.common.utils.XMLUtils;
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11 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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12
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13 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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14 import de.intevation.artifacts.httpclient.http.HttpClient;
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15 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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16
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17 import de.intevation.flys.client.shared.exceptions.ServerException;
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18 import de.intevation.flys.client.shared.model.BBox;
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19 import de.intevation.flys.client.shared.model.MapInfo;
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20
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21 import de.intevation.flys.client.client.services.MapInfoService;
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22
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23
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24 /**
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25 * This service fetches a document that contains meta information for a specific
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26 * chart.
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27 *
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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29 */
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30 public class MapInfoServiceImpl
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31 extends RemoteServiceServlet
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32 implements MapInfoService
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33 {
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34 private static final Logger logger =
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35 Logger.getLogger(MapInfoServiceImpl.class);
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36
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37
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38 public static final String XPATH_RIVER =
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39 "/mapinfo/river/@name";
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40
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41 public static final String XPATH_SRID =
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42 "/mapinfo/river/srid/@value";
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43
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44 public static final String XPATH_BBOX =
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45 "/mapinfo/river/bbox/@value";
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46
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47 public static final String XPATH_RIVER_WMS =
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48 "/mapinfo/river/river-wms/@url";
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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 public MapInfo getMapInfo(String locale, String river)
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61 throws ServerException
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62 {
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63 logger.info("MapInfoServiceImpl.getMapInfo");
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64
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65 String url = getServletContext().getInitParameter("server-url");
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66
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67 Document request = getRequestDocument(river);;
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68
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69 HttpClient client = new HttpClientImpl(url, locale);
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70
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71 try {
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72 logger.debug("MapInfoServiceImpl.callService");
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73 Document result = client.callService(url, "mapinfo", request);
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74
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75 if (result == null) {
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76 logger.warn("MapInfo service returned no result.");
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77 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
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78 }
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79
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80 return getMapInfo(result);
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81 }
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82 catch (ConnectionException ce) {
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83 logger.error(ce, ce);
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84 }
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85
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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
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90 public static Document getRequestDocument(String rivername) {
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91 logger.debug("MapInfoServiceImpl.getRequestDocument");
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92
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93 Document request = XMLUtils.newDocument();
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94 ElementCreator cr = new ElementCreator(request, null, null);
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95
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96 Element root = cr.create("mapinfo");
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97 Element river = cr.create("river");
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98
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99 river.setTextContent(rivername);
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100
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101 request.appendChild(root);
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102 root.appendChild(river);
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103
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104 return request;
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105 }
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106
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107
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108 public static MapInfo getMapInfo(Document result) {
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109 logger.debug("MapInfoServiceImpl.getMapInfo");
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110
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111 String river = XMLUtils.xpathString(result, XPATH_RIVER, null);
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112 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
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113 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null);
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114 BBox bbox = BBox.getBBoxFromString(bboxS);
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115
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116 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null);
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117 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null);
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118 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null);
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119
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120 int srid = 4326;
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121
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122 try {
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123 srid = Integer.parseInt(sridStr);
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124 }
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125 catch (NumberFormatException nfe) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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126 // do nothing
910b03de6857 Added a service to get some basic spatial information used for map creation.
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127 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
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128
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129 return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers);
910b03de6857 Added a service to get some basic spatial information used for map creation.
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130 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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131 }
910b03de6857 Added a service to get some basic spatial information used for map creation.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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132 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org