Mercurial > dive4elements > river
comparison flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 828:910b03de6857
Added a service to get some basic spatial information used for map creation.
flys-client/trunk@2529 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Tue, 23 Aug 2011 09:43:12 +0000 |
| parents | |
| children | ab8eb2f544f2 |
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| 827:bd56dc762e7f | 828:910b03de6857 |
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| 1 package de.intevation.flys.client.server; | |
| 2 | |
| 3 import org.w3c.dom.Document; | |
| 4 import org.w3c.dom.Element; | |
| 5 | |
| 6 import com.google.gwt.user.server.rpc.RemoteServiceServlet; | |
| 7 | |
| 8 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 9 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; | |
| 10 | |
| 11 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; | |
| 12 import de.intevation.artifacts.httpclient.http.HttpClient; | |
| 13 import de.intevation.artifacts.httpclient.http.HttpClientImpl; | |
| 14 | |
| 15 import de.intevation.flys.client.shared.exceptions.ServerException; | |
| 16 import de.intevation.flys.client.shared.model.BBox; | |
| 17 import de.intevation.flys.client.shared.model.MapInfo; | |
| 18 | |
| 19 import de.intevation.flys.client.client.services.MapInfoService; | |
| 20 | |
| 21 | |
| 22 /** | |
| 23 * This service fetches a document that contains meta information for a specific | |
| 24 * chart. | |
| 25 * | |
| 26 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 27 */ | |
| 28 public class MapInfoServiceImpl | |
| 29 extends RemoteServiceServlet | |
| 30 implements MapInfoService | |
| 31 { | |
| 32 public static final String XPATH_RIVER = | |
| 33 "/mapinfo/river/@name"; | |
| 34 | |
| 35 public static final String XPATH_SRID = | |
| 36 "/mapinfo/river/srid/@value"; | |
| 37 | |
| 38 public static final String XPATH_BBOX = | |
| 39 "/mapinfo/river/bbox/@value"; | |
| 40 | |
| 41 public static final String XPATH_RIVER_WMS = | |
| 42 "/mapinfo/river/river-wms/@url"; | |
| 43 | |
| 44 public static final String XPATH_WMS_URL = | |
| 45 "/mapinfo/river/background-wms/@url"; | |
| 46 | |
| 47 public static final String XPATH_WMS_LAYERS = | |
| 48 "/mapinfo/river/background-wms/@layers"; | |
| 49 | |
| 50 public static final String ERROR_NO_MAPINFO_FOUND = | |
| 51 "mapinfo_service_no_result"; | |
| 52 | |
| 53 | |
| 54 public MapInfo getMapInfo(String url, String locale, String river) | |
| 55 throws ServerException | |
| 56 { | |
| 57 System.out.println("MapInfoServiceImpl.getMapInfo"); | |
| 58 | |
| 59 Document request = getRequestDocument(river);; | |
| 60 | |
| 61 HttpClient client = new HttpClientImpl(url, locale); | |
| 62 | |
| 63 try { | |
| 64 System.out.println("MapInfoServiceImpl.callService"); | |
| 65 Document result = client.callService(url, "mapinfo", request); | |
| 66 | |
| 67 if (result == null) { | |
| 68 System.err.println("MapInfo service returned no result."); | |
| 69 throw new ServerException(ERROR_NO_MAPINFO_FOUND); | |
| 70 } | |
| 71 | |
| 72 return getMapInfo(result); | |
| 73 } | |
| 74 catch (ConnectionException ce) { | |
| 75 System.err.println(ce.getLocalizedMessage()); | |
| 76 } | |
| 77 | |
| 78 throw new ServerException(ERROR_NO_MAPINFO_FOUND); | |
| 79 } | |
| 80 | |
| 81 | |
| 82 public static Document getRequestDocument(String rivername) { | |
| 83 System.out.println("MapInfoServiceImpl.getRequestDocument"); | |
| 84 | |
| 85 Document request = XMLUtils.newDocument(); | |
| 86 ElementCreator cr = new ElementCreator(request, null, null); | |
| 87 | |
| 88 Element root = cr.create("mapinfo"); | |
| 89 Element river = cr.create("river"); | |
| 90 | |
| 91 river.setTextContent(rivername); | |
| 92 | |
| 93 request.appendChild(root); | |
| 94 root.appendChild(river); | |
| 95 | |
| 96 return request; | |
| 97 } | |
| 98 | |
| 99 | |
| 100 public static MapInfo getMapInfo(Document result) { | |
| 101 System.out.println("MapInfoServiceImpl.getMapInfo"); | |
| 102 | |
| 103 String river = XMLUtils.xpathString(result, XPATH_RIVER, null); | |
| 104 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null); | |
| 105 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null); | |
| 106 BBox bbox = BBox.getBBoxFromString(bboxS); | |
| 107 | |
| 108 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null); | |
| 109 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null); | |
| 110 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null); | |
| 111 | |
| 112 int srid = 4326; | |
| 113 | |
| 114 try { | |
| 115 srid = Integer.parseInt(sridStr); | |
| 116 } | |
| 117 catch (NumberFormatException nfe) { | |
| 118 // do nothing | |
| 119 } | |
| 120 | |
| 121 return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers); | |
| 122 } | |
| 123 } | |
| 124 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |