Mercurial > dive4elements > river
diff 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> |
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date | Tue, 23 Aug 2011 09:43:12 +0000 |
parents | |
children | ab8eb2f544f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java Tue Aug 23 09:43:12 2011 +0000 @@ -0,0 +1,124 @@ +package de.intevation.flys.client.server; + +import org.w3c.dom.Document; +import org.w3c.dom.Element; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import de.intevation.artifacts.common.utils.XMLUtils; +import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; + +import de.intevation.artifacts.httpclient.exceptions.ConnectionException; +import de.intevation.artifacts.httpclient.http.HttpClient; +import de.intevation.artifacts.httpclient.http.HttpClientImpl; + +import de.intevation.flys.client.shared.exceptions.ServerException; +import de.intevation.flys.client.shared.model.BBox; +import de.intevation.flys.client.shared.model.MapInfo; + +import de.intevation.flys.client.client.services.MapInfoService; + + +/** + * This service fetches a document that contains meta information for a specific + * chart. + * + * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> + */ +public class MapInfoServiceImpl +extends RemoteServiceServlet +implements MapInfoService +{ + public static final String XPATH_RIVER = + "/mapinfo/river/@name"; + + public static final String XPATH_SRID = + "/mapinfo/river/srid/@value"; + + public static final String XPATH_BBOX = + "/mapinfo/river/bbox/@value"; + + public static final String XPATH_RIVER_WMS = + "/mapinfo/river/river-wms/@url"; + + public static final String XPATH_WMS_URL = + "/mapinfo/river/background-wms/@url"; + + public static final String XPATH_WMS_LAYERS = + "/mapinfo/river/background-wms/@layers"; + + public static final String ERROR_NO_MAPINFO_FOUND = + "mapinfo_service_no_result"; + + + public MapInfo getMapInfo(String url, String locale, String river) + throws ServerException + { + System.out.println("MapInfoServiceImpl.getMapInfo"); + + Document request = getRequestDocument(river);; + + HttpClient client = new HttpClientImpl(url, locale); + + try { + System.out.println("MapInfoServiceImpl.callService"); + Document result = client.callService(url, "mapinfo", request); + + if (result == null) { + System.err.println("MapInfo service returned no result."); + throw new ServerException(ERROR_NO_MAPINFO_FOUND); + } + + return getMapInfo(result); + } + catch (ConnectionException ce) { + System.err.println(ce.getLocalizedMessage()); + } + + throw new ServerException(ERROR_NO_MAPINFO_FOUND); + } + + + public static Document getRequestDocument(String rivername) { + System.out.println("MapInfoServiceImpl.getRequestDocument"); + + Document request = XMLUtils.newDocument(); + ElementCreator cr = new ElementCreator(request, null, null); + + Element root = cr.create("mapinfo"); + Element river = cr.create("river"); + + river.setTextContent(rivername); + + request.appendChild(root); + root.appendChild(river); + + return request; + } + + + public static MapInfo getMapInfo(Document result) { + System.out.println("MapInfoServiceImpl.getMapInfo"); + + String river = XMLUtils.xpathString(result, XPATH_RIVER, null); + String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null); + String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null); + BBox bbox = BBox.getBBoxFromString(bboxS); + + String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null); + String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null); + String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null); + + int srid = 4326; + + try { + srid = Integer.parseInt(sridStr); + } + catch (NumberFormatException nfe) { + // do nothing + } + + return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :