Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 5818:a4ff4167be1e
Request feature info on all layers and show it as html if
the server does not return valid gml.
Non queryable layers produce an error message when the request
fails. This is good enough
author | Andre Heinecke <aheinecke@intevation.de> |
---|---|
date | Wed, 24 Apr 2013 17:33:27 +0200 |
parents | 5014a84c0c7d |
children |
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package de.intevation.flys.client.server; import com.google.gwt.core.client.GWT; 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.client.services.MapInfoService; 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 org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; /** * 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 { private static final Logger logger = Logger.getLogger(MapInfoServiceImpl.class); 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_RIVER_LAYERS = "/mapinfo/river/river-wms/@layers"; 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"; @Override public MapInfo getMapInfo(String locale, String river) throws ServerException { logger.info("MapInfoServiceImpl.getMapInfo"); String url = getServletContext().getInitParameter("server-url"); Document request = getRequestDocument(river, "rivermap"); HttpClient client = new HttpClientImpl(url, locale); try { logger.debug("MapInfoServiceImpl.callService"); Document result = client.callService(url, "mapinfo", request); if (result == null) { logger.warn("MapInfo service returned no result."); throw new ServerException(ERROR_NO_MAPINFO_FOUND); } return getMapInfo(result); } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_NO_MAPINFO_FOUND); } public static Document getRequestDocument(String rivername, String maptypeStr) { logger.debug("MapInfoServiceImpl.getRequestDocument"); Document request = XMLUtils.newDocument(); ElementCreator cr = new ElementCreator(request, null, null); Element root = cr.create("mapinfo"); Element river = cr.create("river"); Element maptype = cr.create("maptype"); river.setTextContent(rivername); maptype.setTextContent(maptypeStr); request.appendChild(root); root.appendChild(river); root.appendChild(maptype); return request; } public static MapInfo getMapInfo(Document result) { logger.debug("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 riverLayers = XMLUtils.xpathString(result, XPATH_RIVER_LAYERS, 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) { GWT.log("Could not parse SRID String: " + sridStr); } return new MapInfo( river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :