Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/RiverServiceImpl.java @ 4467:10e7bd292c47
FlowVelocityData: Add new helper to get km/Q-double-arrays.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Fri, 09 Nov 2012 12:08:52 +0100 |
parents | fed914a42a10 |
children |
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package de.intevation.flys.client.server; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.XMLUtils; 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.RiverService; import de.intevation.flys.client.server.auth.User; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.DefaultRiver; import de.intevation.flys.client.shared.model.River; import java.util.ArrayList; import java.util.List; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; /** * This interface provides a method to list the supported rivers of the artifact * server. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class RiverServiceImpl extends RemoteServiceServlet implements RiverService { /** Private logger. */ private static final Logger logger = Logger.getLogger(RiverServiceImpl.class); /** The XPath string that points to the rivers in the resulting document.*/ public static final String XPATH_RIVERS = "/art:rivers/art:river"; /** The error message key that is thrown if an error occured while reading * the supported rivers from server.*/ public static final String ERROR_NO_RIVERS_FOUND = "error_no_rivers_found"; /** Get river list. */ @Override public River[] list(String locale) throws ServerException { String url = getServletContext().getInitParameter("server-url"); Document doc = XMLUtils.newDocument(); XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); doc.appendChild(ec.create("action")); HttpClient client = new HttpClientImpl(url, locale); try { Document res = client.callService(url, "rivers", doc); NodeList rivers = (NodeList) XMLUtils.xpath( res, XPATH_RIVERS, XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE); if (rivers == null || rivers.getLength() == 0) { throw new ServerException(ERROR_NO_RIVERS_FOUND); } int count = rivers.getLength(); List<River> theRivers = new ArrayList<River>(count); User user = this.getUser(); for (int i = 0; i < count; i++) { Element tmp = (Element)rivers.item(i); String name = tmp.getAttributeNS( ArtifactNamespaceContext.NAMESPACE_URI, "name"); if (name.length() > 0 && (user == null || user.canUseFeature("river:" + name))) { theRivers.add(new DefaultRiver(name)); } } return theRivers.toArray(new River[theRivers.size()]); } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_NO_RIVERS_FOUND); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :