Mercurial > dive4elements > river
view gwt-client/src/main/java/org/dive4elements/river/client/server/SedimentLoadInfoServiceImpl.java @ 7151:491b645123b6
issue1493: Also transform NaN X values to empty string.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 25 Sep 2013 16:28:23 +0200 |
parents | 4a12fd5c9e29 |
children | 238fc722f87a |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.client.server; import java.util.ArrayList; import java.util.List; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import org.dive4elements.artifacts.common.ArtifactNamespaceContext; import org.dive4elements.artifacts.common.utils.XMLUtils; import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; import org.dive4elements.artifacts.httpclient.http.HttpClient; import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; import org.dive4elements.river.client.client.services.SedimentLoadInfoService; import org.dive4elements.river.client.shared.exceptions.ServerException; import org.dive4elements.river.client.shared.model.SedimentLoadInfoObject; import org.dive4elements.river.client.shared.model.SedimentLoadInfoObjectImpl; /** Service to fetch info about sediment load. */ public class SedimentLoadInfoServiceImpl extends RemoteServiceServlet implements SedimentLoadInfoService { private static final Logger logger = Logger.getLogger(SedimentLoadInfoServiceImpl.class); public static final String ERROR_NO_SEDIMENTLOADINFO_FOUND = "error_no_sedimentloadinfo_found"; @Override public SedimentLoadInfoObject[] getSedimentLoadInfo( String locale, String river, String type, double startKm, double endKm) throws ServerException { logger.info("SedimentLoadInfoServiceImpl.getSedimentLoadInfo"); String url = getServletContext().getInitParameter("server-url"); Document doc = XMLUtils.newDocument(); XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX); Element riverEl = ec.create("river"); Element location = ec.create("location"); Element from = ec.create("from"); Element to = ec.create("to"); Element typeEl = ec.create("type"); riverEl.setTextContent(river); from.setTextContent(String.valueOf(startKm)); to.setTextContent(String.valueOf(endKm)); typeEl.setTextContent(type); location.appendChild(from); location.appendChild(to); riverEl.appendChild(location); riverEl.appendChild(typeEl); doc.appendChild(riverEl); HttpClient client = new HttpClientImpl(url, locale); try { Document result = client.callService(url, "sedimentloadinfo", doc); logger.debug("Extract sedimentload info objects now."); SedimentLoadInfoObject[] objects = extractSedimentLoadInfoObjects(result); if (objects != null && objects.length > 0) { return objects; } } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_NO_SEDIMENTLOADINFO_FOUND); } /** * Extracts all distance info objects from <i>result</i> document. * * @param result The document retrieved by the server. * * @return a list of DistanceInfoObjects. */ protected SedimentLoadInfoObject[] extractSedimentLoadInfoObjects( Document result) throws ServerException { NodeList list = result.getElementsByTagName("sedimentload"); if (list == null || list.getLength() == 0) { logger.warn("No sedimentload info found."); throw new ServerException(ERROR_NO_SEDIMENTLOADINFO_FOUND); } int num = list.getLength(); logger.debug("Response contains " + num + " objects."); List<SedimentLoadInfoObject> objects = new ArrayList<SedimentLoadInfoObject>(num); for (int i = 0; i < num; i++) { SedimentLoadInfoObject obj = buildSedimentLoadInfoObject( (Element)list.item(i)); if (obj != null) { objects.add(obj); } } logger.debug("Retrieved " + objects.size() + " sediment loads."); return (SedimentLoadInfoObject[]) objects.toArray(new SedimentLoadInfoObject[num]); } /** * Extracts information for a single distance info object and intializes an * DistanceInfoObject with them. * * @param node The node that contains the information. * * @return a valid DistanceInfoObject. */ protected SedimentLoadInfoObject buildSedimentLoadInfoObject(Element node) { String desc = node.getAttribute("description").trim(); String date = node.getAttribute("date").trim(); if (desc.length() > 0 && date.length() > 0) { return new SedimentLoadInfoObjectImpl(desc, date); } logger.warn("Invalid sediment load info object found."); return null; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :