view gwt-client/src/main/java/org/dive4elements/river/client/server/MapInfoServiceImpl.java @ 5948:d7b9b3e3c61a

Make instantiation of saml.User easier. Most of the parameters of the constructor can be taken from the Assertion object, so there's no reason to pass them separately. Also, trying to check the validity dates isn't useful for the single sign on case. See comments in the hasExpired method.
author Bernhard Herzog <bh@intevation.de>
date Wed, 08 May 2013 17:56:14 +0200
parents 172338b1407f
children ea9eef426962
line wrap: on
line source
/* 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 com.google.gwt.core.client.GWT;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

import org.dive4elements.artifacts.common.utils.XMLUtils;
import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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.MapInfoService;
import org.dive4elements.river.client.shared.exceptions.ServerException;
import org.dive4elements.river.client.shared.model.BBox;
import org.dive4elements.river.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 :

http://dive4elements.wald.intevation.org