Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package es.gva.cit.gvsig.catalogClient.loaders;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.ProtocolException;

import java.util.HashMap;

import java.util.Map;

import org.exolab.castor.xml.ValidationException;

import org.gvsig.i18n.Messages;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.exceptions.layers.LoadLayerException;

import com.iver.cit.gvsig.exceptions.layers.UnsupportedVersionLayerException;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.project.documents.view.gui.View;

import com.iver.utiles.extensionPoints.ExtensionPoint;

import com.iver.utiles.extensionPoints.ExtensionPointsSingleton;

import es.gva.cit.catalogClient.schemas.discoverer.Resource;

/**

 * This class is used to load a WMS layer in gvSIG

 *

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 */

public class WMSLayerLoader extends LayerLoader{

        public WMSLayerLoader(Resource resource) {

                super(resource);

                //load(getResource().getLinkage(),getResource().getName());

        }

        /**

         * This function loads a WMS resource

         * @param host

         * URL where the server is located

         * @param sLayer

         * Layer name

         * @param crs

         * Coordenates System

         * @throws LayerLoaderException

         */

        public void loadLayer() throws LoadLayerException {

                String host = getResource().getLinkage();

                String sLayer = getResource().getName();

                FLayer flayer;

                try {

                        flayer = createWMSLayer(host, sLayer);

                        addLayerToView(flayer);

                } catch (Exception e) {

                        throw new LoadLayerException(sLayer,e);

                }

        }

        /**

         * It retrieves a getCapabilities file and loads the layer in gvSIG

         * @param host

         * WMS URL

         * @param sLayer

         * Layer Name

         * @return

         * FLayer

         * @throws ServerOutOfOrderException

         * @throws ProtocolException

         * @throws MalformedURLException

         * @throws WMSException

         * @throws IOException

         * @throws UnsupportedVersionLayerException

         * @throws ValidationException

         * @throws IllegalStateException

         * @throws LayerLoaderException

         */

        private FLayer createWMSLayer(String host, String sLayer) throws  LoadLayerException{

                ExtensionPoint extensionPoint = (ExtensionPoint)ExtensionPointsSingleton.getInstance().get("CatalogLayers");

                Map args = new HashMap();

                args.put("host",host);

                args.put("layer",sLayer);

                View activeView =

                        (View) PluginServices.getMDIManager().getActiveWindow();

                args.put("SRS",activeView.getProjection().getAbrev());

                try {

                        return (FLayer)extensionPoint.create("OGC:WMS", args  );

                } catch(Exception e) {

                        throw new LoadLayerException(sLayer,e);

                }

        }

        /*

         *  (non-Javadoc)

         * @see es.gva.cit.gvsig.catalogClient.loaders.LayerLoader#getErrorMessage()

         */

        protected String getErrorMessage() {

                return Messages.getText("wmsError") + ".\n" +

                Messages.getText("server") + ": " +

                getResource().getLinkage() + "\n" +

                Messages.getText("layer") + ": " +

                getResource().getName();

        }

        /*

         *  (non-Javadoc)

         * @see es.gva.cit.gvsig.catalogClient.loaders.LayerLoader#getWindowMessage()

         */

        protected String getWindowMessage() {

                return Messages.getText("loadWMS");

        }

}