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 org.gvsig.catalog.loaders;

import java.net.MalformedURLException;

import java.util.HashMap;

import java.util.Map;

import org.gvsig.andami.PluginServices;

import org.gvsig.app.project.documents.view.gui.BaseView;

import org.gvsig.catalog.schemas.Resource;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.store.catalog.CatalogStoreParameters;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.i18n.Messages;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.utils.extensionPointsOld.ExtensionPointsSingleton;

/**

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

 * 

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

 */

public class WFSLayerLoader extends GvSigLayerLoader{

        public static final String DYNFIELDNAME_URL = "url";

        public static final String DYNFIELDNAME_VERSION = "version";

        public static final String DYNFIELDNAME_TYPENAME = "typeName";

        public static final String DYNFIELDNAME_NAMESPACE = "namespace";

        public static final String DYNFIELDNAME_NAMESPACEPREFIX = "namespacePrefix";

        public static final String DYNFIELDNAME_FIELDS = "fields";

        public static final String DYNFIELDNAME_FILTERENCODING = "filterEncoding";

        public static final String DYNFIELDNAME_MAXFEATURES = "maxFeatures";

        public static final String DYNFIELDNAME_TIMEOUT = "timeOut";

        public static final String DYNFIELDNAME_USER = "user";

        public static final String DYNFIELDNAME_PASSWORD = "password";

        public WFSLayerLoader(Resource resource) {

                super(resource);

        }

        /**

         * This function loads a WFS resource 

         * @param host

         * URL where the server is located

         * @param layer

         * Layer name

         * @throws LayerLoaderException 

         */

        public void loadLayer() throws LayerLoaderException {

                DataStoreParameters storeParameters = null;

                String host = getResource().getLinkage();

                String featureType = getResource().getName();

                try {

                        storeParameters = createWFSStoreParameters(host, featureType);

                        addLayerToView(featureType, storeParameters);

                } catch (MalformedURLException e) {

                        throw new LayerLoaderException(e.getMessage(),getWindowMessage());

                } catch (Exception e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                        throw new LayerLoaderException(e.getMessage(),getWindowMessage());

                }                

        }

        private DataStoreParameters createWFSStoreParameters(String host, String featureType) throws Exception{

                CatalogStoreParameters dataStoreParameters = new CatalogStoreParameters();

                dataStoreParameters.setDynValue(DYNFIELDNAME_URL, host);

                int index = featureType.indexOf(":");

                if (index > 0){

                        dataStoreParameters.setDynValue(DYNFIELDNAME_NAMESPACEPREFIX, featureType.substring(0, index));

                }

                dataStoreParameters.setDynValue(DYNFIELDNAME_TYPENAME, featureType);

                dataStoreParameters.setDynValue(DYNFIELDNAME_USER, "");

                dataStoreParameters.setDynValue(DYNFIELDNAME_PASSWORD, "");

                ExtensionPointManager extensionPointManager = ToolsLocator

                .getExtensionPointManager();

                ExtensionPoint extensionPoint = extensionPointManager.add("CatalogDataStoreParameters");

                Object[] args = new Object[1];

                args[0] = dataStoreParameters;

                try {

                        return (DataStoreParameters)extensionPoint.create("OGC:WFS", args);

                } catch(Exception e) {

                        e.printStackTrace();

                        throw new LayerLoaderException(getErrorMessage(),getWindowMessage());

                }                

        }

        /*

         *  (non-Javadoc)

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

         */

        protected String getErrorMessage() {

                return Messages.getText("wfsError") + ".\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("wfsLoad");

        }

}