Application: gvSIG desktop

package com.iver.cit.gvsig.fmap.drivers.wfs;

import java.io.IOException;

import java.net.ConnectException;

import java.net.URL;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.Set;

import java.util.Vector;

import org.gvsig.remoteClient.wfs.WFSClient;

import org.gvsig.remoteClient.wfs.WFSFeature;

import org.gvsig.remoteClient.wfs.WFSProtocolHandler.ServiceInformation;

import com.iver.cit.gvsig.fmap.DriverException;

import com.iver.cit.gvsig.fmap.drivers.UnsupportedVersionException;

import com.iver.cit.gvsig.fmap.drivers.WFSDriver;

import com.iver.cit.gvsig.fmap.drivers.WFSException;

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

/* 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

 */

/* CVS MESSAGES:

 *

 * $Id: FMapWFSDriver.java 4911 2006-04-20 16:38:24Z jorpiell $

 * $Log$

 * Revision 1.2  2006-04-20 16:38:24  jorpiell

 * Ahora mismo ya se puede hacer un getCapabilities y un getDescribeType de la capa seleccionada para ver los atributos a dibujar. Queda implementar el panel de opciones y hacer el getFeature().

 *

 * Revision 1.1  2006/04/19 12:50:16  jorpiell

 * Primer commit de la aplicaci?n. Se puede hacer un getCapabilities y ver el mensaje de vienvenida del servidor

 *

 *

 */

/**

 * @author Jorge Piera Llodr? (piera_jor@gva.es)

 */

public class FMapWFSDriver implements WFSDriver{

        private WFSClient client;

    private WFSLayerNode[] featuresList;

    private Hashtable features; 

        /*

         *  (non-Javadoc)

         * @see com.iver.cit.gvsig.fmap.drivers.WFSDriver#getCapabilities(java.net.URL)

         */

        public void getCapabilities(URL server) 

                throws WFSException {

                        try {

                                getClient(server).connect();

                        } catch (Exception e) {                        

                                throw new WFSException(e);

                        }                

        }        

        /**

         * Devuelve WFSClient a partir de su URL.

         *

         * @param url URL.

         *

         * @return WMSClient.

         * @throws IOException 

         * @throws ConnectException 

         *

         * @throws UnsupportedVersionException

         * @throws IOException

         */

        public WFSClient getClient(URL url) throws ConnectException, IOException {

                if (client == null) {

                        client = new WFSClient(url.toString());

                }

                return client;

        }

        /**

     * Creates a new instance of a WFSClient.

     * @param 

     * host

         * @throws IOException 

         * @throws ConnectException 

     */

    public void createClient(URL host) throws ConnectException, IOException {

        client = new WFSClient(host.toString());

    }

    /**

         * Establishes the connection to the WfS server. Connecting to a WFS is

         * an abstraction.<br>

         * <p>

         * Actually, it sends a GetCapabilities request to read the necessary 

         * data for building further DescribeFeatureType requests.

         * </p>

         * @throws IOException, DriverException.

         */

        public boolean connect() throws IOException, DriverException {

                return client.connect();

        }

        /**

         * Returns an array of WFSLayerNode's with the descriptors of 

         * all features (retrieved using the getCapabilities operation)

         * @return WFSLayerNode[]

         */

        public WFSLayerNode[] getLayerList(){

                if (features == null) {

                        features = new Hashtable();

                        Hashtable wfsFeatures  = client.getFeatures();

                        Iterator keys = wfsFeatures.keySet().iterator();

                        featuresList = new WFSLayerNode[wfsFeatures.size()];

                        for (int i=0 ; i<wfsFeatures.size() ; i++){

                                WFSLayerNode lyr = new WFSLayerNode();

                                WFSFeature feature = (WFSFeature)wfsFeatures.get(keys.next());

                                lyr.setName(feature.getName());

                                lyr.setTitle(feature.getTitle());

                                lyr.setAbstract(feature.getAbstract());

                                lyr.setFields(feature.getFields());

                                featuresList[i] = lyr;

                                features.put(lyr.getName(), lyr);

                        }                        

                }                

                return featuresList;

        }

        /**

         * Returns all the feature information retrieved using a 

         * describeFeatureTypeOpearion

         * @param layerName

         * Feature name

         * @return

         */

        public WFSLayerNode getLayerInfo(String layerName){

                WFSLayerNode lyr = (WFSLayerNode)features.get(layerName);

                if (lyr.getFields().size() == 0){

                        try {

                                describeFeatureType(layerName);

                                WFSFeature feature = (WFSFeature) client.getFeatures().get(layerName);

                                lyr.setFields(feature.getFields());

                        } catch (WFSException e) {

                                // The feature doesn't has fields

                                e.printStackTrace();

                        }

                }

                return lyr;

        }

        /**

     * @return The title of the service offered by the WMS server.

     */

    public String getServiceTitle() {

        return client.getServiceInformation().title;

    }

    /**

     * @return The abstract of the service offered by the WMS server.

     */

    public String getServiceAbstract() {

        return client.getServiceInformation().abstr;

    }

    /**

     * Returns a Hash table containing the values for each online resource.

     * Using as key a String with name of the WMS request and the value returned

     * by the hash is another string containing the corresponding Url  

     * @return HashTable

     */

    public Hashtable getOnlineResources() {

            Hashtable onlineResources = new Hashtable();

            ServiceInformation si = client.getServiceInformation();

            Iterator it = si.operations.keySet().iterator();

            while (it.hasNext()) {

                    String key = (String) it.next();

                    String val = (String) si.operations.get(key);

                    if (val==null && (si.online_resource!=null || si.online_resource!= ""))

                            val = si.online_resource;

                    if (val!=null) {

                            onlineResources.put(key, val);

                    }

            }

            return onlineResources;

    }

    /**

     * 

     * @return the host

     */

    public String getHost(){

        return client.getHost();

    }

    /**

     * @return the version of this client.

     */

    public String getVersion() {

        return client.getVersion();

    }

    /*

     *  (non-Javadoc)

     * @see com.iver.cit.gvsig.fmap.drivers.WFSDriver#describeFeatureType(java.lang.String)

     */

        public void describeFeatureType(String featureType) throws WFSException {

                client.describeFeatureType(null,featureType);                                

        }

}