Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

*

* Copyright (C) 2007-2008 Infrastructures and Transports Department

* of the Valencian Government (CIT)

*

* 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., 51 Franklin Street, Fifth Floor, Boston,

* MA  02110-1301, USA.

*

*/

/*

* AUTHORS (In addition to CIT):

* 2009 IVER T.I   {{Task}}

*/

package org.gvsig.raster.wcs.io;

import java.awt.geom.Point2D;

import java.io.IOException;

import java.io.InputStream;

import java.net.InetAddress;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

import java.net.UnknownHostException;

import java.util.Hashtable;

import java.util.List;

import org.gvsig.compat.net.ICancellable;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.DataServerExplorerParameters;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.NewDataStoreParameters;

import org.gvsig.fmap.dal.coverage.exception.RemoteServiceException;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.InitializeException;

import org.gvsig.fmap.dal.exception.ProviderNotRegisteredException;

import org.gvsig.fmap.dal.spi.DataServerExplorerProvider;

import org.gvsig.fmap.dal.spi.DataServerExplorerProviderServices;

import org.gvsig.i18n.Messages;

/**

 * Explorer for a WCS server

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class WCSServerExplorer implements DataServerExplorerProvider {

        public static final String          NAME                     = "WCSRemoteServerExplorer";

        private WCSConnector                connector                = null;

        private WCSServerExplorerParameters parameters               = null;

        public WCSServerExplorer(

                        WCSServerExplorerParameters parameters,

                        DataServerExplorerProviderServices services)

                        throws InitializeException {

                this.parameters = parameters;

        }

        /**

         * Gets the provider's name

         * @return

         */

        public String getDataStoreProviderName() {

                return WCSProvider.NAME;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.store.remote.RemoteServerExplorerProvider#getDescription()

         */

        public String getDescription() {

                return WCSProvider.DESCRIPTION;

        }

        public DataStoreParameters getStoreParameters() {

                DataManager manager = DALLocator.getDataManager();

                WCSDataParametersImpl params = null;

                try {

                        params = (WCSDataParametersImpl) manager.createStoreParameters(this.getDataStoreProviderName());

                        /*if(WCSProvider.TILED) {

                                TileDataParameters tileParams = (TileDataParameters) manager.createStoreParameters("Tile Store");

                                tileParams.setDataParameters(params);

                                return tileParams;

                        } */

                } catch (InitializeException e) {

                        e.printStackTrace();

                } catch (ProviderNotRegisteredException e) {

                        e.printStackTrace();

                }

                params.setURI(parameters.getHost());

                return params;

        }

        public boolean add(String provider, NewDataStoreParameters parameters,

                        boolean overwrite) throws DataException {

                return false;

        }

        public boolean canAdd() {

                return false;

        }

        public boolean canAdd(String storeName) throws DataException {

                return false;

        }

        public NewDataStoreParameters getAddParameters(String storeName)

                        throws DataException {

                return null;

        }

        public List getDataStoreProviderNames() {

                return null;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.DataServerExplorer#getParameters()

         */

        public DataServerExplorerParameters getParameters() {

                return parameters;

        }

        public List list() throws DataException {

                return null;

        }

        public List list(int mode) throws DataException {

                return null;

        }

        public void remove(DataStoreParameters parameters) throws DataException {

        }

        public void dispose() {

        }

        public String getProviderName() {

                return null;

        }

        /**

         * Gets the online resources

         * @return

         */

        public Hashtable getOnlineResources() {

                /*if(connector != null) {

                        return connector.getOnlineResources();

                }*/

                return null;

        }

        //**********************************************

        //Connector

        //**********************************************

        /**

         * Connects to the server and throws a getCapabilities. This loads 

         * the basic information to make requests.

         * @throws RemoteServiceException 

         */

        public void connect(ICancellable cancellable) throws RemoteServiceException {

                URL url = null;

                boolean override = false;

                try {

                        url = new URL(parameters.getHost());

                } catch (Exception e) {

                        throw new RemoteServiceException(Messages.getText("malformed_url"), e);

                }

        try {

                connector = WCSProvider.getConnectorFromURL(url);

                if (!connector.connect(override, cancellable))

                        throw new RemoteServiceException(Messages.getText("error_connecting"));

        } catch (IOException e) {

                        throw new RemoteServiceException(Messages.getText("error_connecting"), e);

                }

        }

        /**

         * Checks if the network and host are reachable

         * @param timeout for the host

         * @return true if both are reachable and false if they are not

         */

        public boolean isHostReachable(int timeout) {

                URL url = null;

                try {

                        url = new URL(parameters.getHost());

                        URLConnection con = url.openConnection();

                        if(con == null)

                                return false;

                        con.connect();

                        InputStream stream = con.getInputStream();

                        if(stream == null)

                                return false;

                } catch (MalformedURLException e) {

                        return false;

                } catch (IOException e) {

                        return false;

                }

                return true;

        }

        /**

         * Checks if the network and host are reachable

         * @return true if both are reachable and false if they are not

         */

        public boolean isHostReachable() {

                int timeout = 10000;

                return isHostReachable(timeout);

        }

        /**

         * Returns true if this provider is connected to the server

         * @return

         */

        public boolean isConnected() {

                if(connector != null)

                        return true;

                return false;

        }

        /**

         * Gets the description of this service

         * @return

         */

        public String getAbstract() {

                if(connector != null)

                        return connector.getDescription();

                return null;

        }

        /**

         * Gets the server title

         * @return

         */

        public String getServerType() {

                if (getVersion() == null) 

                        return "WCS";

        return "WCS "+ getVersion();

        }

        /**

         * Gets the protocol supported by the server

         * @return

         */

        public String getVersion() {

                if(connector != null) {

                        return (connector.getVersion() == null) ? "" : connector.getVersion();

                }

                return null;

        }

        /**

         * Gets the host URI

         * @return

         */

        public String getHost() {

                return parameters.getHost();

        }

        /**

         * Gets the title

         * @return

         */

        public String getTitle() {

                return null;

        }

        public DataServerExplorerProviderServices getServerExplorerProviderServices() {

                // TODO Auto-generated method stub

                return null;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.fmap.dal.coverage.explorer.WCSServerExplorer#getMaxResolution(java.lang.String)

         */

        public Point2D getMaxResolution(String layerName) {

                return connector.getMaxResolution(layerName);

        }

        /**

         * Gets the coverage list

         * @return

         */

        public WCSLayerNode[] getCoverageList() {

                return connector.getLayerList();

        }

        /**

         * Gets a layer searching by its name 

         * @return

         */

        public WCSLayerNode getCoverageByName(String name) {

                WCSLayerNode[] list = getCoverageList();

                for (int i = 0; i < list.length; i++) {

                        if(list[i].getName().compareTo(name) == 0)

                                return list[i];

                }

                return null;

        }

}