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.wms.io;

import java.awt.geom.Rectangle2D;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

import java.net.MalformedURLException;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLConnection;

import java.util.ArrayList;

import java.util.Hashtable;

import java.util.List;

import java.util.Vector;

import java.util.logging.Level;

import org.apache.commons.lang3.StringUtils;

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.DataStore;

import org.gvsig.fmap.dal.DataStoreParameters;

import org.gvsig.fmap.dal.NewDataStoreParameters;

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

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

import org.gvsig.fmap.dal.coverage.store.RasterDataServerExplorer;

import org.gvsig.fmap.dal.coverage.store.RasterDataStore;

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

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

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

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

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

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

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

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

import org.gvsig.i18n.Messages;

import org.gvsig.remoteclient.utils.Utilities;

import org.gvsig.tools.task.Cancellable;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Explorer for a WMS server

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

 */

public class WMSServerExplorer extends AbstractDataServerExplorer implements RasterDataServerExplorer, DataServerExplorerProvider {

        public static final String          NAME                     = WMSProvider.NAME;

        private WMSConnector                connector                = null;

//        private WMSServerExplorerParameters parameters               = null;

        private Logger                      log                      = LoggerFactory.getLogger(WMSServerExplorer.class);

        public WMSServerExplorer(

                        WMSServerExplorerParameters parameters,

                        DataServerExplorerProviderServices services)

                        throws InitializeException {

                super(parameters, services);

//                this.parameters = parameters;

        }

        /**

         * Gets the provider's name

         * @return

         */

        public String getDataStoreProviderName() {

                return WMSProvider.NAME;

        }

        public String getDescription() {

                return WMSProvider.DESCRIPTION;

        }

        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<String> getDataStoreProviderNames() {

                return null;

        }

        public WMSServerExplorerParameters getParameters() {

                return (WMSServerExplorerParameters) super.getParameters();

        }

        public List<DataStoreParameters> list() throws DataException {

                return null;

        }

        public List<DataStoreParameters> list(int mode) throws DataException {

                return null;

        }

        public void remove(DataStoreParameters parameters) throws DataException {

        }

        public String getProviderName() {

                return null;

        }

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

        //Connector

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

        @Override

        public DataStoreParameters get(String layerName) {

            WMSDataParameters params = (WMSDataParameters) this.getStoredParameters();

            params.setLayerQuery(layerName);

            return params;

        }

        public DataStoreParameters getStoredParameters() {

                DataManager manager = DALLocator.getDataManager();

                WMSDataParameters params = null;

                try {

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

                        params.setURI(new URI(getParameters().getHost()));

                        /*if(WMSProvider.TILED) {

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

                                tileParams.setDataParameters(params);

                                return tileParams;

                        } */

                } catch (InitializeException e) {

                        log.debug("Error initializating parameters", e);

                } catch (ProviderNotRegisteredException e) {

                        log.debug("Error getting parameters", e);

                } catch (URISyntaxException e) {

            log.debug("Can't create URI from "+getParameters().getHost(), e);

        }

                return params;

        }

        @Override

        public void open() throws OpenException {

            try {

                this.connect(null);

            } catch (ConnectException ex) {

                throw new OpenException(this.getHost(), ex);

            }

        }

        public void connect(ICancellable cancellable) throws ConnectException {

                connect(cancellable, false);

        }

        /**

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

         * the basic information to make requests.

         * @throws RemoteServiceException

         */

        public void connect(ICancellable cancellable, boolean updateCache) throws ConnectException {

                URL url = null;

                try {

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

                } catch (Exception e) {

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

                }

        try {

                connector = WMSProvider.getConnectorFromURL(url, updateCache);

                if (!connector.connect(this.getParameters(), updateCache, cancellable))

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

        } catch (IOException e) {

                        throw new ConnectException(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(getParameters().getHost());

                        File file = Utilities.downloadFile(url, "checkhost.dat", null);

                } catch (Exception 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.getAbstract();

                return null;

        }

        /**

         * Gets the list of raster formats supported by the server

         * @return

         */

        @SuppressWarnings("unchecked")

        public String[] getFormats() {

                if(connector != null) {

                        Vector f = connector.getFormats();

                        ArrayList formatos = new ArrayList();

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

                                formatos.add(f.elementAt(i));

                        }

                        return (String[]) formatos.toArray(new String[0]);

                }

                return null;

        }

        /**

         * Gets the list of raster information formats supported by the server

         * @return

         */

        @SuppressWarnings("unchecked")

        public String[] getInfoFormats() {

                if(connector != null) {

                        Vector f = connector.getInfoFormats();

                        ArrayList formatos = new ArrayList();

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

                                formatos.add(f.elementAt(i));

                        }

                        return (String[]) formatos.toArray(new String[0]);

                }

                return null;

        }

        /**

         * Gets a tree of nodes which represents the server information

         * @return

         */

        public WMSLayerNode getLayerTree() {

                if(connector != null) {

                        return connector.getLayersTree();

                }

                return null;

        }

        /**

         * Gets the server title

         * @return

         */

        public String getServerType() {

                if (getVersion() == null)

                        return "WMS";

        return "WMS "+ getVersion();

        }

        /**

         * Gets the online resources

         * @return

         */

        public Hashtable getOnlineResources() {

                if(connector != null) {

                        return connector.getOnlineResources();

                }

                return null;

        }

        /**

         * Gets the protocol supported by the server

         * @return

         */

        public String getVersion() {

                if(connector != null) {

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

                }

                return null;

        }

    public Rectangle2D getLayersExtent(String[] layerName, String srs) {

            return connector.getLayersExtent(layerName, srs);

    }

    /**

         * Gets a layer using its name

         * @param layerName

         * @return

         */

    public WMSLayerNode getLayer(String layerName) {

            return connector.getLayer(layerName);

    }

    /**

         * Gets the host URI

         * @return

         */

        public String getHost() {

                return getParameters().getHost();

        }

        public Rectangle2D getBoundingBox(String[] layerNames, String srs) {

                return connector.getLayersExtent(layerNames, srs);

    }

        public boolean isQueryable() {

            return connector.isQueryable();

    }

        /**

         * Gets the title

         * @return

         */

        public String getTitle() {

                return null;

        }

    /**

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

     */

    public String getServiceTitle() {

                return connector.getServiceTitle();

    }

    public DataServerExplorerProviderServices getServerExplorerProviderServices() {

            return null;

    }

    @Override

    public DataStore open(DataStoreParameters par) throws DataException {

        String layerName = "unknown";

        try {

            layerName = (String) par.getDynValue(WMSDataParametersImpl.FIELD_LAYERQUERY);

            DataManager datamanager = DALLocator.getDataManager();

            RasterDataStore store = (RasterDataStore) datamanager.openStore(NAME, par);

            store.setExplorer(this);

            return store;

        } catch (Exception ex) {

            throw new OpenException(layerName,ex);

        }

    }

    @Override

    public Object getProperty(String name) {

        if( StringUtils.equalsIgnoreCase("OnlineResources", name) ) {

            return this.getOnlineResources();

        }

        return super.getProperty(name);

    }

}