Application: gvSIG desktop » gvSIG data provider for WFS

/* 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.fmap.dal.serverexplorer.wfs;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.net.ConnectException;

import java.util.ArrayList;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.List;

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.exception.DataException;

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

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

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

import org.gvsig.fmap.dal.store.wfs.WFSFeatureFiller;

import org.gvsig.fmap.dal.store.wfs.WFSStoreParameters;

import org.gvsig.fmap.dal.store.wfs.WFSStoreProvider;

import org.gvsig.remoteclient.wfs.WFSClient;

import org.gvsig.remoteclient.wfs.WFSFeature;

import org.gvsig.remoteclient.wfs.WFSStatus;

import org.gvsig.remoteclient.wfs.exceptions.WFSException;

import org.gvsig.tools.dispose.impl.AbstractDisposable;

import org.gvsig.tools.exception.BaseException;

import org.gvsig.xmlschema.lib.api.exceptions.SchemaCreationException;

/**

 * @author <a href="mailto:jpiera@gvsig.org">Jorge Piera</a>

 */

public class WFSServerExplorer extends AbstractDisposable implements

DataServerExplorerProvider {

    public static final String NAME = "WFSServerExplorer";

    private WFSServerExplorerParameters parameters = null;

    private DataManager dataManager = DALLocator.getDataManager();

    private String url = null;

    //WFS Parameters

    private WFSStatus status = null;

    private WFSClient wfsClient = null;

    /**

     * @param parameters

     */

    public WFSServerExplorer(WFSServerExplorerParameters parameters, DataServerExplorerProviderServices services) throws InitializeException{

        super();

        this.parameters = parameters;

        this.url = parameters.getUrl();

        if (wfsClient == null){

            try {

                wfsClient = new WFSClient(url);

                if (status == null){

                    status = new WFSStatus(null);                                        

                }

                wfsClient.getCapabilities(status, false, null);

            } catch (ConnectException e) {

                throw new InitializeException("Not possible to connect with " + url, e);

            } catch (IOException e) {

                throw new InitializeException("Not possible to connect with " + url, e);

            } catch (WFSException e) {

                throw new InitializeException("Not possible to connect with " + url, e);

            }

        }

    }

    /**

     * Returns all the feature information retrieved using a

     * describeFeatureTypeOpearion

     * @param layerName

     * Feature name

     * @return

     * @throws WFSException 

     */

    public WFSFeature getFeatureInfo(String nameSpace, String layerName) throws WFSException{

        status = new WFSStatus(layerName, nameSpace);

        WFSFeature feature = (WFSFeature) wfsClient.getFeature(nameSpace, layerName); 

        if (!feature.isCompleted()){

            File describeFeatureTypeFile = wfsClient.describeFeatureType(status, false, null);

            WFSFeatureFiller featureFiller = new WFSFeatureFiller(feature);

            try {

                featureFiller.fill(describeFeatureTypeFile);

            } catch (SchemaCreationException e) {

                throw new WFSException(e);

            } catch (FileNotFoundException e) {

                throw new WFSException(e);

            }

        }

        return         feature;

    }

    /**

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

     * all features (retrieved using the getCapabilities operation)

     * @return WFSLayerNode[]

     */

    public Hashtable getFeatures(){

        return wfsClient.getFeatures();

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.dal.DataServerExplorer#add(org.gvsig.fmap.dal.NewDataStoreParameters, boolean)

     */

    public boolean add(String providerName, NewDataStoreParameters parameters, boolean overwrite)

    throws DataException {

        // TODO Auto-generated method stub

        return false;

    }

    /* (non-Javadoc)

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

     */

    public boolean canAdd() {

        // TODO Auto-generated method stub

        return false;

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.dal.DataServerExplorer#canAdd(java.lang.String)

     */

    public boolean canAdd(String storeName) throws DataException {

        // TODO Auto-generated method stub

        return false;

    }

    @Override

    protected void doDispose() throws BaseException {

        // Nothing to do

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.dal.DataServerExplorer#getAddParameters(java.lang.String)

     */

    public NewDataStoreParameters getAddParameters(String storeName)

    throws DataException {

        // TODO Auto-generated method stub

        return null;

    }

    /* (non-Javadoc)

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

     */

    public String getProviderName() {

        return NAME;

    }

    /* (non-Javadoc)

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

     */

    public DataServerExplorerParameters getParameters() {

        return parameters;

    }

    /* (non-Javadoc)

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

     */

    public List list() throws DataException {

        ArrayList list = new ArrayList();

        Hashtable features = wfsClient.getFeatures();

        Iterator it = features.keySet().iterator();

        DataStoreParameters dsp = null;

        while (it.hasNext()){

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

            WFSFeature feature = (WFSFeature)features.get(key);

            list.add(getParametersFor(feature));

        }

        return list;

    }

    public DataStoreParameters getParametersFor(WFSFeature feature)

    throws DataException {

        WFSStoreParameters params = (WFSStoreParameters)dataManager

        .createStoreParameters(WFSStoreProvider.NAME);

        params.setUrl(url);

        params.setFeatureType(feature.getNamespace().getPrefix(), 

            feature.getNamespace().getLocation(),

            feature.getName());

        return params;

    }

    /* (non-Javadoc)

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

     */

    public List list(int mode) throws DataException {

        return list();

    }

    /* (non-Javadoc)

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

     */

    public void remove(DataStoreParameters parameters) throws DataException {

        // TODO Auto-generated method stub

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.dal.spi.DataServerExplorerProvider#getServerExplorerProviderServices()

     */

    public DataServerExplorerProviderServices getServerExplorerProviderServices() {

        // TODO Auto-generated method stub

        return null;

    }

    /* (non-Javadoc)

     * @see org.gvsig.fmap.dal.spi.DataServerExplorerProvider#initialize(org.gvsig.fmap.dal.spi.DataServerExplorerProviderServices)

     */

    public void initialize(

        DataServerExplorerProviderServices dataServerExplorerProviderServices) {

        // TODO Auto-generated method stub

    }

    /**

     * @return

     */

    public String getTitle() {

        String title = wfsClient.getServiceInformation().title;

        if (title == null){

            return "None";

        }

        return title;                

    }

    /**

     * @return

     */

    public String getAbstract() {

        String _abstract = wfsClient.getServiceInformation().abstr;

        if (_abstract == null){

            return "None";

        }

        return _abstract;

    }

    /**

     * @return

     */

    public String getServerType() {

        String serverVersion = wfsClient.getVersion();

        if (serverVersion == null) {

            return "WFS";

        }

        return "WFS "+ serverVersion;

    }

    /**

     * @return

     */

    public String getUrl() {

        return wfsClient.getHost();

    }

    /**

     * @return

     */

    public int getMaxFeatures() {

        return status.getMaxFeatures();

    }

    /**

     * @return

     */

    public int getTimeOut() {

        return status.getTimeout();

    }

    /**

     * @param userName

     */

    public void setUserName(String userName) {

        status.setUserName(userName);                

    }

    /**

     * @param buffer

     */

    public void setMaxFeatures(int buffer) {

        status.setMaxFeatures(buffer);

    }

    /**

     * @param timeout

     */

    public void setTimeOut(int timeout) {

        status.setTimeout(timeout);                

    }

    /**

     * @return

     */

    public String getVersion() {

        return wfsClient.getVersion();

    }

    public List getDataStoreProviderNames() {

        List x = new ArrayList();

        x.add(WFSStoreProvider.NAME);

        return x;

    }        

}