| gvSIG desktop 1

/* 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.

 *

 */

package org.gvsig.newlayer.impl;

import java.net.URL;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import javax.swing.ImageIcon;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.newlayer.NewLayerManager;

import org.gvsig.newlayer.NewLayerProviderFactory;

import org.gvsig.newlayer.NewLayerService;

import org.gvsig.newlayer.NewLayerWizard;

import org.gvsig.newlayer.impl.preferences.DefaultNewLayerPreferencesComponent;

import org.gvsig.newlayer.preferences.NewLayerPreferencesComponent;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPoint.Extension;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.tools.service.ServiceException;

/**

 * Default {@link NewLayerManager} implementation.

 * 

 * @author gvSIG Team

 * @version $Id$

 */

public class DefaultNewLayerManager implements NewLayerManager {

    private static final Logger LOG = LoggerFactory

        .getLogger(DefaultNewLayerManager.class);

    final static private String EP_NEWLAYER_NAME = "NewLayer.manager.providers";

    final static private String EP_NEWLAYER_DESCRIPTION = "NewLayer providers";

    private Map<NewLayerProviderFactory, Boolean> providerStatus;

    /**

     * Empty constructor.

     */

    public DefaultNewLayerManager() {

        providerStatus = new HashMap<NewLayerProviderFactory, Boolean>();

    }

    public NewLayerService createNewLayerService(MapContext mapContext) {

        return new DefaultNewLayerService(this, mapContext);

    }

    public void registerProvider(NewLayerProviderFactory factory) {

        ExtensionPoint ep = getNewLayerProvidersExtensionPoint();

        ep.append(factory.getName(), factory.getDescription(), factory);

    }

    public NewLayerWizard createNewLayerWizard(NewLayerService service) {

        URL iconURL =

            getClass().getClassLoader().getResource(

                "org/gvsig/newlayer/lib/impl/images/newlayericon.png");

        ImageIcon logo = null;

        if (iconURL != null) {

            logo = new ImageIcon(iconURL);

        }

        return new DefaultNewLayerWizard(logo, service);

    }

    public NewLayerProviderFactory getNewLayerProviderFactory(

        String providerName) throws ServiceException {

        ExtensionPoint ep = getNewLayerProvidersExtensionPoint();

        try {

            return (NewLayerProviderFactory) ep.create(providerName);

        } catch (InstantiationException e) {

            throw new RuntimeException(e);

        } catch (IllegalAccessException e) {

            throw new RuntimeException(e);

        }

    }

    public void enableProvider(NewLayerProviderFactory factory, Boolean value) {

        providerStatus.put(factory, Boolean.valueOf(value));

    }

    public NewLayerPreferencesComponent createNewLayerProvidersPreferences() {

        return new DefaultNewLayerPreferencesComponent();

    }

    public List<NewLayerProviderFactory> getProviders() {

        ExtensionPoint ep = getNewLayerProvidersExtensionPoint();

        List<NewLayerProviderFactory> providers =

            new ArrayList<NewLayerProviderFactory>();

        @SuppressWarnings("unchecked")

        Iterator<Extension> it = ep.iterator();

        while (it.hasNext()) {

            Extension extension = (Extension) it.next();

            NewLayerProviderFactory factory;

            try {

                factory = (NewLayerProviderFactory) extension.create();

            } catch (InstantiationException e) {

                LOG.warn(

                    "Can't create NewLayerProviderFactory "

                        + extension.getName(), e);

                continue;

            } catch (IllegalAccessException e) {

                LOG.warn(

                    "Can't create NewLayerProviderFactory "

                        + extension.getName(), e);

                continue;

            }

            providers.add(factory);

        }

        return providers;

    }

    private ExtensionPoint getNewLayerProvidersExtensionPoint() {

        ExtensionPointManager epmgr = ToolsLocator.getExtensionPointManager();

        return

            epmgr.add(EP_NEWLAYER_NAME, EP_NEWLAYER_DESCRIPTION);

    }

    public List<NewLayerProviderFactory> getProviders(STORETYPE filter) {

        // TODO use filters

        // if (filter == STORETYPE.TABULAR){

        // if (!factory.isSpatial()){

        // providers.add(factory);

        // }

        // } else {

        // }

        return getProviders();

    }

    public boolean isProviderEnabled(NewLayerProviderFactory factory) {

        Boolean status = providerStatus.get(factory);

        return status == null ? true : status.booleanValue();

    }

}