| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2007 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.

 */

package com.iver.cit.gvsig.panelGroup.loaders;

import java.util.ArrayList;

import java.util.Iterator;

import org.gvsig.gui.beans.panelGroup.loaders.IPanelGroupLoader;

import org.gvsig.gui.beans.panelGroup.panels.AbstractPanel;

import com.iver.utiles.extensionPoints.ExtensionPoint;

import com.iver.utiles.extensionPoints.ExtensionPoints;

import com.iver.utiles.extensionPoints.ExtensionPointsSingleton;

/**

 * <p>Panel loader version that loads {@link AbstractPanel AbstractPanel} classes registered

 *  as a extension point.</p>

 *

 * @see IPanelGroupLoader

 *

 * @version 15/10/2007

 * @author Pablo Piqueras Bartolom? (pablo.piqueras@iver.es)

 */

public class PanelGroupLoaderFromExtensionPoint implements IPanelGroupLoader {

        /**

         * Extension point id

         */

        private String id;

        /**

         * <p>Initializes this loader.</p>

         *

         * @param id extension point identifier

         */

        public PanelGroupLoaderFromExtensionPoint(String id) {

                this.id = id;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.gui.beans.panelGroup.loaders.IPanelGroupLoader#loadPanels()

         */

        public AbstractPanel[] loadPanels() throws Exception {

                if (id == null)

                        return null;

                ExtensionPoints extensionPoints = ExtensionPointsSingleton.getInstance();

                ExtensionPoint extensionPoint = (ExtensionPoint) extensionPoints.get(id);

                if (extensionPoint == null)

                        return null;

                Iterator iterator = extensionPoint.keySet().iterator();

                ArrayList<AbstractPanel> panels = new ArrayList<AbstractPanel>();

                Exception lastException = null;

                String key;

                Class class_type;

                while (iterator.hasNext()) {

                        try {

                                key = (String) iterator.next();

                                class_type = ((Class) extensionPoint.get(key));

                                if ((class_type != null) && (AbstractPanel.class.isAssignableFrom(class_type))) {

                                        panels.add((AbstractPanel) class_type.getConstructor().newInstance());

                                }

                        } catch (Exception e) {

                                lastException = e;

                        }

                }

                return panels.toArray(new AbstractPanel[panels.size()]);

        }

}