Application: gvSIG desktop

/* 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.io.Serializable;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.Map;

import org.apache.log4j.Logger;

import org.gvsig.gui.beans.panelGroup.exceptions.ListCouldntLoadPanelException;

import org.gvsig.gui.beans.panelGroup.exceptions.PanelBaseException;

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

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

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

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

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

import com.iver.andami.PluginServices;

/**

 * <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, Serializable {

        private static final long serialVersionUID = 6810333457209196344L;

        /**

         * 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(java.util.ArrayList)

         */

        public void loadPanels(ArrayList<IPanel> panels) throws ListCouldntLoadPanelException {

                if (id == null) {

                        return;

                }

                ExtensionPointManager ePManager = ToolsLocator

                                .getExtensionPointManager();

                ListCouldntLoadPanelException lCLPException = null;

                Iterator<Extension> iterator = null;

                try {

                        if (!ePManager.has(id)) {

                                return;

                        }

                        iterator = ePManager.get(id).iterator();

                } catch (Exception e) {

                        Logger.getLogger(getClass().getName()).debug(PluginServices.getText(this, "panel_loading_exception"), e);

                        if ( lCLPException == null ) {

                                lCLPException = new ListCouldntLoadPanelFromExtensionPointException();

                        }

                        lCLPException.add(e);

                }

                AbstractPanel panel = null;

                while (iterator.hasNext()) {

                        try {

                                panel = (AbstractPanel) ((iterator.next()).create());

                                panels.add(panel);

                        } catch (Exception e) {

                                Logger.getLogger(getClass().getName()).debug(PluginServices.getText(this, "panel_loading_exception"), e);

                                if ( lCLPException == null ) {

                                        lCLPException = new ListCouldntLoadPanelFromExtensionPointException();

                                }

                                PanelBaseException bew = null;

                                if (panel == null) {

                                        bew = new PanelBaseException(e, "");

                                } else {

                                        bew = new PanelBaseException(e, panel.getLabel());

                                }

                                lCLPException.add(bew);

                        }

                }

                if ( lCLPException != null ) {

                        throw lCLPException;

                }

        }

        /**

         * <p>

         * Exception produced when fails the load of a panel by a loader of type

         * <code>PanelGroupLoaderFromExtensionPoint</code>.

         * </p>

         *

         * @version 27/11/2007

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

         */

        public class ListCouldntLoadPanelFromExtensionPointException extends ListCouldntLoadPanelException {

                private static final long serialVersionUID = -1513294728326593385L;

                private static final String formatString = "Couldn't load some panels from an extension point of classes:";

                private static final String messageKey = "couldnt_load_panels_from_extension_point_exception";

                /**

                 * <p>

                 * Creates an initializes a new instance of

                 * <code>ListCouldntLoadPanelFromExtensionPointException</code>.

                 * </p>

                 */

                public ListCouldntLoadPanelFromExtensionPointException() {

                        super(formatString, messageKey, serialVersionUID);

                }

                /*

                 * (non-Javadoc)

                 *

                 * @see org.gvsig.tools.exceptions.BaseException#values()

                 */

                protected Map<String, String> values() {

                        return null;

                }

        }

}