Application: gvSIG desktop » gvSIG tools: HyperLink

/* 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.hyperlink.app.extension;

import java.io.File;

import java.io.IOException;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.logging.Level;

import javax.swing.JPanel;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.messages.NotificationManager;

import org.gvsig.tools.util.URLUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * This class extends JPanel and implements IExtensioBuilder. Provides the

 * methods that will be reimplemented by the descendant class. Creates a panel

 * that shows the content of a URI. The necessary code that allows to show the

 * content of the URI is provided by the descendant class. Implmenting

 * IExtenssionBuilder this class and its the descendant provides a point of

 * extension for other extensions.

 */

public abstract class AbstractHyperLinkPanel extends JPanel {

    protected static final Logger LOGGER = LoggerFactory.getLogger(AbstractHyperLinkPanel.class);

    protected LinkTarget document;

    public AbstractHyperLinkPanel(LinkTarget linkTarget) {

        super();

        document = linkTarget;

    }

    public LinkTarget getLinkTarget() {

        return document;

    }

    /**

     * Tries to make an absolute url from a relative one, and returns true if

     * the URL is valid. false otherwise

     *

     * @return

     */

    protected boolean checkAndNormalizeURI() {

        if (document == null) {

            LOGGER.warn("Hyperlink linked field does not exits");

            return false;

        } else if (document.getURL() != null) {

            try {

                if (!document.getURL().toURI().isAbsolute()) {

                    try {

                        // try as a relative path

                        File file = this.document.toFile();

                        if (file == null) {

                            LOGGER.warn("Hyperlink can't get file from '" + this.document.getURL() + "'.");

                            return false;

                        }

                        file = file.getCanonicalFile();

                        if (!file.exists()) {

                            LOGGER.warn("Hyperlink linked field, file '"+file+"' not exits");

                            return false;

                        }

                        document.setURL(URLUtils.toURL(file));

                        return true;

                    } catch (IOException e) {

                        LOGGER.warn("Hyperlink linked field does not exits");

                        return false;

                    }

                }

            } catch (URISyntaxException ex) {

                LOGGER.warn("Hyperlink linked field does not exits");

                return false;

            }

        }

        return true;

    }

}