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 javax.swing.JPanel;

import org.gvsig.andami.PluginServices;

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 URI document;

    public AbstractHyperLinkPanel(URI doc) {

        super();

        document = doc;

    }

    public URI getURI() {

        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) {

            PluginServices.getLogger().warn(PluginServices.getText(this,

                "Hyperlink_linked_field_doesnot_exist"));

            return false;

        } else

            if (!document.isAbsolute()) {

                try {

                    // try as a relative path

                    File file =

                        new File(document.toString()).getCanonicalFile();

                    if (!file.exists()) {

                        PluginServices.getLogger()

                            .warn(PluginServices.getText(this,

                                "Hyperlink_linked_field_doesnot_exist"));

                        return false;

                    }

                    document = file.toURI();

                } catch (IOException e) {

                    PluginServices.getLogger()

                        .warn(PluginServices.getText(this,

                            "Hyperlink_linked_field_doesnot_exist"));

                    return false;

                }

            }

        return true;

    }

}