| gvSIG desktop 1

package org.gvsig.hyperlink;

import java.io.File;

import java.io.IOException;

import java.net.URI;

import javax.swing.JPanel;

import com.iver.andami.PluginServices;

/**

 * 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 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;

        }

}