/**

public List<String> findCitedKeys() throws com.sun.star.container.NoSuchElementException, WrappedTargetException {

     * Take a list of external links and copy the referred files to a given directory.

     * This method should be run off the Event Dispatch Thread. A progress bar, if given,

        XReferenceMarksSupplier supplier = (XReferenceMarksSupplier) UnoRuntime.queryInterface(

     * will be updated on the EDT.

                XReferenceMarksSupplier.class, xCurrentComponent);

     *

        XNameAccess xNamedMarks = supplier.getReferenceMarks();

     * @param files The list of file links.

        String[] names = xNamedMarks.getElementNames();

     * @param toDir The directory to copy the files to.

        ArrayList<String> keys = new ArrayList<String>();

     * @param metaData The MetaData for the database containing the external links. This is needed

        for (int i = 0; i < names.length; i++) {

     *  because the database might have its own file directory.

            Object bookmark = xNamedMarks.getByName(names[i]);

     * @param prog A JProgressBar which will be updated to show the progress of the process.

            XTextContent xTextContent = (XTextContent) UnoRuntime.queryInterface(

     *  This argument can be null if no progress bar is needed.

                    XTextContent.class, bookmark);

     * @param deleteOriginalFiles if true, the files in their original locations will be deleted

     *  after copying, for each file whose source directory is different from the destination

            String name = names[i];

     *  directory differs.

            List<String> newKeys = parseRefMarkName(name);

     * @param callback An ActionListener which should be notified when the process is finished.

            for (String key : newKeys)

     *  This parameter can be null if no callback is needed.

                if (!keys.contains(key))

     */

                    keys.add(key);

    public static void copyExternalLinksToDirectory(final List<FileListEntry> files, File toDir,

        }

                                                    MetaData metaData, final JProgressBar prog,

                                                    boolean deleteOriginalFiles,

        return keys;

                                                    final ActionListener callback) {

    }

        if (prog != null) SwingUtilities.invokeLater(new Runnable() {

            public void run() {

                prog.setMaximum(files.size());

                prog.setValue(0);

                prog.setIndeterminate(false);

            }

        });

        Set<String> fileNames = new HashSet<String>();

        int i=0;

        for (Iterator<FileListEntry> iterator = files.iterator(); iterator.hasNext();) {

            FileListEntry entry = iterator.next();

            File file = new File(entry.getLink());

            // We try to check the extension for the file:

            String name = file.getName();

            int pos = name.lastIndexOf('.');

            String extension = ((pos >= 0) && (pos < name.length() - 1)) ? name.substring(pos + 1)

                .trim().toLowerCase() : null;

            // Find the default directory for this field type, if any:

            String[] dir = metaData.getFileDirectory(extension);

            // Include the standard "file" directory:

            String[] fileDir = metaData.getFileDirectory(GUIGlobals.FILE_FIELD);

            // Include the directory of the bib file:

            ArrayList<String> al = new ArrayList<String>();

            for (int i2 = 0; i2 < dir.length; i2++)

                if (!al.contains(dir[i2])) al.add(dir[i2]);

            for (int i2 = 0; i2 < fileDir.length; i2++)

                if (!al.contains(fileDir[i2])) al.add(fileDir[i2]);

            String[] dirs = al.toArray(new String[al.size()]);

            File tmp = Util.expandFilename(entry.getLink(), dirs);

            if (tmp != null)

                file = tmp;

            // Check if we have arrived at an existing file:

            if (file.exists()) {

                if (fileNames.contains(name)) {

                    // Oops, a file of that name already exists....

                }

                else {

                    fileNames.add(name);

                    File destination = new File(toDir, name);

                    // Check if the source and destination locations differ:

                    if (!destination.equals(file)) {

                        try {

                            // Copy the file:

                            Util.copyFile(file, destination, false);

                            // Delete the original file if requested:

                            if (deleteOriginalFiles)

                                file.delete();

                        } catch (IOException ex) {

                            ex.printStackTrace();

                        }

                    }

                    else {

                        // Destination and source is the same. Do nothing.

                    }

                    // Update progress bar:

                    i++;

                    final int j = i;

                    if (prog != null) SwingUtilities.invokeLater(new Runnable() {

                        public void run() {

                            prog.setValue(j);

                        }

                    });

                }

            }

            else {

                // The link could not be resolved to an existing file.

            }

        }

        if (callback != null) {

            callback.actionPerformed(null);

        }

    }