protected FilterComboBoxModel() 
{
            super();
            filters = getFileChooser().getChoosableFileFilters();
}

 public Object getElementAt(int index) 
{
            if(index  > getSize() - 1) {
                // This shouldn't happen. Try to recover gracefully.
                return getFileChooser().getFileFilter();
            }
            if(filters != null) {
                return filters[index];
            } else {
                return null;
            }
}

 public Object getSelectedItem() 
{
            // Ensure that the current filter is in the list.
            // NOTE: we shouldnt' have to do this, since JFileChooser adds
            // the filter to the choosable filters list when the filter
            // is set. Lets be paranoid just in case someone overrides
            // setFileFilter in JFileChooser.
            FileFilter currentFilter = getFileChooser().getFileFilter();
            boolean found = false;
            if(currentFilter != null) {
                for (FileFilter filter : filters) {
                    if (filter == currentFilter) {
                        found = true;
                    }
                }
                if(found == false) {
                    getFileChooser().addChoosableFileFilter(currentFilter);
                }
            }
            return getFileChooser().getFileFilter();
}

 public int getSize() 
{
            if(filters != null) {
                return filters.length;
            } else {
                return 0;
            }
}

 public  void propertyChange(PropertyChangeEvent e) 
{
            String prop = e.getPropertyName();
            if(prop == JFileChooser.CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY) {
                filters = (FileFilter[]) e.getNewValue();
                fireContentsChanged(this, -1, -1);
            } else if (prop == JFileChooser.FILE_FILTER_CHANGED_PROPERTY) {
                fireContentsChanged(this, -1, -1);
            }
}

 public  void setSelectedItem(Object filter) 
{
            if(filter != null) {
                getFileChooser().setFileFilter((FileFilter) filter);
                fireContentsChanged(this, -1, -1);
            }
}