EDIT

         * refiltering.

         */

        protected void applyFilter() {

            ItemsFilter newFilter = createFilter();

            // don't apply filtering for patterns which mean the same, for example:

             */

            @Override

            public Object[] getElements(Object inputElement) {

                return lastFilteredItems.toArray();

            }

            public int getNumberOfElements() {

            }

            /*

            return pattern;

        }

    }