* @return FilterCapabilities for this Filter
*/
protected FilterCapabilities createFilterCapabilities() {
FilterCapabilities capabilities = new FilterCapabilities();
capabilities.addAll(FilterCapabilities.LOGICAL_OPENGIS);
capabilities.addAll(FilterCapabilities.SIMPLE_COMPARISONS_OPENGIS);
capabilities.addType(PropertyIsNull.class);
capabilities.addType(PropertyIsBetween.class);
capabilities.addType(Id.class);
capabilities.addType(IncludeFilter.class);