Java 类com.vaadin.server.SerializableComparator 实例源码

public TableSelectionModel() {
    registerRpc(new ShiftSelectRpc() {

        @Override
        public void selectRange(int start, int length) {
            if (length == 0) {
                return;
            }

            BinaryOperator<SerializableComparator<T>> operator = (comparator1, comparator2) -> {
                /*
                 * thenComparing is defined to return a serializable
                 * comparator as long as both original comparators are also
                 * serializable
                 */
                return comparator1.thenComparing(comparator2)::compare;
            };
            Comparator<T> inMemorySorting = getParent().getSortOrder().stream()
                    .map(order -> order.getSorted().getComparator(order.getDirection()))
                    .reduce((x, y) -> 0, operator);

            List<QuerySortOrder> sortProperties = new ArrayList<>();
            getParent().getSortOrder().stream().map(order -> order.getSorted().getSortOrder(order.getDirection()))
                    .forEach(s -> s.forEach(sortProperties::add));
            getParent().getDataProvider().fetch(new Query<>(start, length, sortProperties, inMemorySorting, null));
        }
    });
}