Examples with ReverseComparator com.fsck.k9.fragment.MessageListFragmentComparators.ReverseComparator used on opensource projects

Example 1 with ReverseComparator

use of com.fsck.k9.fragment.MessageListFragmentComparators.ReverseComparator in project k-9 by k9mail.

the class MessageListFragment method getComparator.

/**
     * @return The comparator to use to display messages in an ordered
     *         fashion. Never {@code null}.
     */
private Comparator<Cursor> getComparator() {
    final List<Comparator<Cursor>> chain = new ArrayList<>(3);
    // Add the specified comparator
    final Comparator<Cursor> comparator = SORT_COMPARATORS.get(sortType);
    if (sortAscending) {
        chain.add(comparator);
    } else {
        chain.add(new ReverseComparator<>(comparator));
    }
    // Add the date comparator if not already specified
    if (sortType != SortType.SORT_DATE && sortType != SortType.SORT_ARRIVAL) {
        final Comparator<Cursor> dateComparator = SORT_COMPARATORS.get(SortType.SORT_DATE);
        if (sortDateAscending) {
            chain.add(dateComparator);
        } else {
            chain.add(new ReverseComparator<>(dateComparator));
        }
    }
    // Add the id comparator
    chain.add(new ReverseIdComparator());
    // Build the comparator chain
    return new ComparatorChain<>(chain);
}