Module it.tidalwave.util
Package it.tidalwave.util

Interface Finder.InMemorySortCriterion<U>

All Superinterfaces:
Finder.SortCriterion
All Known Implementing Classes:
Finder.InMemorySortCriterion.DefaultInMemorySortCriterion
Enclosing interface:
Finder<T>
public static interface Finder.InMemorySortCriterion<U> extends Finder.SortCriterion
An interface that should be implemented by specific Finder.SortCriterion objects which are capable to implement by themselves the sorting of objects, by post-processing an existing collection of objects. While this is often convenient, it is possible for it to be inefficient in cases in which the original source of objects is capable to perform the sort in an optimized way (e.g. an SQL database by means of ORDER BY). The facility class HierarchicFinderSupport supports FilterSortCriterion objects out of the box.

  • Method Details

    • sort

      default void sort(@Nonnull List<? extends U> results)
      Performs the sort of results.
      Parameters:
      results - the list of objects to be sorted in place

    • sort

      void sort(@Nonnull List<? extends U> results, @Nonnull Finder.SortDirection sortDirection)
      Performs the sort of results.
      Parameters:
      results - the list of objects to be sorted in place
      sortDirection - the sort direction

    • of

      @Nonnull static <U> Finder.InMemorySortCriterion<U> of(@Nonnull Comparator<? super U> comparator)
      Creates a new in-memory SortCriterion based on a Comparator.
      Type Parameters:
      U - the type of the objects to compare
      Parameters:
      comparator - the Comparator
      Returns:
      the new SortCriterion

    • of

      @Nonnull static <U> Finder.InMemorySortCriterion<U> of(@Nonnull Comparator<? super U> comparator, @Nonnull String name)
      Creates a new in-memory SortCriterion based on a Comparator.
      Type Parameters:
      U - the type of the objects to compare
      Parameters:
      comparator - the Comparator
      name - a name
      Returns:
      the new SortCriterion