Package org.nlpub.watset.util

Class Maximizer

java.lang.Object
org.nlpub.watset.util.Maximizer
public final class Maximizer extends Object
Utilities for searching arguments of the maxima of the function.

  • Method Details

    • alwaysTrue

      public static <T> Predicate<T> alwaysTrue()
      A predicate that is always true.
      Type Parameters:
      T - the type
      Returns:
      the absolute truth

    • alwaysFalse

      public static <T> Predicate<T> alwaysFalse()
      A predicate that is always false.
      Type Parameters:
      T - the type
      Returns:
      the absolute non-truth

    • argmax

      public static <V, S extends Comparable<S>> Optional<V> argmax(Iterable<V> iterable, Predicate<V> checker, Function<V,S> scorer)
      Find the first argument of the maximum (argmax) of the function.
      Type Parameters:
      V - the argument type
      S - the score type
      Parameters:
      iterable - the finite iterator
      checker - the predicate that evaluates the suitability of the argument
      scorer - the scoring function
      Returns:
      a non-empty optional that contains the first found argmax, otherwise the empty one

    • argmax

      public static <V, S extends Comparable<S>> Optional<V> argmax(Iterable<V> iterable, Function<V,S> scorer)
      Find the first argument of the maximum (argmax) of the function.
      Type Parameters:
      V - the argument type
      S - the score type
      Parameters:
      iterable - the finite iterator
      scorer - the scoring function
      Returns:
      a non-empty optional that contains the first found argmax, otherwise the empty one
      See Also:

    • argrandmax

      public static <V, S extends Comparable<S>> Optional<V> argrandmax(Iterable<V> iterable, Function<V,S> scorer, Random random)
      Find the arguments of the maxima (argmax) of the function and randomly choose any of them.
      Type Parameters:
      V - the argument type
      S - the score type
      Parameters:
      iterable - the finite iterator
      scorer - the scoring function
      random - the random number generator
      Returns:
      a non-empty optional that contains the randomly chosen argmax, otherwise the empty one