Package org.wildfly.clustering.function

Interface UnaryOperator<T>

Type Parameters:
T - the operating type
All Superinterfaces:
Function<T,T>, Function<T,T>, UnaryOperator<T>
public interface UnaryOperator<T> extends UnaryOperator<T>, Function<T,T>
An enhanced unary operator.
Author:
Paul Ferraro

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final UnaryOperator<?>
    IDENTITY
    An identity operator that always returns its parameter
    static final UnaryOperator<?>
    NULL
    An operator that always returns null

  • Method Summary

    Modifier and Type
    Method
    Description
    default UnaryOperator<T>
    andThen(UnaryOperator<T> operator)
    Returns an operator that applies the specified operator to the result of this operator.
    static <T> UnaryOperator<T>
    apply(Function<? super T,T> function)
    Returns an operator view of the specified function.
    default UnaryOperator<T>
    compose(UnaryOperator<T> operator)
    Returns an operator that applies this operator to the result of the specified operator.
    static <T> UnaryOperator<T>
    empty()
    Returns an operator that always returns null, ignoring its parameter.
    static <K, V> UnaryOperator<Map.Entry<K,V>>
    entry(UnaryOperator<K> keyFunction, UnaryOperator<V> valueFunction)
    Returns a Map.Entry function from the specified key and value functions.
    default UnaryOperator<T>
    handle(BiFunction<T,RuntimeException,T> handler)
    Returns a new operator that delegates to this operator using the specified exception handler.
    static <T> UnaryOperator<T>
    identity()
    Returns an operator that returns its value.
    static <T> UnaryOperator<T>
    of(Consumer<T> consumer, Supplier<T> supplier)
    Returns an operator that accepts its parameter via the specified consumer and returns the value returned by the specified supplier.
    static <T> UnaryOperator<T>
    of(T value)
    Returns an operator that always returns the specified value, ignoring its parameter.
    default UnaryOperator<T>
    orDefault(Predicate<T> predicate, Supplier<T> defaultResult)
    Returns an operator that applies this function to the value returned by the specified provider if its value does not match the specified predicate.
    default UnaryOperator<T>
    withDefault(Predicate<T> predicate, Supplier<T> defaultValue)
    Returns an operator that applies this function if its parameter matches the specified predicate, or returns the value provided by the specified supplier otherwise.

    Methods inherited from interface java.util.function.Function

    apply

    Methods inherited from interface org.wildfly.clustering.function.Function

    andThen, compose, compose

  • Field Details

    • IDENTITY

      static final UnaryOperator<?> IDENTITY
      An identity operator that always returns its parameter

    • NULL

      static final UnaryOperator<?> NULL
      An operator that always returns null

  • Method Details

    • orDefault

      default UnaryOperator<T> orDefault(Predicate<T> predicate, Supplier<T> defaultResult)
      Returns an operator that applies this function to the value returned by the specified provider if its value does not match the specified predicate.
      Specified by:
      orDefault in interface Function<T,T>
      Parameters:
      predicate - a predicate used to determine the parameter of this function
      defaultResult - a provider of the default operation result
      Returns:
      an operator that applies this function to the value returned by the specified provider if its value does not match the specified predicate.

    • withDefault

      default UnaryOperator<T> withDefault(Predicate<T> predicate, Supplier<T> defaultValue)
      Returns an operator that applies this function if its parameter matches the specified predicate, or returns the value provided by the specified supplier otherwise.
      Specified by:
      withDefault in interface Function<T,T>
      Parameters:
      predicate - a predicate used to determine the parameter of this function
      defaultValue - a provider of the default parameter value
      Returns:
      an operator that applies this function if its parameter matches the specified predicate, or returns the value provided by the specified supplier otherwise.

    • andThen

      default UnaryOperator<T> andThen(UnaryOperator<T> operator)
      Returns an operator that applies the specified operator to the result of this operator.
      Parameters:
      operator - an operator to apply to the result of this operation
      Returns:
      an operator that applies the specified operator to the result of this operator.

    • compose

      default UnaryOperator<T> compose(UnaryOperator<T> operator)
      Returns an operator that applies this operator to the result of the specified operator.
      Parameters:
      operator - an operator to apply to the result of this operation
      Returns:
      an operator that applies this operator to the result of the specified operator.

    • handle

      default UnaryOperator<T> handle(BiFunction<T,RuntimeException,T> handler)
      Returns a new operator that delegates to this operator using the specified exception handler.
      Specified by:
      handle in interface Function<T,T>
      Parameters:
      handler - an exception handler
      Returns:
      a new operator that delegates to this operator using the specified exception handler.

    • identity

      static <T> UnaryOperator<T> identity()
      Returns an operator that returns its value.
      Type Parameters:
      T - the operating type
      Returns:
      an operator that returns its value.

    • empty

      static <T> UnaryOperator<T> empty()
      Returns an operator that always returns null, ignoring its parameter.
      Type Parameters:
      T - the operating type
      Returns:
      an operator that always returns null, ignoring its parameter.

    • of

      static <T> UnaryOperator<T> of(T value)
      Returns an operator that always returns the specified value, ignoring its parameter.
      Type Parameters:
      T - the operating type
      Parameters:
      value - the value returned by the operator
      Returns:
      an operator that always returns the specified value, ignoring its parameter.

    • of

      static <T> UnaryOperator<T> of(Consumer<T> consumer, Supplier<T> supplier)
      Returns an operator that accepts its parameter via the specified consumer and returns the value returned by the specified supplier.
      Type Parameters:
      T - the operator type
      Parameters:
      consumer - a consumer of the operator parameter
      supplier - the supplier of the operator result
      Returns:
      an operator that accepts its parameter via the specified consumer and returns the value returned by the specified supplier.

    • apply

      static <T> UnaryOperator<T> apply(Function<? super T,T> function)
      Returns an operator view of the specified function.
      Type Parameters:
      T - the operating type
      Parameters:
      function - the delegating function
      Returns:
      an operator view of the specified function.

    • entry

      static <K, V> UnaryOperator<Map.Entry<K,V>> entry(UnaryOperator<K> keyFunction, UnaryOperator<V> valueFunction)
      Returns a Map.Entry function from the specified key and value functions.
      Type Parameters:
      K - the entry key type
      V - the entry value type
      Parameters:
      keyFunction - an entry key function
      valueFunction - an entry value function
      Returns:
      a Map.Entry function from the specified key and value functions.