Class IsInstance<T>

java.lang.Object
org.apache.commons.functor.core.IsInstance<T>
Type Parameters:
T - the object instance has to be tested against the input class.
All Implemented Interfaces:
Serializable, BinaryFunctor<T,Class<?>>, BinaryPredicate<T,Class<?>>, Functor
public final class IsInstance<T> extends Object implements BinaryPredicate<T,Class<?>>, Serializable
Tests true iff its argument is an instance of some specified Class.
Version:
$Revision$ $Date$
See Also:

  • Field Details

    • INSTANCE

      public static final IsInstance<Object> INSTANCE
      Basic IsInstanceOf instance.

    • serialVersionUID

      private static final long serialVersionUID
      serialVersionUID declaration.
      See Also:

    • NONZERO_SHIFT_NUMBER

      private static final int NONZERO_SHIFT_NUMBER
      The non zero number used to shift the initial hashcode.
      See Also:

    • NONZERO_BITWISE_NUMBER

      private static final int NONZERO_BITWISE_NUMBER
      The non zero number used to bitwise or the hashcode.
      See Also:

  • Constructor Details

    • IsInstance

      public IsInstance()

  • Method Details

    • test

      public boolean test(T left, Class<?> right)
      Evaluate this predicate.
      Specified by:
      test in interface BinaryPredicate<T,Class<?>>
      Parameters:
      left - the L element of the ordered pair of arguments
      right - the R element of the ordered pair of arguments
      Returns:
      the result of this test for the given arguments

    • equals

      public boolean equals(Object that)
      Indicates whether some other object is "equal to" this functor. This method must adhere to general Object.equals contract. Additionally, this method can return true only if the specified Object implements the same functor interface and is known to produce the same results and/or side-effects for the same arguments (if any).

      While implementators are strongly encouraged to override the default Object implementation of this method, note that the default Object implementation does in fact adhere to the functor equals contract.

      Specified by:
      equals in interface Functor
      Overrides:
      equals in class Object
      Parameters:
      that - the object to compare this functor to
      Returns:
      true iff the given object implements this functor interface, and is known to produce the same results and/or side-effects for the same arguments (if any).
      See Also:

    • hashCode

      public int hashCode()
      Returns a hash code for this functor adhering to the general Object.hashCode contract. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.
      Specified by:
      hashCode in interface Functor
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this functor
      See Also:

    • toString

      public String toString()
      Returns a human readable description of this functor. Implementators are strongly encouraged but not strictly required to override the default Object implementation of this method.
      Specified by:
      toString in interface Functor
      Overrides:
      toString in class Object
      Returns:
      a human readable description of this functor

    • instance

      public static <T> IsInstance<T> instance()
      Get an IsInstance instance.
      Type Parameters:
      T - the object instance has to be tested against the input class.
      Returns:
      IsInstance

    • of

      public static <T> UnaryPredicate<T> of(Class<?> clazz)
      Get an IsInstanceOf UnaryPredicate.
      Type Parameters:
      T - the object instance has to be tested against the input class.
      Parameters:
      clazz - bound right-side argument
      Returns:
      UnaryPredicate