Package org.apache.commons.functor.core

Class IsNotNull<T>

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static IsNotNull<java.lang.Object> INSTANCE
      Basic IsNotNull instance.
      static BinaryPredicate<java.lang.Object,​java.lang.Object> LEFT
      Left-handed BinaryPredicate.
      static BinaryPredicate<java.lang.Object,​java.lang.Object> RIGHT
      Right-handed BinaryPredicate.
      private static long serialVersionUID
      serialVersionUID declaration.

    • Constructor Summary

      Constructors 
      Constructor Description
      IsNotNull()
      Create a new IsNotNull.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.Object that)
      Indicates whether some other object is "equal to" this functor.
      int hashCode()
      Returns a hash code for this functor adhering to the general Object.hashCode contract.
      static <T> IsNotNull<T> instance()
      Get an IsNotNull instance.
      static <A> BinaryPredicate<A,​java.lang.Object> left()
      Get a BinaryPredicate that matches if the left argument is not null.
      static <A> BinaryPredicate<java.lang.Object,​A> right()
      Get a BinaryPredicate that matches if the right argument is null.
      boolean test​(java.lang.Object obj)
      Evaluate this predicate.
      java.lang.String toString()
      Returns a human readable description of this functor.

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Field Detail

      • INSTANCE

        public static final IsNotNull<java.lang.Object> INSTANCE
        Basic IsNotNull instance.

      • LEFT

        public static final BinaryPredicate<java.lang.Object,​java.lang.Object> LEFT
        Left-handed BinaryPredicate.

      • RIGHT

        public static final BinaryPredicate<java.lang.Object,​java.lang.Object> RIGHT
        Right-handed BinaryPredicate.

      • serialVersionUID

        private static final long serialVersionUID
        serialVersionUID declaration.
        See Also:
        Constant Field Values

    • Constructor Detail

      • IsNotNull

        public IsNotNull()
        Create a new IsNotNull.

    • Method Detail

      • test

        public boolean test​(java.lang.Object obj)
        Evaluate this predicate.
        Specified by:
        test in interface UnaryPredicate<T>
        Parameters:
        obj - the A object to test
        Returns:
        the result of this test

      • equals

        public boolean equals​(java.lang.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 java.lang.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:
        Functor.hashCode()

      • 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 java.lang.Object
        Returns:
        a hash code for this functor
        See Also:
        Functor.equals(java.lang.Object)

      • toString

        public java.lang.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 java.lang.Object
        Returns:
        a human readable description of this functor

      • instance

        public static <T> IsNotNull<T> instance()
        Get an IsNotNull instance.
        Type Parameters:
        T - the predicate argument type.
        Returns:
        IsNotNull

      • left

        public static <A> BinaryPredicate<A,​java.lang.Object> left()
        Get a BinaryPredicate that matches if the left argument is not null.
        Type Parameters:
        A - the left BinaryPredicate argument type.
        Returns:
        BinaryPredicate

      • right

        public static <A> BinaryPredicate<java.lang.Object,​A> right()
        Get a BinaryPredicate that matches if the right argument is null.
        Type Parameters:
        A - the right BinaryPredicate argument type.
        Returns:
        BinaryPredicate