Class Int2BooleanFunctions.Singleton

  • All Implemented Interfaces:
    Function<java.lang.Integer,​java.lang.Boolean>, Int2BooleanFunction, java.io.Serializable, java.lang.Cloneable, java.util.function.Function<java.lang.Integer,​java.lang.Boolean>, java.util.function.IntPredicate
    Direct Known Subclasses:
    Int2BooleanMaps.Singleton
    Enclosing class:
    Int2BooleanFunctions

    public static class Int2BooleanFunctions.Singleton
    extends AbstractInt2BooleanFunction
    implements java.io.Serializable, java.lang.Cloneable
    An immutable class representing a type-specific singleton function. Note that the default return value is still settable.

    Note that albeit the function is immutable, its default return value may be changed.

    This class may be useful to implement your own in case you subclass a type-specific function.

    See Also:
    Serialized Form
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object clone()  
      boolean containsKey​(int k)
      Returns true if this function contains a mapping for the specified key.
      boolean get​(int k)
      Returns the value to which the given key is mapped.
      int size()
      Returns the intended number of keys in this function, or -1 if no such number exists.
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
      • Methods inherited from interface java.util.function.Function

        andThen, compose
      • Methods inherited from interface java.util.function.IntPredicate

        and, negate, or
    • Method Detail

      • containsKey

        public boolean containsKey​(int k)
        Description copied from interface: Int2BooleanFunction
        Returns true if this function contains a mapping for the specified key.

        Note that for some kind of functions (e.g., hashes) this method will always return true. In particular, this default implementation always returns true.

        Specified by:
        containsKey in interface Int2BooleanFunction
        Parameters:
        k - the key.
        Returns:
        true if this function associates a value to key.
        See Also:
        Function.containsKey(Object)
      • size

        public int size()
        Description copied from interface: Function
        Returns the intended number of keys in this function, or -1 if no such number exists.

        Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible. This default implementation, in particular, returns -1.

        Specified by:
        size in interface Function<java.lang.Integer,​java.lang.Boolean>
        Returns:
        the intended number of keys in this function, or -1 if that number is not available.
      • clone

        public java.lang.Object clone()