org.apache.commons.functor (Apache Commons Functor 1.0-SNAPSHOT API)

Interface Summary
Interface	Description
BinaryFunction<L,R,T>	A functor that takes two arguments and returns a value.
BinaryFunctor<L,R>	Marker interface for binary (two-argument) functors.
BinaryPredicate<L,R>	A functor that takes two arguments and returns a `boolean` value.
BinaryProcedure<L,R>	A functor that takes two arguments and has no return value.
Function<A,T>	A functor that takes one argument and returns an `Object` value.
Functor	Functor marker interface.
NullaryFunction<T>	A functor that takes no arguments and returns a value.
NullaryFunctor	Marker interface for nullary (zero-argument) functors.
NullaryPredicate	A functor that takes no arguments and returns a `boolean` value.
NullaryProcedure	A functor that takes no arguments and returns no value.
Predicate<A>	A functor that takes one argument and returns a `boolean` value.
Procedure<A>	A functor that takes one argument and returns no value.
UnaryFunctor<A>	Marker interface for unary (single-argument) functors.

Package org.apache.commons.functor Description

Basic functor interfaces.

Implementors are encouraged, but not strictly required, to make each functor implementation Serializable.

Note that each functor interface extends the Object.equals contract to state that equals 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). Note that the default Object.equals implementation does in fact adhere to the functor equals contract.