net.sf.jga.fn.adaptor
Class ChainBinary<T1,T2,F,R>

java.lang.Object
  net.sf.jga.fn.Functor<R>
      net.sf.jga.fn.BinaryFunctor<T1,T2,R>
          net.sf.jga.fn.adaptor.ChainBinary<T1,T2,F,R>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class ChainBinary<T1,T2,F,R>
extends BinaryFunctor<T1,T2,R>

Binary Functor that passes the results of a Binary Functor as the argument to a Unary Functor. This allows for the construction of compound functors from the primitives found in the arithmetic, logical, property, and comparison packages.

Copyright © 2002-2005 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

ChainBinary.Visitor Interface for classes that may interpret a ChainBinary functor.

Constructor Summary

ChainBinary(UnaryFunctor<F,R> f, BinaryFunctor<T1,T2,F> g)
Builds a ChainBinary functor, given outer functor f and inner functor g.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(ChainBinary) method, if it implements the nested Visitor interface.
R	fn(T1 x, T2 y) Passes arguments x and y to the inner functor, and passes the result to the outer functor.
BinaryFunctor<T1,T2,F>	getInnerFunctor() Returns the inner functor
UnaryFunctor<F,R>	getOuterFunctor() Returns the outer functor
java.lang.String	toString()

Methods inherited from class net.sf.jga.fn.BinaryFunctor

bind, bind0th, bind1st, bind2nd, bindNth, compose, compose, composeNth, distribute, eval, generate, generate1st, generate2nd, generateNth

Methods inherited from class net.sf.jga.fn.Functor

composeNth

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ChainBinary

public ChainBinary(UnaryFunctor<F,R> f,
                   BinaryFunctor<T1,T2,F> g)

Builds a ChainBinary functor, given outer functor f and inner functor g.

Throws:

java.lang.IllegalArgumentException - if any of the functors is missing

Method Detail

getOuterFunctor

public UnaryFunctor<F,R> getOuterFunctor()

Returns the outer functor

Returns:

the outer functor

getInnerFunctor

public BinaryFunctor<T1,T2,F> getInnerFunctor()

Returns the inner functor

Returns:

the inner functor

fn

public R fn(T1 x,
            T2 y)

Passes arguments x and y to the inner functor, and passes the result to the outer functor.

Specified by:

fn in class BinaryFunctor<T1,T2,R>

Returns:

f(g(x,y))

accept

public void accept(Visitor v)

Calls the Visitor's visit(ChainBinary) method, if it implements the nested Visitor interface.

Specified by:

accept in interface Visitable

Overrides:

accept in class Functor<R>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object