net.sf.jga.fn.adaptor
Class ComposeBinary<T1,T2,F1,F2,R>

java.lang.Object
  net.sf.jga.fn.Functor<R>
      net.sf.jga.fn.BinaryFunctor<T1,T2,R>
          net.sf.jga.fn.adaptor.ComposeBinary<T1,T2,F1,F2,R>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class ComposeBinary<T1,T2,F1,F2,R>
extends BinaryFunctor<T1,T2,R>

Binary Functor that passes the results of two inner Binary Functors as the arguments to an outer Binary 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

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

Constructor Summary

ComposeBinary(BinaryFunctor<T1,T2,F1> f, BinaryFunctor<T1,T2,F2> g, BinaryFunctor<F1,F2,R> h)
Builds a ComposeBinary functor, given two inner functors f and g, and outer functor h.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(ComposeBinary) method, if it implements the nested Visitor interface.
R	fn(T1 x, T2 y) Given argument x, passes x to both inner functors, and passes the results of those functors to the outer functor.
BinaryFunctor<T1,T2,F1>	getFirstInnerFunctor() Returns the first of two inner functors
BinaryFunctor<F1,F2,R>	getOuterFunctor() Returns the outer functor
BinaryFunctor<T1,T2,F2>	getSecondInnerFunctor() Returns the second of two inner functors
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

ComposeBinary

public ComposeBinary(BinaryFunctor<T1,T2,F1> f,
                     BinaryFunctor<T1,T2,F2> g,
                     BinaryFunctor<F1,F2,R> h)

Builds a ComposeBinary functor, given two inner functors f and g, and outer functor h.

Throws:

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

Method Detail

getFirstInnerFunctor

public BinaryFunctor<T1,T2,F1> getFirstInnerFunctor()

Returns the first of two inner functors

Returns:

the first of two inner functors

getSecondInnerFunctor

public BinaryFunctor<T1,T2,F2> getSecondInnerFunctor()

Returns the second of two inner functors

Returns:

the second of two inner functors

getOuterFunctor

public BinaryFunctor<F1,F2,R> getOuterFunctor()

Returns the outer functor

Returns:

the outer functor

fn

public R fn(T1 x,
            T2 y)

Given argument x, passes x to both inner functors, and passes the results of those functors to the outer functor.

Specified by:

fn in class BinaryFunctor<T1,T2,R>

Returns:

h(f(x,y), g(x,y))

accept

public void accept(Visitor v)

Calls the Visitor's visit(ComposeBinary) 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