net.sf.jga.fn.algorithm
Class MaxValue<T>

java.lang.Object
  net.sf.jga.fn.UnaryFunctor<java.util.Collection<? extends T>,T>
      net.sf.jga.fn.algorithm.MaxValue<T>

All Implemented Interfaces:

java.io.Serializable, Visitable

public class MaxValue<T>
extends UnaryFunctor<java.util.Collection<? extends T>,T>

Identifies the largest value in a collection.

To serialize a MaxValue, the comparator passed at construction must be Serializable.

Copyright © 2003 David A. Hall

Author:

David A. Hall

See Also:

Serialized Form

Nested Class Summary

static interface

MaxValue.Visitor Interface for classes that may interpret an MaxValue functor.

Constructor Summary

MaxValue(java.util.Comparator<T> comp)
Builds a MaxValue functor that will use the given comparator to compare elements in the collection.

Method Summary

void	accept(Visitor v) Calls the Visitor's visit(MaxValue) method, if it implements the nested Visitor interface.
T	fn(java.util.Collection<? extends T> collection) Returns the largest value in the collection
java.util.Comparator<T>	getComparator() Returns the comparator used to order values in the collection.
java.lang.String	toString()

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

bind, compose, compose, generate

Methods inherited from class java.lang.Object

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

Constructor Detail

MaxValue

public MaxValue(java.util.Comparator<T> comp)

Builds a MaxValue functor that will use the given comparator to compare elements in the collection. Typically, the functor would compare its two arguments and return the greater value.

Throws:

java.lang.IllegalArgumentException - if the Comparator is null

Method Detail

getComparator

public java.util.Comparator<T> getComparator()

Returns the comparator used to order values in the collection.

fn

public T fn(java.util.Collection<? extends T> collection)

Returns the largest value in the collection

Specified by:

fn in class UnaryFunctor<java.util.Collection<? extends T>,T>

Throws:

NoSuchElementException - if the collection is empty

accept

public void accept(Visitor v)

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

Specified by:

accept in interface Visitable

Overrides:

accept in class UnaryFunctor<java.util.Collection<? extends T>,T>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object