com.jalios.util
Class ReverseComparator<T>

java.lang.Object
  com.jalios.util.ReverseComparator<T>

All Implemented Interfaces:

Comparator<T>

public class ReverseComparator<T>
extends Object
implements Comparator<T>

This class is comparator which reverse the ordering of a given comparator.

Version:

$Revision: 21407 $

Author:

Olivier Dedieu

Field Summary

protected Comparator<T>	comparator
static String	REVISION

Constructor Summary

ReverseComparator()
Defaut constructor reverse NaturalComparator Objects mus be Comparable

ReverseComparator(Comparator<T> comparator)
This constructor will reverse returned value by given comparator.

Method Summary

int	compare(T o1, T o2)
Comparator<T>	getReversedComparator() Retrieve the Comparator this ReverseComparator is reversing or null when the natural Comparator is reversed.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Field Detail

REVISION

public static final String REVISION

See Also:

Constant Field Values

comparator

protected Comparator<T> comparator

Constructor Detail

ReverseComparator

public ReverseComparator()

Defaut constructor reverse NaturalComparator Objects mus be Comparable

ReverseComparator

public ReverseComparator(Comparator<T> comparator)

This constructor will reverse returned value by given comparator.

Parameters:

comparator - used to compare object

Method Detail

getReversedComparator

public Comparator<T> getReversedComparator()

Retrieve the Comparator this ReverseComparator is reversing or null when the natural Comparator is reversed.

Returns:

the Comparator instance being used or null if we are reversing the natural Comparator of the objects.

compare

public int compare(T o1,
                   T o2)

Specified by:

compare in interface Comparator<T>