org.apache.commons.io.comparator
Class ReverseComparator

java.lang.Object
  org.apache.commons.io.comparator.ReverseComparator

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator

 class ReverseComparator
extends java.lang.Object
implements java.util.Comparator, java.io.Serializable

Reverses the result of comparing two objects using the delegate Comparator.

Since:

Commons IO 1.4

Version:

$Revision: 609243 $ $Date: 2008-01-06 00:30:42 +0000 (Sun, 06 Jan 2008) $

Field Summary

private java.util.Comparator

delegate

Constructor Summary

ReverseComparator(java.util.Comparator delegate)
Construct an instance with the sepecified delegate Comparator.

Method Summary

int	compare(java.lang.Object obj1, java.lang.Object obj2) Compare using the delegate Comparator, but reversing the result.

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

delegate

private final java.util.Comparator delegate

Constructor Detail

ReverseComparator

public ReverseComparator(java.util.Comparator delegate)

Construct an instance with the sepecified delegate Comparator.

Parameters:

delegate - The comparator to delegate to

Method Detail

compare

public int compare(java.lang.Object obj1,
                   java.lang.Object obj2)

Compare using the delegate Comparator, but reversing the result.

Specified by:

compare in interface java.util.Comparator

Parameters:

obj1 - The first object to compare

obj2 - The second object to compare

Returns:

the result from the delegate Comparator.compare(Object, Object) reversing the value (i.e. positive becomes negative and vice versa)