Package org.apache.commons.io.comparator

Class ReverseComparator

java.lang.Object

org.apache.commons.io.comparator.AbstractFileComparator

org.apache.commons.io.comparator.ReverseComparator

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<java.io.File>

class ReverseComparator
extends AbstractFileComparator
implements java.io.Serializable

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

Since:

1.4

Version:

$Id: ReverseComparator.java 1304052 2012-03-22 20:55:29Z ggregory $

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Comparator<java.io.File>	delegate

Constructor Summary

Constructors

Constructor	Description
ReverseComparator(java.util.Comparator<java.io.File> delegate)	Construct an instance with the sepecified delegate Comparator.

Method Summary

Modifier and Type	Method	Description
int	compare(java.io.File file1, java.io.File file2)	Compare using the delegate Comparator, but reversing the result.
java.lang.String	toString()	String representation of this file comparator.

Methods inherited from class org.apache.commons.io.comparator.AbstractFileComparator

sort, sort

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from class java.lang.Object

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

Field Detail

delegate

private final java.util.Comparator<java.io.File> delegate

Constructor Detail

ReverseComparator

public ReverseComparator(java.util.Comparator<java.io.File> delegate)

Construct an instance with the sepecified delegate Comparator.

Parameters:

delegate - The comparator to delegate to

Method Detail

compare

public int compare(java.io.File file1,
                   java.io.File file2)

Compare using the delegate Comparator, but reversing the result.

Specified by:

compare in interface java.util.Comparator<java.io.File>

Parameters:

file1 - The first file to compare

file2 - The second file to compare

Returns:

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

toString

public java.lang.String toString()

String representation of this file comparator.

Overrides:

toString in class AbstractFileComparator

Returns:

String representation of this file comparator