ReverseFileComparator

java.lang.Object

org.apache.commons.io.comparator.AbstractFileComparator

org.apache.commons.io.comparator.ReverseFileComparator

All Implemented Interfaces:: Serializable, Comparator<File>

final class ReverseFileComparator extends AbstractFileComparator implements Serializable

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

Deprecating Serialization

Serialization is deprecated and will be removed in 3.0.

Since:: 1.4

Field Summary

Fields

Modifier and Type

Field

Description

private final Comparator<File>

delegate

private static final long

serialVersionUID
Constructor Summary

Constructors

Constructor

Description

ReverseFileComparator(Comparator<File> delegate)

Constructs an instance with the specified delegate Comparator.
Method Summary

Modifier and Type

Method

Description

int

compare(File file1, File file2)

Compares using the delegate Comparator, reversing the result.

String

toString()

Returns the String representation of this file comparator.

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Details
- serialVersionUID
  
  private static final long serialVersionUID
  See Also:
  
  Constant Field Values
- delegate
  
  private final Comparator<File> delegate
Constructor Details
- ReverseFileComparator
  
  public ReverseFileComparator(Comparator<File> delegate)
  
  Constructs an instance with the specified delegate Comparator.
  
  Parameters:
  
  delegate - The comparator to delegate to.
Method Details
- compare
  
  public int compare(File file1, File file2)
  
  Compares using the delegate Comparator, reversing the result.
  
  Specified by:
  
  compare in interface Comparator<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 String toString()
  
  Returns the String representation of this file comparator.
  
  Overrides:
  
  toString in class AbstractFileComparator
  
  Returns:
  
  String representation of this file comparator.