org.apache.commons.io.comparator

Class ReverseFileComparator

java.lang.Object

org.apache.commons.io.comparator.AbstractFileComparator

org.apache.commons.io.comparator.ReverseFileComparator

All Implemented Interfaces:

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

final class ReverseFileComparator
extends AbstractFileComparator
implements java.io.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 and Description
private java.util.Comparator<java.io.File>	delegate
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
ReverseFileComparator(java.util.Comparator<java.io.File> delegate) Constructs an instance with the specified delegate Comparator.

Method Summary

Modifier and Type	Method and Description
int	compare(java.io.File file1, java.io.File file2) Compares using the delegate Comparator, reversing the result.
java.lang.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

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

delegate

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

Constructor Detail

ReverseFileComparator

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

Constructs an instance with the specified delegate Comparator.

Parameters:

delegate - The comparator to delegate to.

Method Detail

compare

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

Compares using the delegate Comparator, 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()

Returns the String representation of this file comparator.

Overrides:

toString in class AbstractFileComparator

Returns:

String representation of this file comparator.