org.sadun.util.polling
Class DirectoryPoller.ModificationTimeComparator

java.lang.Object
  org.sadun.util.BidirectionalComparator
      org.sadun.util.polling.DirectoryPoller.ModificationTimeComparator

All Implemented Interfaces:

java.util.Comparator

Direct Known Subclasses:

FIFOFileComparator, LIFOFileComparator

Enclosing class:

DirectoryPoller

public static class DirectoryPoller.ModificationTimeComparator

extends org.sadun.util.BidirectionalComparator

This comparator can be used to list files based on modification time.

Author:

Cristiano Sadun

Field Summary

Fields inherited from class org.sadun.util.BidirectionalComparator

ascending

Constructor Summary

DirectoryPoller.ModificationTimeComparator(boolean ascending)
Create a comparator which will impose an ascending or descending order on modification times depending on the value of the parameter

Method Summary

protected long

getComparisonValue(java.io.File f1, java.io.File f2) Must return the comparation value (0, greater than 0 or lower than 0) for the two files.

Methods inherited from class org.sadun.util.BidirectionalComparator

compare, computeResultFromValue

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

Constructor Detail

DirectoryPoller.ModificationTimeComparator

public DirectoryPoller.ModificationTimeComparator(boolean ascending)

Create a comparator which will impose an ascending or descending order on modification times depending on the value of the parameter

Parameters:

ascending - if true, older files will be ordered before newer files.

Method Detail

getComparisonValue

protected final long getComparisonValue(java.io.File f1,
                                        java.io.File f2)

Description copied from class: org.sadun.util.BidirectionalComparator

Must return the comparation value (0, greater than 0 or lower than 0) for the two files.

Returns:

the comparation value (0, greater than 0 or lower than 0) for the two files.