nc.ird.module.utils

Class IntuitiveStringComparator<T extends CharSequence>

java.lang.Object

nc.ird.module.utils.IntuitiveStringComparator<T>

Type Parameters:

T - generic type

All Implemented Interfaces:

Comparator<T>

public class IntuitiveStringComparator<T extends CharSequence>
extends Object
implements Comparator<T>

A comparator that emulates the "intuitive" sorting used by Windows Explorer. The rules are as follows:

• Any sequence of one or more digits is treated as an atomic unit, a number. When these number units are matched up, they're compared according to their respective numeric values. If they're numerically equal, but one has more leading zeroes than the other, the longer sequence is considered larger.
• Numbers always sort before any other kind of character.
• Spaces and all punctuation characters always sort before letters.
• Letters are sorted case-insensitively.

Explorer's sort order for punctuation characters is not quite the same as their ASCII order. Also, some characters aren't allowed in file names, so I don't know how they would be sorted. This class just sorts them all according to their ASCII values.

This comparator is only guaranteed to work with 7-bit ASCII strings.

Author:

Alan Moore

Constructor Summary

Constructors

Constructor and Description
IntuitiveStringComparator()

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(T s1, T s2)

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

IntuitiveStringComparator

public IntuitiveStringComparator()

Method Detail

compare

public int compare(T s1,
          T s2)

Specified by:

compare in interface Comparator<T extends CharSequence>