org.mindswap.pellet.utils

Class AlphaNumericComparator

java.lang.Object

org.mindswap.pellet.utils.AlphaNumericComparator

All Implemented Interfaces:

Comparator<Object>

public class AlphaNumericComparator
extends Object
implements Comparator<Object>

This is a comparator to perform a mix of alphabetical+numeric comparison. For example, if there is a list {"test10", "test2", "test150", "test25", "test1"} then what we generally expect from the ordering is the result {"test1", "test2", "test10", "test25", "test150"}. However, standard lexicographic ordering does not do that and "test10" comes before "test2". This class is provided to overcome that problem. This functionality is useful to sort the benchmark files (like the ones in in DL-benchmark-suite) from smallest to the largest. Comparisons are done on the String values returned by toString() so care should be taken when this comparator is used to sort arbitrary Java objects.

Author:

Evren Sirin

Field Summary

Fields

Modifier and Type	Field and Description
static AlphaNumericComparator	CASE_INSENSITIVE A static instantiation of a case insensitive AlphaNumericComparator
static AlphaNumericComparator	CASE_SENSITIVE A static instantiation of a case sensitive AlphaNumericComparator

Constructor Summary

Constructors

Constructor and Description
AlphaNumericComparator() Create a case sensitive AlphaNumericComparator
AlphaNumericComparator(boolean caseSensitive) Create an AlphaNumericComparator

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(Object o1, Object o2)

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

Field Detail

CASE_SENSITIVE

public static final AlphaNumericComparator CASE_SENSITIVE

A static instantiation of a case sensitive AlphaNumericComparator

CASE_INSENSITIVE

public static final AlphaNumericComparator CASE_INSENSITIVE

A static instantiation of a case insensitive AlphaNumericComparator

Constructor Detail

AlphaNumericComparator

public AlphaNumericComparator()

Create a case sensitive AlphaNumericComparator

AlphaNumericComparator

public AlphaNumericComparator(boolean caseSensitive)

Create an AlphaNumericComparator

Parameters:

caseSensitive - if true comparisons are case sensitive

Method Detail

compare

public int compare(Object o1,
          Object o2)

Specified by:

compare in interface Comparator<Object>