se.sawano.java.text

Class AlphanumericComparator

java.lang.Object

se.sawano.java.text.AlphanumericComparator

All Implemented Interfaces:

Comparator<CharSequence>

public class AlphanumericComparator
extends Object
implements Comparator<CharSequence>

https://github.com/sawano/alphanumeric-comparator

Author:

dave

Field Summary

Fields

Modifier and Type	Field and Description
private Collator	collator

Constructor Summary

Constructors

Constructor and Description
AlphanumericComparator() Creates a comparator that will use lexicographical sorting of the non-numerical parts of the compared strings.
AlphanumericComparator(Collator collator) Creates a comparator that will use the given collator to sort the non-numerical parts of the compared strings.
AlphanumericComparator(Locale locale) Creates a comparator that will use locale-sensitive sorting of the non-numerical parts of the compared strings.

Method Summary

Modifier and Type	Method and Description
private int	compare(CharBuffer b1, CharBuffer b2)
int	compare(CharSequence s1, CharSequence s2)
private int	compareAsStrings(CharBuffer b1, CharBuffer b2)
private int	compareNumerically(CharBuffer b1, CharBuffer b2)
private boolean	isDigit(char c)
private boolean	isNumerical(CharBuffer buffer)
private boolean	isZero(char c)
private void	moveWindow(CharBuffer buffer)
private void	prepareForNextIteration(CharBuffer buffer)

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

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

Field Detail

collator

private final Collator collator

Constructor Detail

AlphanumericComparator

public AlphanumericComparator()

Creates a comparator that will use lexicographical sorting of the non-numerical parts of the compared strings.

AlphanumericComparator

public AlphanumericComparator(Locale locale)

Creates a comparator that will use locale-sensitive sorting of the non-numerical parts of the compared strings.

Parameters:

locale - the locale to use

AlphanumericComparator

public AlphanumericComparator(Collator collator)

Creates a comparator that will use the given collator to sort the non-numerical parts of the compared strings.

Parameters:

collator - the collator to use

Method Detail

compare

public int compare(CharSequence s1,
                   CharSequence s2)

Specified by:

compare in interface Comparator<CharSequence>

moveWindow

private void moveWindow(CharBuffer buffer)

compare

private int compare(CharBuffer b1,
                    CharBuffer b2)

isNumerical

private boolean isNumerical(CharBuffer buffer)

isDigit

private boolean isDigit(char c)

compareNumerically

private int compareNumerically(CharBuffer b1,
                               CharBuffer b2)

prepareForNextIteration

private void prepareForNextIteration(CharBuffer buffer)

compareAsStrings

private int compareAsStrings(CharBuffer b1,
                             CharBuffer b2)

isZero

private boolean isZero(char c)