org.unix4j.util.sort

Class VersionStringComparator

java.lang.Object

org.unix4j.util.sort.VersionStringComparator

All Implemented Interfaces:

java.util.Comparator<java.lang.CharSequence>

public class VersionStringComparator
extends java.lang.Object
implements java.util.Comparator<java.lang.CharSequence>

A comparator for version strings similar to "V1.34.123" consisting of optional blanks. The characters '.', '-' and ':' are treated as group delimiters. Each group is sorted numerically if possible. If two values are non-numeric, the string are compared instead. If one value is non-numeric, it comes first.

Field Summary

Fields

Modifier and Type	Field and Description
static VersionStringComparator	INSTANCE The singelton instance.

Method Summary

Modifier and Type	Method and Description
int	compare(java.lang.CharSequence s1, java.lang.CharSequence 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

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

Field Detail

INSTANCE

public static final VersionStringComparator INSTANCE

The singelton instance.

Method Detail

compare

public int compare(java.lang.CharSequence s1,
                   java.lang.CharSequence s2)

Specified by:

compare in interface java.util.Comparator<java.lang.CharSequence>