Package org.nuiton.version

Class VersionComparator

  • All Implemented Interfaces:
    Serializable, Comparator<Version>
    public class VersionComparator
extends Object
implements Comparator<Version>, Serializable
    Comparator of Version. You may be before this the documentation of Version object...

    Version componant ordering

    We can compare only componants of same type. Number componants use natural number ordering (0<1<2,...) (see Version.NumberVersionComponant). String componants use preRelease flag order (preRelease is before any other string componant) then natural character ordering of the lowerCase componant value. (see Version.StringVersionComponant). 
    alpha == Alpha, aa > rc

    Snapshot ordering

    A snapshot version is before the exact same version without the flag. 
    1.1-SNAPSHOT < 1.1

    General ordering algorithm

    We compare version componants at same position until there is a difference. If common componants of version are both equals, have a look to the next componant of the longuest version (if the version have the same componants size, Versions are equals!). If the next componant is a number, the longuest version is after the other one: 
    1 < 1.0
    If the next componant is a classifier, we consider the componant preRelease flag, if setted then the longuest version is before the other one, if no, after: 
    1-alpha < 1 < 1-aa

    Examples

    Here is a list of ordered versions: 
     0-SNAPSHOT
 0
 0.1
 0.2
 0.2-alpha
 0.2-alpha-1
 0.2-alpha-2-SNAPSHOT
 0.2-alpha-2
 0.2-beta
 0.2-beta-1
 0.2-rc-1
 0.2
 0.2-aa
    Created on 7/11/14.
    Since:
    1.0
    Author:
    Tony Chemit - chemit@codelutin.com
    See Also:
    Version, Serialized Form

    • Constructor Detail

      • VersionComparator

        public VersionComparator()

    • Method Detail

      • main

        public static void main​(String... args)
        Sort in reverse order the given versions and print them to the standard output.
        Parameters:
        args - versions to sort