Package org.eclipse.aether.util.version

Class GenericVersionScheme

java.lang.Object
org.eclipse.aether.util.version.VersionSchemeSupport
org.eclipse.aether.util.version.GenericVersionScheme
All Implemented Interfaces:
VersionScheme
public class GenericVersionScheme extends VersionSchemeSupport
A version scheme using a generic version syntax and common sense sorting.

This scheme accepts versions of any form, interpreting a version as a sequence of numeric and alphabetic segments. The characters '-', '_', and '.' as well as the mere transitions from digit to letter and vice versa delimit the version segments. Delimiters are treated as equivalent.

Numeric segments are compared mathematically, alphabetic segments are compared lexicographically and case-insensitively. However, the following qualifier strings are recognized and treated specially: "alpha" = "a" < "beta" = "b" < "milestone" = "m" < "cr" = "rc" < "snapshot" < "final" = "ga" < "sp". All of those well-known qualifiers are considered smaller/older than other strings. An empty segment/string is equivalent to 0.

In addition to the above mentioned qualifiers, the tokens "min" and "max" may be used as final version segment to denote the smallest/greatest version having a given prefix. For example, "1.2.min" denotes the smallest version in the 1.2 line, "1.2.max" denotes the greatest version in the 1.2 line. A version range of the form "[M.N.*]" is short for "[M.N.min, M.N.max]".

Numbers and strings are considered incomparable against each other. Where version segments of different kind would collide, comparison will instead assume that the previous segments are padded with trailing 0 or "ga" segments, respectively, until the kind mismatch is resolved, e.g. "1-alpha" = "1.0.0-alpha" < "1.0.1-ga" = "1.0.1".

  • Constructor Details

  • Method Details

    • parseVersion

      public GenericVersion parseVersion(String version) throws InvalidVersionSpecificationException
      Description copied from interface: VersionScheme
      Parses the specified version string, for example "1.0".
      Parameters:
      version - The version string to parse, must not be null.
      Returns:
      The parsed version, never null.
      Throws:
      InvalidVersionSpecificationException - If the string violates the syntax rules of this scheme.

    • getCacheStatistics

      public String getCacheStatistics()
      Get cache statistics for this instance.

    • main

      public static void main(String... args)
      A handy main method that behaves similarly like maven-artifact ComparableVersion is, to make possible test and possibly compare differences between the two.

      To check how "1.2.7" compares to "1.2-SNAPSHOT", for example, you can issue 

      jbang --main=org.eclipse.aether.util.version.GenericVersionScheme org.apache.maven.resolver:maven-resolver-util:1.9.18 "1.2.7" "1.2-SNAPSHOT"
      command to command line, output is very similar to that of ComparableVersion on purpose.