org.apache.hadoop.util

Class ComparableVersion

java.lang.Object

org.apache.hadoop.util.ComparableVersion

All Implemented Interfaces:

Comparable<ComparableVersion>

public class ComparableVersion
extends Object
implements Comparable<ComparableVersion>

Generic implementation of version comparison.

Features:

• mixing of '-' (dash) and '.' (dot) separators,
• transition between characters and digits also constitutes a separator: 1.0alpha1 => [1, 0, alpha, 1]
• unlimited number of version components,
• version components in the text can be digits or strings,
• strings are checked for well-known qualifiers and the qualifier ordering is used for version ordering. Well-known qualifiers (case insensitive) are:
  • alpha or a
  • beta or b
  • milestone or m
  • rc or cr
  • snapshot
  • (the empty string) or ga or final
  • sp
  Unknown qualifiers are considered after known qualifiers, with lexical order (always case insensitive),
• a dash usually precedes a qualifier, and is always less important than something preceded with a dot.

See Also:

"Versioning" on Maven Wiki

Constructor Summary

Constructors

Constructor and Description
ComparableVersion(String version)

Method Summary

Modifier and Type	Method and Description
int	compareTo(ComparableVersion o)
boolean	equals(Object o)
int	hashCode()
void	parseVersion(String version)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ComparableVersion

public ComparableVersion(String version)

Method Detail

parseVersion

public final void parseVersion(String version)

compareTo

public int compareTo(ComparableVersion o)

Specified by:

compareTo in interface Comparable<ComparableVersion>

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object