org.randomcoder.download
Class VersionComparator

java.lang.Object
  org.randomcoder.download.VersionComparator

All Implemented Interfaces:

Comparator<String>

public class VersionComparator
extends Object
implements Comparator<String>

Comparator which compares project version numbers.

 Copyright (c) 2007, Craig Condit. All rights reserved.
 
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 modification, are permitted provided that the following conditions are met:
 
   * Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice,
     this list of conditions and the following disclaimer in the documentation
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 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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Constructor Summary

VersionComparator()

Method Summary

int	compare(String version1, String version2) Compares one artifact version to another.

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

equals

Constructor Detail

VersionComparator

public VersionComparator()

Method Detail

compare

public int compare(String version1,
                   String version2)

Compares one artifact version to another.

NOTE: This comparison is somewhat naive... it will split version components by periods, and then by dashes, comparing each part numerically if possible.

Specified by:

compare in interface Comparator<String>

Parameters:

version1 - first version

version2 - second version

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.