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Library that provides facilities to allow project information to be manipulated in Java and .Net. Supports a range of data formats: Microsoft Project Exchange (MPX), Microsoft Project (MPP,MPT), Microsoft Project Data Interchange (MSPDI XML), Microsoft Project Database (MPD), Planner (XML), Primavera (PM XML, XER, and database), Asta Powerproject (PP, MDB), Asta Easyplan (PP), Phoenix Project Manager (PPX), FastTrack Schedule (FTS), and the Standard Data Exchange Format (SDEF).

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/*
 * file:       SemVer.java
 * author:     Jon Iles
 * copyright:  (c) Packwood Software 2020
 * date:       2020-06-16
 */

/*
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

package net.sf.mpxj.common;

import java.util.Arrays;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

/**
 * Simple semantic version representation, with comparison methods.
 */
public final class SemVer implements Comparable
{
   /**
    * Constructor.
    *
    * @param version integer version components
    */
   public SemVer(int... version)
   {
      m_version = version;
   }

   /**
    * Constructor.
    *
    * @param version string version with dot separators
    */
   public SemVer(String version)
   {
      this(Arrays.stream(version.split("\\.")).mapToInt(x -> Integer.parseInt(x)).toArray());
   }

   /**
    * Comparator.
    *
    * @param otherVersion version to compare
    * @return true if  this version is greater than or equal to the other version
    */
   public boolean atLeast(SemVer otherVersion)
   {
      return compareTo(otherVersion) >= 0;
   }

   /**
    * Comparator.
    *
    * @param otherVersion version to compare
    * @return true if  this version is less than the other version
    */
   public boolean before(SemVer otherVersion)
   {
      return compareTo(otherVersion) < 0;
   }

   @Override public int compareTo(SemVer o)
   {
      int maxLength = Math.max(m_version.length, o.m_version.length);
      for (int index = 0; index < maxLength; index++)
      {
         int thisValue = m_version.length > index ? m_version[index] : 0;
         int otherValue = o.m_version.length > index ? o.m_version[index] : 0;

         if (thisValue == otherValue)
         {
            continue;
         }

         return thisValue - otherValue;
      }

      return 0;
   }

   @Override public String toString()
   {
      return IntStream.of(m_version).mapToObj(Integer::toString).collect(Collectors.joining("."));
   }

   private final int[] m_version;
}