org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/service/LttngVersion.java

   1 /**********************************************************************
   2  * Copyright (c) 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation
  11  **********************************************************************/
  12 package org.eclipse.linuxtools.internal.lttng2.control.ui.views.service;
  13
  14 import org.osgi.framework.Version;
  15
  16 /**
  17  * A version implementation with a special compareTo implementation
  18  * to bypass problems of older implementation of org.osgi.framework.Version.
  19  *
  20  * @author Bernd Hufmann
  21  */
  22 public class LttngVersion extends Version {
  23
  24     /**
  25      * Constructor
  26      *
  27      * @param version
  28      *      The version string
  29      */
  30     public LttngVersion(String version) {
  31         super(version);
  32     }
  33
  34     /**
  35      * Special compareTo method to fix problem of older implementations of org.osgi.framework.Version
  36      * where {@code Version.compareTo} takes an {@code Object} instead a {@code Version} as argument.
  37      *
  38      * @param other
  39      *      - Other version to compare
  40      * @return a negative integer, zero, or a positive integer if this version
  41      *         is less than, equal to, or greater than the specified
  42      *         {@code LttngVersion} object.
  43      */
  44     public int compareTo(LttngVersion other) {
  45         if (other == this) { // quicktest
  46             return 0;
  47         }
  48
  49         int result = getMajor() - other.getMajor();
  50         if (result != 0) {
  51             return result;
  52         }
  53
  54         result = getMinor() - other.getMinor();
  55         if (result != 0) {
  56             return result;
  57         }
  58
  59         result = getMicro() - other.getMicro();
  60         if (result != 0) {
  61             return result;
  62         }
  63         return getQualifier().compareTo(other.getQualifier());
  64     }
  65 }