src/main/java/org/openecomp/sdc/tosca/parser/api/Version.java

   1 package org.openecomp.sdc.tosca.parser.api;
   2
   3 public class Version implements Comparable<Version> {
   4
   5     private String version;
   6
   7     public final String get() {
   8         return this.version;
   9     }
  10
  11     public Version(String version) {
  12         if(version == null)
  13             throw new IllegalArgumentException("Version can not be null");
  14         if(!version.matches("[0-9]+(\\.[0-9]+)*"))
  15             throw new IllegalArgumentException("Invalid version format");
  16         this.version = version;
  17     }
  18
  19     @Override public int compareTo(Version that) {
  20         if(that == null)
  21             return 1;
  22         String[] thisParts = this.get().split("\\.");
  23         String[] thatParts = that.get().split("\\.");
  24         int length = Math.max(thisParts.length, thatParts.length);
  25         for(int i = 0; i < length; i++) {
  26             int thisPart = i < thisParts.length ?
  27                     Integer.parseInt(thisParts[i]) : 0;
  28             int thatPart = i < thatParts.length ?
  29                     Integer.parseInt(thatParts[i]) : 0;
  30             if(thisPart < thatPart)
  31                 return -1;
  32             if(thisPart > thatPart)
  33                 return 1;
  34         }
  35         return 0;
  36     }
  37
  38     @Override public boolean equals(Object that) {
  39         if(this == that)
  40             return true;
  41         if(that == null)
  42             return false;
  43         if(this.getClass() != that.getClass())
  44             return false;
  45         return this.compareTo((Version) that) == 0;
  46     }
  47
  48 }