src/main/java/jp/sourceforge/stigmata/ComparisonPairElement.java

   1 package jp.sourceforge.stigmata;
   2
   3 /*
   4  * $Id$
   5  */
   6
   7 /**
   8  * This class represents comparing two birthmarks.
   9  * @author  Haruaki TAMADA
  10  * @version  $Revision$
  11  */
  12 public class ComparisonPairElement{
  13     private Birthmark birthmark1;
  14     private Birthmark birthmark2;
  15     private BirthmarkComparator comparator;
  16     private double similarity;
  17     private int compareCount = -1;
  18
  19     public ComparisonPairElement(Birthmark birthmark1, Birthmark birthmark2,
  20             BirthmarkComparator comparator){
  21         this.birthmark1 = birthmark1;
  22         this.birthmark2 = birthmark2;
  23         this.comparator = comparator;
  24
  25         if(!birthmark1.getType().equals(birthmark2.getType())){
  26             throw new IllegalArgumentException("birthmark type mismatch");
  27         }
  28         // cached
  29         similarity = comparator.compare(birthmark1, birthmark2);
  30     }
  31
  32     public synchronized int getComparisonCount(){
  33         // cached
  34         if(compareCount < 0){
  35             compareCount = comparator.getCompareCount(birthmark1, birthmark2);
  36         }
  37         return compareCount;
  38     }
  39
  40     /**
  41      * returns a type of birthmarks.
  42      */
  43     public String getType(){
  44         return birthmark1.getType();
  45     }
  46
  47     /**
  48      * returns similarity between two birthmarks.
  49      */
  50     public double getSimilarity(){
  51         return similarity;
  52     }
  53 }