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

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