de.dfki.mycbr.core.similarity
Class SpecialFct

java.lang.Object
  java.util.Observable
      de.dfki.mycbr.core.similarity.SymbolFct
          de.dfki.mycbr.core.similarity.SpecialFct

All Implemented Interfaces:

ISimFct, java.util.Observer

public class SpecialFct
extends SymbolFct

Special values such as "undefined" can be used as values for any attribute description. This class defines how to compute the similarity of two special values. They are basically treated like symbol attributes.

Author:

myCBR Team

Constructor Summary

SpecialFct(Project prj, SpecialDesc desc, java.lang.String name)

Method Summary

Similarity

calculateSimilarity(SpecialAttribute att1, SpecialAttribute att2) Returns the similarity of the given attributes.

Methods inherited from class de.dfki.mycbr.core.similarity.SymbolFct

calculateSimilarity, calculateSimilarity, clone, getDesc, getMultipleConfig, getName, getProject, isSymmetric, setMultipleConfig, setName, setSimilarity, setSimilarity, setSimilarity, setSimilarity, setSymmetric, update

Methods inherited from class java.util.Observable

addObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SpecialFct

public SpecialFct(Project prj,
                  SpecialDesc desc,
                  java.lang.String name)

Parameters:

prj -

desc -

name -

Method Detail

calculateSimilarity

public Similarity calculateSimilarity(SpecialAttribute att1,
                                      SpecialAttribute att2)

Returns the similarity of the given attributes. Returns null if the attributes do not have the same description, if they are not of type SymbolAttribute or SpecialValueAttribute, or if there is something wrong with the index structure provided by the given range.

Parameters:

att1 - first attribute

att2 - second attribute

Returns:

similarity of the given attributes, invalid similarity if an error occurs

Throws:

java.lang.Exception