org.coode.oppl.similarity

Class OWLObjectStructuralPrimeHashingBasedSimilarityMeasure

java.lang.Object

org.coode.oppl.similarity.OWLObjectStructuralPrimeHashingBasedSimilarityMeasure

All Implemented Interfaces:

SimilarityMeasure<org.semanticweb.owlapi.model.OWLObject>

public class OWLObjectStructuralPrimeHashingBasedSimilarityMeasure
extends Object
implements SimilarityMeasure<org.semanticweb.owlapi.model.OWLObject>

This measure is based on an Hashing function that maps each OWLObject into a product of prime numbers. Prime number factorization is unique, hence dividing the hash codes one can easily spot the differences.

Author:

Luigi Iannone

Constructor Summary

Constructors

Constructor and Description
OWLObjectStructuralPrimeHashingBasedSimilarityMeasure()

Method Summary

Modifier and Type	Method and Description
double	compare(org.semanticweb.owlapi.model.OWLObject anObject, org.semanticweb.owlapi.model.OWLObject anotherObject) Compares the two input objects.
HashFunction	getHashFunction()
boolean	isSymmetric()

Methods inherited from class java.lang.Object

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

Constructor Detail

OWLObjectStructuralPrimeHashingBasedSimilarityMeasure

public OWLObjectStructuralPrimeHashingBasedSimilarityMeasure()

Method Detail

compare

public double compare(org.semanticweb.owlapi.model.OWLObject anObject,
                      org.semanticweb.owlapi.model.OWLObject anotherObject)

Description copied from interface: SimilarityMeasure

Compares the two input objects. It required for this interface to implement this method in accordance to the equals method available for O. If isSymmetric returns true, then it must hold that compare(A,B) == compare (B,A).

Specified by:

compare in interface SimilarityMeasure<org.semanticweb.owlapi.model.OWLObject>

Parameters:

anObject - the first object to compare. cannot be null.

anotherObject - the first object to compare. cannot be null.

Returns:

a number between 0 and 1. 1 corresponds to maximum similarity, 0 to minimal

isSymmetric

public boolean isSymmetric()

Specified by:

isSymmetric in interface SimilarityMeasure<org.semanticweb.owlapi.model.OWLObject>

Returns:

true if compare(A,B) == compare (B,A)

getHashFunction

public HashFunction getHashFunction()

Returns:

the hashFunction