Package org.tweetyproject.logics.dl.syntax

Class ConceptAssertion

java.lang.Object

org.tweetyproject.logics.dl.syntax.DlAxiom

org.tweetyproject.logics.dl.syntax.AssertionalAxiom

org.tweetyproject.logics.dl.syntax.ConceptAssertion

All Implemented Interfaces:

Formula, SimpleLogicalFormula

public class ConceptAssertion
extends AssertionalAxiom

This class models a concept assertion in description logic, i.e. an expression of the form "a : C" (a is in the extension of C) where a is an individual and C is a concept.

Author:

Anna Gessler

Constructor Summary

Constructors

Constructor	Description
ConceptAssertion()	Empty default constructor.
ConceptAssertion(Individual i, AtomicConcept c)	Initializes a role assertion with the given atomic concept and Individual.
ConceptAssertion(Individual i, ComplexConcept c)	Initializes a role assertion with the given concept and Individual.

Method Summary

Modifier and Type	Method	Description
ConceptAssertion	clone()	Creates a deep copy of this formula
boolean	equals(Object obj)
ComplexConcept	getConcept()	Returns the concept involved in this concept assertion.
Individual	getIndividual()	Returns the individual involved in this concept assertion.
Set<Predicate>	getPredicates()	Processes the set of all predicates which appear in this formula
DlSignature	getSignature()	Returns the signature of the language of this formula.
int	hashCode()
boolean	isAtomic()	Determines if the concept involved in the assertion is atomic.
String	toString()

Methods inherited from class org.tweetyproject.logics.dl.syntax.DlAxiom

getAtoms, getPredicateCls, isLiteral

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ConceptAssertion

public ConceptAssertion()

Empty default constructor.

ConceptAssertion

public ConceptAssertion(Individual i,
 ComplexConcept c)

Initializes a role assertion with the given concept and Individual.

Parameters:

i - an Individual, term of the concept

c - a (complex) concept

ConceptAssertion

public ConceptAssertion(Individual i,
 AtomicConcept c)

Initializes a role assertion with the given atomic concept and Individual.

Parameters:

i - an Individual, term of the concept

c - AtomicConcept

Method Details

getPredicates

public Set<Predicate> getPredicates()

Description copied from interface: SimpleLogicalFormula

Processes the set of all predicates which appear in this formula

Specified by:

getPredicates in interface SimpleLogicalFormula

Specified by:

getPredicates in class DlAxiom

Returns:

all predicates that appear in this formula

clone

public ConceptAssertion clone()

Description copied from interface: SimpleLogicalFormula

Creates a deep copy of this formula

Specified by:

clone in interface SimpleLogicalFormula

Specified by:

clone in class DlAxiom

Returns:

the cloned formula

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface SimpleLogicalFormula

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface SimpleLogicalFormula

Overrides:

equals in class Object

getSignature

public DlSignature getSignature()

Description copied from interface: Formula

Returns the signature of the language of this formula.

Specified by:

getSignature in interface Formula

Specified by:

getSignature in class DlAxiom

Returns:

the signature of the language of this formula.

getIndividual

public Individual getIndividual()

Returns the individual involved in this concept assertion.

This is the individual that is an instance of the concept in this assertion. For example, in the assertion "a : C", the individual would be "a".

Returns:

the individual of this concept assertion

getConcept

public ComplexConcept getConcept()

Returns the concept involved in this concept assertion.

This is the concept that the individual in this assertion is an instance of. For example, in the assertion "a : C", the concept would be "C".

Returns:

the concept of this concept assertion

isAtomic

public boolean isAtomic()

Description copied from class: AssertionalAxiom

Determines if the concept involved in the assertion is atomic.

Specified by:

isAtomic in class AssertionalAxiom

Returns:

true if the concept of the assertion is atomic, false if it is a complex concept