org.semanticweb.owlapi.model.IsAnonymous Maven / Gradle / Ivy
package org.semanticweb.owlapi.model;
/**
* Anonymous or named object interface. Named {@code OWLObject} instances have an IRI; this includes
* {@code OWLClass}, {@code OWLDataProperty}, {@code OWLObjectProperty}, {@code OWLDatatype},
* {@code OWLAnnotationProperty} and {@code OWLNamedIndividual} instances. {@code OWLOntology}
* instances also have an IRI or can be anonymous, depending on the contents of their ontology id.
* Ontologies are mutable and therefore can switch from anonymous to named, when their id is
* changed; all other objects are immutable, and therefore will not change from anonymous to named.
*/
public interface IsAnonymous {
/**
* @return {@code true} if this object is anonymous, {@code false} otherwise. For example, class
* expressions are anonymous while class entities are not (they have an IRI);
* {@code OWLNamedIndividual} instances are named, {@code OWLAnonymousIndividual}
* instances are anonymous. An ontology is anonymous if it does not have an ontology
* IRI. In this case, getOntologyID().getOntologyIRI() will return an empty optional.
*/
default boolean isAnonymous() {
return true;
}
/**
* @return {@code true} if this object is named, {@code false} otherwise. For example, class
* entities are named (they have an IRI) while class expressions are anonymous;
* {@code OWLNamedIndividual} instances are named, {@code OWLAnonymousIndividual}
* instances are anonymous.
*/
default boolean isNamed() {
return !isAnonymous();
}
}