protected void loadOntology() {
try {
manager = OWLManager.createOWLOntologyManager();
URI physicalURI = URI.create(PREFERENCES.getOntologyURL());
// Now do the loading
ontology = manager.loadOntologyFromPhysicalURI(physicalURI);
manager.setPhysicalURIForOntology(ontology, physicalURI);
} catch (final Exception e) {
Runnable runnable =
new Runnable() {
public void run() {
JOptionPane.showMessageDialog(
null,
"Could not create the ontology. (This probably happened\n"
+ "because the ontology could not be accessed due to network\n"
+ "problems.)\n"
+ "["
+ e.getMessage()
+ "]",
"Error",
JOptionPane.ERROR_MESSAGE);
System.exit(1);
}
};
SwingUtilities.invokeLater(runnable);
}
}
private OWLDescription createIncludeCoffeeDescription(Set<OWLClass> includeExtras) {
OWLObjectProperty prop =
this.getNamedObjectProperty(PREFERENCES.getExtrasPropertyName()); // has_extras
Set<OWLDescription> classes = new HashSet<OWLDescription>();
classes.add(getCoffeeClass()); // get OWL class for Coffee
for (OWLClass extra : includeExtras) {
classes.add(manager.getOWLDataFactory().getOWLObjectSomeRestriction(prop, extra));
}
return manager.getOWLDataFactory().getOWLObjectIntersectionOf(classes);
}
private OWLDescription createExcludeCoffeeDescription(Set<OWLClass> excludeExtras) {
OWLObjectProperty prop =
this.getNamedObjectProperty(PREFERENCES.getExtrasPropertyName()); // has_extras
Set<OWLDescription> classes = new HashSet<OWLDescription>();
// Everything must be a coffee
for (OWLClass extra : excludeExtras) {
classes.add(manager.getOWLDataFactory().getOWLObjectSomeRestriction(prop, extra));
}
// are looking for.
return manager.getOWLDataFactory().getOWLObjectUnionOf(classes);
}
/**
* Creates OWLDescription (query) by given included extras and excluded extras
*
* @param includeExtras
* @param excludeExtras
* @return
*/
private OWLDescription createCoffeeDescription(
Set<OWLClass> includeExtras, Set<OWLClass> excludeExtras) {
// Include means existential restrictions
// Exclude means negated existential restrictions
OWLObjectProperty prop =
this.getNamedObjectProperty(PREFERENCES.getExtrasPropertyName()); // has_extras
// Create a hash set to store the components (existential restrictions)
// of our description
Set<OWLDescription> classes = new HashSet<OWLDescription>();
// Everything must be a coffee
classes.add(getCoffeeClass()); // get OWL class for Coffee
// Create the existential restrictions that represent the extras
// that we want to include.
for (OWLClass extra : includeExtras) {
// e.g. hasExtras some ex_A , hasExtras some ex_B
classes.add(manager.getOWLDataFactory().getOWLObjectSomeRestriction(prop, extra));
}
// Create the negated existential restrictions of the extras that we
// want to exclude
for (OWLClass excludeExtra : excludeExtras) {
// has_topping some topping_A
OWLDescription restriction =
manager.getOWLDataFactory().getOWLObjectSomeRestriction(prop, excludeExtra);
// not (has_topping some topping_A)
OWLObjectComplementOf neg = manager.getOWLDataFactory().getOWLObjectComplementOf(restriction);
classes.add(neg);
}
// Bind the whole thing up in an intersection class
// to create a concept description of the coffee we
// are looking for.
return manager.getOWLDataFactory().getOWLObjectIntersectionOf(classes);
}
public OWLObjectProperty getTemperatureProperty() {
return getNamedObjectProperty(PREFERENCES.getTemperaturePropertyName());
}
public OWLObjectProperty getExtrasProperty() {
return getNamedObjectProperty(PREFERENCES.getExtrasPropertyName());
}
static {
PREFERENCES = CoffeePreferences.getInstance();
}
public OWLClass getMochaCoffeeClass() {
return this.getNamedClass(PREFERENCES.getMochaCoffeeClassName());
}
public OWLClass getGuaFilterCoffeeClass() {
return this.getNamedClass(PREFERENCES.getGuaFilterCoffeeClassName());
}
public OWLClass getEspressoCoffeeClass() {
return this.getNamedClass(PREFERENCES.getEspressoCoffeeClassName());
}
/**
* Gets the main temperature categories. This actually returns the direct named subclasses of the
* Temperature class.
*
* @return A <code>Collection</code> of <code>OWLNamedClasses</code>
*/
public Collection getTemperatureCategories() throws OWLReasonerException {
OWLClass temperatureCls = this.getNamedClass(PREFERENCES.getTemperatureClassName());
return temperatureCls.getSubClasses(ontology);
}
/**
* Gets the main base categories. This actually returns the direct named subclasses of the Bases
* class.
*
* @return A <code>Collection</code> of <code>OWLNamedClasses</code>
*/
public Collection getCoffeeBasesCategories() throws OWLReasonerException {
OWLClass basesCls = this.getNamedClass(PREFERENCES.getBaseClassName());
return basesCls.getSubClasses(ontology);
}
