uk.ac.manchester.cs.factplusplusad.TopEquivalenceEvaluator Maven / Gradle / Ivy
package uk.ac.manchester.cs.factplusplusad;
import org.semanticweb.owlapi.model.OWLClass;
import org.semanticweb.owlapi.model.OWLDataAllValuesFrom;
import org.semanticweb.owlapi.model.OWLDataComplementOf;
import org.semanticweb.owlapi.model.OWLDataExactCardinality;
import org.semanticweb.owlapi.model.OWLDataHasValue;
import org.semanticweb.owlapi.model.OWLDataIntersectionOf;
import org.semanticweb.owlapi.model.OWLDataMaxCardinality;
import org.semanticweb.owlapi.model.OWLDataMinCardinality;
import org.semanticweb.owlapi.model.OWLDataOneOf;
import org.semanticweb.owlapi.model.OWLDataProperty;
import org.semanticweb.owlapi.model.OWLDataRange;
import org.semanticweb.owlapi.model.OWLDataSomeValuesFrom;
import org.semanticweb.owlapi.model.OWLDataUnionOf;
import org.semanticweb.owlapi.model.OWLDatatype;
import org.semanticweb.owlapi.model.OWLDatatypeRestriction;
import org.semanticweb.owlapi.model.OWLLiteral;
import org.semanticweb.owlapi.model.OWLObject;
import org.semanticweb.owlapi.model.OWLObjectAllValuesFrom;
import org.semanticweb.owlapi.model.OWLObjectComplementOf;
import org.semanticweb.owlapi.model.OWLObjectExactCardinality;
import org.semanticweb.owlapi.model.OWLObjectHasSelf;
import org.semanticweb.owlapi.model.OWLObjectHasValue;
import org.semanticweb.owlapi.model.OWLObjectIntersectionOf;
import org.semanticweb.owlapi.model.OWLObjectInverseOf;
import org.semanticweb.owlapi.model.OWLObjectMaxCardinality;
import org.semanticweb.owlapi.model.OWLObjectMinCardinality;
import org.semanticweb.owlapi.model.OWLObjectOneOf;
import org.semanticweb.owlapi.model.OWLObjectProperty;
import org.semanticweb.owlapi.model.OWLObjectPropertyExpression;
import org.semanticweb.owlapi.model.OWLObjectSomeValuesFrom;
import org.semanticweb.owlapi.model.OWLObjectUnionOf;
import org.semanticweb.owlapi.model.OWLObjectVisitor;
import org.semanticweb.owlapi.model.OWLPropertyExpression;
import org.semanticweb.owlapi.model.OWLPropertyRange;
import org.semanticweb.owlapi.model.OWLSubPropertyChainOfAxiom;
import org.semanticweb.owlapi.vocab.OWL2Datatype;
/**
* check whether class expressions are equivalent to top wrt given locality
* class
*/
class TopEquivalenceEvaluator extends SigAccessor implements OWLObjectVisitor {
/**
* corresponding bottom evaluator
*/
BotEquivalenceEvaluator botEval;
/**
* keep the value here
*/
boolean isTopEq = false;
/**
* init c'tor
*
* @param s signature
*/
@SuppressWarnings("null")
TopEquivalenceEvaluator(Signature s) {
super(s);
}
boolean isBotEquivalent(OWLObject expr) {
return botEval.isBotEquivalent(expr);
}
// non-empty Concept/Data expression
/**
* @param c C
* @return true iff C^I is non-empty
*/
private boolean isBotDistinct(OWLObject c) {
// TOP is non-empty
if (isTopEquivalent(c)) {
return true;
}
// built-in DT are non-empty
// FIXME!! that's it for now
return c instanceof OWLDatatype;
}
// cardinality of a concept/data expression interpretation
/**
* @param c C
* @param n cardinality
* @return true if #C^I > n
*/
private boolean isCardLargerThan(OWLObject c, int n) {
if (n == 0) {
return isBotDistinct(c);
}
// data top is infinite
if (c instanceof OWLDataRange && isTopEquivalent(c)) {
return true;
}
if (c instanceof OWLDatatype) {
// string/time are infinite DT
OWLDatatype dt = ((OWLDatatype) c).asOWLDatatype();
if (OWL2Datatype.XSD_STRING.matches(dt) || OWL2Datatype.XSD_DATE_TIME.matches(dt)
|| OWL2Datatype.XSD_DATE_TIME_STAMP.matches(dt)) {
return true;
}
}
// FIXME!! try to be more precise
return false;
}
/**
* @param n cardinality
* @param r role
* @param c filler
* @return true iff (>= n R.C) is topEq
*/
private boolean isMinTopEquivalent(int n, OWLPropertyExpression r, OWLPropertyRange c) {
return n == 0 || isTopEquivalent(r) && isCardLargerThan(c, n - 1);
}
/**
* @param n cardinality
* @param r role
* @param c filler
* @return true iff (<= n R.C) is topEq
*/
private boolean isMaxTopEquivalent(@SuppressWarnings("unused") int n, OWLPropertyExpression r,
OWLPropertyRange c) {
return isBotEquivalent(r) || isBotEquivalent(c);
}
void setBotEval(BotEquivalenceEvaluator eval) {
botEval = eval;
}
/**
* @param expr expression to check
* @return true iff an EXPRession is equivalent to top wrt defined policy
*/
public boolean isTopEquivalent(OWLObject expr) {
// XXX check
if (expr.isTopEntity()) {
return true;
}
if (expr.isBottomEntity()) {
return false;
}
expr.accept(this);
return isTopEq;
}
@Override
public void visit(OWLClass expr) {
// XXX check
isTopEq = topCLocal() && nc(expr);
}
@Override
public void visit(OWLObjectComplementOf expr) {
isTopEq = isBotEquivalent(expr.getOperand());
}
@Override
public void visit(OWLObjectIntersectionOf expr) {
isTopEq = !expr.operands().anyMatch(p -> !isTopEquivalent(p));
}
@Override
public void visit(OWLObjectUnionOf expr) {
isTopEq = expr.operands().anyMatch(this::isTopEquivalent);
}
@Override
public void visit(OWLObjectOneOf expr) {
isTopEq = false;
}
@Override
public void visit(OWLObjectHasSelf expr) {
isTopEq = isTopEquivalent(expr.getProperty());
}
@Override
public void visit(OWLObjectHasValue expr) {
isTopEq = isTopEquivalent(expr.getProperty());
}
@Override
public void visit(OWLObjectSomeValuesFrom expr) {
isTopEq = isMinTopEquivalent(1, expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLObjectAllValuesFrom expr) {
isTopEq = isTopEquivalent(expr.getFiller()) || isBotEquivalent(expr.getProperty());
}
@Override
public void visit(OWLObjectMinCardinality expr) {
isTopEq = isMinTopEquivalent(expr.getCardinality(), expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLObjectMaxCardinality expr) {
isTopEq = isMaxTopEquivalent(expr.getCardinality(), expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLObjectExactCardinality expr) {
int n = expr.getCardinality();
isTopEq =
isMinTopEquivalent(n, expr.getProperty(), expr.getFiller()) && isMaxTopEquivalent(n,
expr
.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLDataHasValue expr) {
isTopEq = isTopEquivalent(expr.getProperty());
}
@Override
public void visit(OWLDataSomeValuesFrom expr) {
isTopEq = isMinTopEquivalent(1, expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLDataAllValuesFrom expr) {
isTopEq = isTopEquivalent(expr.getFiller()) || isBotEquivalent(expr.getProperty());
}
@Override
public void visit(OWLDataMinCardinality expr) {
isTopEq = isMinTopEquivalent(expr.getCardinality(), expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLDataMaxCardinality expr) {
isTopEq = isMaxTopEquivalent(expr.getCardinality(), expr.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLDataExactCardinality expr) {
int n = expr.getCardinality();
isTopEq =
isMinTopEquivalent(n, expr.getProperty(), expr.getFiller()) && isMaxTopEquivalent(n,
expr
.getProperty(), expr.getFiller());
}
@Override
public void visit(OWLObjectProperty expr) {
// XXX check
isTopEq = topRLocal() && nc(expr);
}
@Override
public void visit(OWLObjectInverseOf expr) {
isTopEq = isTopEquivalent(expr.getInverse());
}
@Override
public void visit(OWLSubPropertyChainOfAxiom expr) {
isTopEq = false;
for (OWLObjectPropertyExpression p : expr.getPropertyChain()) {
if (!isTopEquivalent(p)) {
return;
}
}
isTopEq = true;
}
// data role expressions
@Override
public void visit(OWLDataProperty expr) {
// XXX check
isTopEq = topRLocal() && nc(expr);
}
@Override
public void visit(OWLDatatype node) {
isTopEq = node.isTopDatatype();
}
@Override
public void visit(OWLLiteral node) {
isTopEq = false;
}
@Override
public void visit(OWLDataComplementOf node) {
isTopEq = isBotEquivalent(node.getDataRange());
}
@Override
public void visit(OWLDatatypeRestriction node) {
isTopEq = node.isTopDatatype();
}
@Override
public void visit(OWLDataOneOf node) {
isTopEq = false;
}
@Override
public void visit(OWLDataIntersectionOf expr) {
isTopEq = expr.operands().anyMatch(p -> !isTopEquivalent(p));
}
@Override
public void visit(OWLDataUnionOf expr) {
isTopEq = expr.operands().anyMatch(this::isTopEquivalent);
}
}