/* Copyright 2008, 2009, 2010 by the Oxford University Computing Laboratory
This file is part of HermiT.
HermiT is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HermiT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with HermiT. If not, see <http://www.gnu.org/licenses/>.
*/
package org.semanticweb.HermiT.hierarchy;
import java.util.Map;
import java.util.Set;
import org.semanticweb.HermiT.model.AtomicConcept;
import org.semanticweb.HermiT.model.AtomicRole;
import org.semanticweb.HermiT.model.DLClause;
import org.semanticweb.HermiT.model.DLPredicate;
import org.semanticweb.HermiT.model.Role;
import org.semanticweb.HermiT.tableau.ReasoningTaskDescription;
import org.semanticweb.HermiT.tableau.Tableau;
public class QuasiOrderClassificationForRoles extends QuasiOrderClassification {
protected final boolean m_hasInverses;
protected final Map<Role,AtomicConcept> m_conceptsForRoles;
protected final Map<AtomicConcept,Role> m_rolesForConcepts;
public QuasiOrderClassificationForRoles(Tableau tableau,ClassificationProgressMonitor progressMonitor,AtomicConcept topElement,AtomicConcept bottomElement,Set<AtomicConcept> elements,boolean hasInverses,Map<Role,AtomicConcept> conceptsForRoles,Map<AtomicConcept,Role> rolesForConcepts) {
super(tableau,progressMonitor,topElement,bottomElement,elements);
m_hasInverses=hasInverses;
m_conceptsForRoles=conceptsForRoles;
m_rolesForConcepts=rolesForConcepts;
}
protected void initialiseKnownSubsumptionsUsingToldSubsumers(Set<DLClause> dlClauses) {
for (DLClause dlClause : dlClauses) {
if (dlClause.getHeadLength()==1 && dlClause.getBodyLength()==1) {
DLPredicate headPredicate=dlClause.getHeadAtom(0).getDLPredicate();
DLPredicate bodyPredicate=dlClause.getBodyAtom(0).getDLPredicate();
if (headPredicate instanceof AtomicRole && m_conceptsForRoles.containsKey(headPredicate) && bodyPredicate instanceof AtomicRole && m_conceptsForRoles.containsKey(bodyPredicate)) {
AtomicRole headRole=(AtomicRole)headPredicate;
AtomicRole bodyRole=(AtomicRole)bodyPredicate;
AtomicConcept conceptForHeadRole=m_conceptsForRoles.get(headRole);
AtomicConcept conceptForBodyRole=m_conceptsForRoles.get(bodyRole);
assert conceptForBodyRole!=null;
assert conceptForHeadRole!=null;
if (dlClause.getBodyAtom(0).getArgument(0)!=dlClause.getHeadAtom(0).getArgument(0)) {
// r -> s^- and r^- -> s
AtomicConcept conceptForBodyInvRole=m_conceptsForRoles.get(bodyRole.getInverse());
addKnownSubsumption(conceptForBodyInvRole,conceptForHeadRole);
}
else {
// r-> s and r^- -> s^-
addKnownSubsumption(conceptForBodyRole,conceptForHeadRole);
}
}
}
}
}
protected void addKnownSubsumption(AtomicConcept subConcept,AtomicConcept superConcept) {
super.addKnownSubsumption(subConcept,superConcept);
if (m_hasInverses) {
AtomicConcept subConceptForInverse=m_conceptsForRoles.get((m_rolesForConcepts.get(subConcept)).getInverse());
AtomicConcept superConceptForInverse=m_conceptsForRoles.get((m_rolesForConcepts.get(superConcept)).getInverse());
super.addKnownSubsumption(subConceptForInverse,superConceptForInverse);
}
}
protected void addPossibleSubsumption(AtomicConcept subConcept,AtomicConcept superConcept) {
super.addPossibleSubsumption(subConcept,superConcept);
if (m_hasInverses) {
AtomicConcept subConceptForInverse=m_conceptsForRoles.get((m_rolesForConcepts.get(subConcept)).getInverse());
AtomicConcept superConceptForInverse=m_conceptsForRoles.get((m_rolesForConcepts.get(superConcept)).getInverse());
super.addPossibleSubsumption(subConceptForInverse,superConceptForInverse);
}
}
protected ReasoningTaskDescription getSatTestDescription(AtomicConcept atomicConcept) {
return ReasoningTaskDescription.isRoleSatisfiable(m_rolesForConcepts.get(atomicConcept),true);
}
protected ReasoningTaskDescription getSubsumptionTestDescription(AtomicConcept subConcept,AtomicConcept superConcept) {
return ReasoningTaskDescription.isRoleSubsumedBy(m_rolesForConcepts.get(subConcept),m_rolesForConcepts.get(superConcept),true);
}
protected ReasoningTaskDescription getSubsumedByListTestDescription(AtomicConcept subConcept,Object[] superconcepts) {
Object[] roles=new Object[superconcepts.length];
for (int i=0;i<roles.length;i++) {
assert superconcepts[i] instanceof AtomicConcept;
roles[i]=m_rolesForConcepts.get(superconcepts[i]);
}
return ReasoningTaskDescription.isRoleSubsumedByList(m_rolesForConcepts.get(subConcept),roles,true);
}
}