org.semanticweb.owlapi.normalform.OWLObjectComplementOfExtractor Maven / Gradle / Ivy
/* This file is part of the OWL API.
* The contents of this file are subject to the LGPL License, Version 3.0.
* Copyright 2014, The University of Manchester
*
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
*
* Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0 in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */
package org.semanticweb.owlapi.normalform;
import java.util.HashSet;
import java.util.Set;
import javax.annotation.Nonnull;
import org.semanticweb.owlapi.model.OWLClassExpression;
import org.semanticweb.owlapi.model.OWLObjectAllValuesFrom;
import org.semanticweb.owlapi.model.OWLObjectComplementOf;
import org.semanticweb.owlapi.model.OWLObjectExactCardinality;
import org.semanticweb.owlapi.model.OWLObjectIntersectionOf;
import org.semanticweb.owlapi.model.OWLObjectMaxCardinality;
import org.semanticweb.owlapi.model.OWLObjectMinCardinality;
import org.semanticweb.owlapi.model.OWLObjectSomeValuesFrom;
import org.semanticweb.owlapi.model.OWLObjectUnionOf;
import org.semanticweb.owlapi.util.OWLClassExpressionVisitorAdapter;
/**
* Extracts the parts of a class expression which are negated. For example, A
* and not (B or C or not D) would extract {(B or C or notD), D}
*
* @author Matthew Horridge, The University Of Manchester, Bio-Health
* Informatics Group
* @since 2.2.0
*/
public class OWLObjectComplementOfExtractor extends
OWLClassExpressionVisitorAdapter {
private final Set result = new HashSet<>();
/**
* Gets the complemented class expressions.
*
* @param desc
* the class to look for
* @return the complemented expressions
*/
@Nonnull
public Set getComplementedClassExpressions(
@Nonnull OWLClassExpression desc) {
// XXX a stateless visitor would not need copies
reset();
desc.accept(this);
return new HashSet<>(result);
}
/** clear the visitor. */
public void reset() {
result.clear();
}
@Override
public void visit(OWLObjectAllValuesFrom ce) {
ce.getFiller().accept(this);
}
@Override
public void visit(OWLObjectComplementOf ce) {
result.add(ce.getOperand());
ce.getOperand().accept(this);
}
@Override
public void visit(OWLObjectExactCardinality ce) {
ce.getFiller().accept(this);
}
@Override
public void visit(OWLObjectIntersectionOf ce) {
for (OWLClassExpression op : ce.getOperands()) {
op.accept(this);
}
}
@Override
public void visit(OWLObjectMaxCardinality ce) {
ce.getFiller().accept(this);
}
@Override
public void visit(OWLObjectMinCardinality ce) {
ce.getFiller().accept(this);
}
@Override
public void visit(OWLObjectSomeValuesFrom ce) {
ce.getFiller().accept(this);
}
@Override
public void visit(OWLObjectUnionOf ce) {
for (OWLClassExpression op : ce.getOperands()) {
op.accept(this);
}
}
}