org.semanticweb.owlapi.reasoner.IndividualNodeSetPolicy 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.reasoner;
import java.util.stream.Stream;
import org.semanticweb.owlapi.model.OWLNamedIndividual;
/**
* The policy of how a reasoner will return {@code NodeSet}s of individuals for queries that return
* node sets of named individuals such as
* {@link org.semanticweb.owlapi.reasoner.OWLReasoner#getTypes(org.semanticweb.owlapi.model.OWLNamedIndividual, boolean)}
* or
* {@link org.semanticweb.owlapi.reasoner.OWLReasoner#getInstances(org.semanticweb.owlapi.model.OWLClassExpression, boolean)}
* .
*
* @author Matthew Horridge, The University of Manchester, Information Management Group
* @since 3.0.0
*/
public enum IndividualNodeSetPolicy {
/**
* Indicates that {@code NodeSet}s of named individuals returned by the reasoner will contain
* {@code Node}s that group individuals which are entailed to be the same as each other. For
* example, if {@code i}, {@code j} and {@code k} are individuals, and they are instances of
* {@code C}, and {@code i} is entailed to be the same as {@code j} then asking for the
* instances of {@code A} will return a {@code NodeSet} containing two {@code Node}s, one
* containing {@code i} and {@code j} and the other containing {@code k}.
*/
BY_SAME_AS {
@Override
public Stream filter(NodeSet nodes) {
return nodes.nodes().map(Node::getRepresentativeElement);
}
},
/**
* Indicates that {@code NodeSet}s of named individuals will always contain singleton
* {@code Node}s and individuals that are the same as each other will not be grouped together in
* one {@code Node} within the {@code NodeSet}.For example, if {@code i}, {@code j} and
* {@code k} are individuals, and they are instances of {@code C}, and {@code i} is entailed to
* be the same as {@code j} then asking for the instances of {@code A} will return a
* {@code NodeSet} containing three {@code Node}s, one containing {@code i}, one
* containing {@code j} and the third containing {@code k}.
*/
BY_NAME {
@Override
public Stream filter(NodeSet nodes) {
return nodes.entities();
}
};
/**
* @param nodes node set to filter
* @return filtered individual stream
*/
public abstract Stream filter(NodeSet nodes);
}