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/* 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.model;
import static org.semanticweb.owlapi.util.OWLAPIStreamUtils.asList;
import static org.semanticweb.owlapi.util.OWLAPIStreamUtils.asSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Stream;
/**
* Represent a rule. A rule consists of a head and a body. Both the head and the body consist of a
* conjunction of atoms.
*
* @author Matthew Horridge, The University Of Manchester, Medical Informatics Group
* @since 2.0.0
*/
public interface SWRLRule extends OWLLogicalAxiom, SWRLObject {
@Override
default Stream components() {
return Stream.of(bodyList(), headList(), annotationsAsList());
}
@Override
default int initHashCode() {
int hash = hashIndex();
// head and body have an order that cannot be changed but it must not affect equals() and
// hashCode()
hash = OWLObject.hashIteration(hash, body().mapToInt(Object::hashCode).sum());
hash = OWLObject.hashIteration(hash, head().mapToInt(Object::hashCode).sum());
return OWLObject.hashIteration(hash, annotationsAsList().hashCode());
}
@Override
default Stream componentsWithoutAnnotations() {
return Stream.of(bodyList(), headList());
}
@Override
default Stream componentsAnnotationsFirst() {
return Stream.of(annotationsAsList(), bodyList(), headList());
}
@Override
default int hashIndex() {
return 631;
}
/**
* Gets the atoms in the body of the rule.
*
* @return A set of {@code SWRLAtom}s, which represent the atoms in the body of the rule.
* @deprecated use {@link #body()}
*/
@Deprecated
default Set getBody() {
return asSet(body());
}
/** @return body as list */
default List bodyList() {
return asList(body());
}
/** @return head as list */
default List headList() {
return asList(head());
}
/**
* Gets the atoms in the body of the rule.
*
* @return A set of {@code SWRLAtom}s, which represent the atoms in the body of the rule.
*/
Stream body();
/**
* Gets the atoms in the head of the rule.
*
* @return A set of {@code SWRLAtom}s, which represent the atoms in the head of the rule
* @deprecated use {@link #head()}
*/
@Deprecated
default Set getHead() {
return asSet(head());
}
/**
* Gets the atoms in the head of the rule.
*
* @return A set of {@code SWRLAtom}s, which represent the atoms in the head of the rule
*/
Stream head();
/**
* If this rule contains atoms that have predicates that are inverse object properties, then
* this method creates and returns a rule where the arguments of these atoms are fliped over and
* the predicate is the inverse (simplified) property.
*
* @return The rule such that any atoms of the form inverseOf(p)(x, y) are transformed to p(x,
* y).
*/
SWRLRule getSimplified();
/**
* Gets the variables that appear in this rule.
*
* @return A set of variables.
* @deprecated use {@link #variables()}
*/
@Deprecated
default Set getVariables() {
return asSet(variables());
}
/**
* Gets the variables that appear in this rule.
*
* @return A set of variables.
*/
Stream variables();
/**
* Determines if this rule uses anonymous class expressions in class atoms.
*
* @return {@code true} if this rule contains anonymous class expression in class atoms,
* otherwise {@code false}.
*/
boolean containsAnonymousClassExpressions();
/**
* Gets the predicates of class atoms.
*
* @return A set of class expressions that represent the class class expressions that are
* predicates of class atoms.
* @deprecated use {@link #classAtomPredicates()}
*/
@Deprecated
default Set getClassAtomPredicates() {
return asSet(classAtomPredicates());
}
/**
* Gets the predicates of class atoms.
*
* @return A set of class expressions that represent the class class expressions that are
* predicates of class atoms.
*/
Stream classAtomPredicates();
@Override
@SuppressWarnings("unchecked")
SWRLRule getAxiomWithoutAnnotations();
@Override
default void accept(OWLObjectVisitor visitor) {
visitor.visit(this);
}
@Override
default O accept(OWLObjectVisitorEx visitor) {
return visitor.visit(this);
}
@Override
default void accept(SWRLObjectVisitor visitor) {
visitor.visit(this);
}
@Override
default O accept(SWRLObjectVisitorEx visitor) {
return visitor.visit(this);
}
@Override
default void accept(OWLAxiomVisitor visitor) {
visitor.visit(this);
}
@Override
default O accept(OWLAxiomVisitorEx visitor) {
return visitor.visit(this);
}
@Override
default AxiomType getAxiomType() {
return AxiomType.SWRL_RULE;
}
}
