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/*
* SPDX-FileCopyrightText: 2023-2024 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.reasoning.translator.crossreference;
import tools.refinery.logic.dnf.Query;
import tools.refinery.logic.dnf.QueryBuilder;
import tools.refinery.logic.dnf.RelationalQuery;
import tools.refinery.logic.literal.Literal;
import tools.refinery.logic.term.NodeVariable;
import tools.refinery.logic.term.Variable;
import tools.refinery.logic.term.uppercardinality.FiniteUpperCardinality;
import tools.refinery.store.reasoning.literal.CountCandidateLowerBoundLiteral;
import tools.refinery.store.reasoning.literal.CountLowerBoundLiteral;
import tools.refinery.store.reasoning.representation.PartialRelation;
import tools.refinery.store.reasoning.translator.multiplicity.Multiplicity;
import java.util.ArrayList;
import java.util.List;
import static tools.refinery.logic.literal.Literals.check;
import static tools.refinery.logic.term.int_.IntTerms.constant;
import static tools.refinery.logic.term.int_.IntTerms.less;
import static tools.refinery.store.reasoning.literal.PartialLiterals.candidateMay;
import static tools.refinery.store.reasoning.literal.PartialLiterals.may;
class CrossReferenceUtils {
private CrossReferenceUtils() {
throw new IllegalStateException("This is a static utility class and should not be instantiated directly");
}
public static RelationalQuery createMayHelper(PartialRelation linkType, PartialRelation type,
Multiplicity multiplicity, boolean inverse) {
var preparedBuilder = prepareBuilder(linkType, inverse);
var literals = new ArrayList<Literal>();
literals.add(may(type.call(preparedBuilder.variable())));
if (multiplicity.multiplicity().upperBound() instanceof FiniteUpperCardinality(var finiteUpperBound)) {
var existingLinks = Variable.of("existingLinks", Integer.class);
literals.add(new CountLowerBoundLiteral(existingLinks, linkType, preparedBuilder.arguments()));
literals.add(check(less(existingLinks, constant(finiteUpperBound))));
}
return preparedBuilder.builder().clause(literals).build();
}
public static RelationalQuery createCandidateMayHelper(PartialRelation linkType, PartialRelation type,
Multiplicity multiplicity, boolean inverse) {
var preparedBuilder = prepareBuilder(linkType, inverse);
var literals = new ArrayList<Literal>();
literals.add(candidateMay(type.call(preparedBuilder.variable())));
if (multiplicity.multiplicity().upperBound() instanceof FiniteUpperCardinality(var finiteUpperBound)) {
var existingLinks = Variable.of("existingLinks", Integer.class);
literals.add(new CountCandidateLowerBoundLiteral(existingLinks, linkType, preparedBuilder.arguments()));
literals.add(check(less(existingLinks, constant(finiteUpperBound))));
}
return preparedBuilder.builder().clause(literals).build();
}
private record PreparedBuilder(QueryBuilder builder, NodeVariable variable, List<Variable> arguments) {
}
private static PreparedBuilder prepareBuilder(PartialRelation linkType, boolean inverse) {
String name;
NodeVariable variable;
List<Variable> arguments;
if (inverse) {
name = "Target";
variable = Variable.of("target");
arguments = List.of(Variable.of("source"), variable);
} else {
name = "Source";
variable = Variable.of("source");
arguments = List.of(variable, Variable.of("target"));
}
var builder = Query.builder(linkType.name() + "#mayNew" + name);
builder.parameter(variable);
return new PreparedBuilder(builder, variable, arguments);
}
}
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