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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.reasoning.interpretation;
import tools.refinery.store.map.Cursor;
import tools.refinery.store.model.ModelStoreBuilder;
import tools.refinery.store.query.ModelQueryAdapter;
import tools.refinery.store.query.ModelQueryBuilder;
import tools.refinery.logic.dnf.Query;
import tools.refinery.store.query.resultset.ResultSet;
import tools.refinery.store.reasoning.ReasoningAdapter;
import tools.refinery.store.reasoning.literal.Concreteness;
import tools.refinery.store.reasoning.representation.PartialSymbol;
import tools.refinery.logic.term.truthvalue.TruthValue;
import tools.refinery.store.tuple.Tuple;
import java.util.Set;
public class QueryBasedRelationInterpretationFactory implements PartialInterpretation.Factory<TruthValue, Boolean> {
private final Query<Boolean> may;
private final Query<Boolean> must;
private final Query<Boolean> candidateMay;
private final Query<Boolean> candidateMust;
public QueryBasedRelationInterpretationFactory(
Query<Boolean> may, Query<Boolean> must, Query<Boolean> candidateMay, Query<Boolean> candidateMust) {
this.may = may;
this.must = must;
this.candidateMay = candidateMay;
this.candidateMust = candidateMust;
}
@Override
public PartialInterpretation<TruthValue, Boolean> create(
ReasoningAdapter adapter, Concreteness concreteness, PartialSymbol<TruthValue, Boolean> partialSymbol) {
var queryEngine = adapter.getModel().getAdapter(ModelQueryAdapter.class);
ResultSet<Boolean> mayResultSet;
ResultSet<Boolean> mustResultSet;
switch (concreteness) {
case PARTIAL -> {
mayResultSet = queryEngine.getResultSet(may);
mustResultSet = queryEngine.getResultSet(must);
}
case CANDIDATE -> {
mayResultSet = queryEngine.getResultSet(candidateMay);
mustResultSet = queryEngine.getResultSet(candidateMust);
}
default -> throw new IllegalArgumentException("Unknown concreteness: " + concreteness);
}
if (mayResultSet.equals(mustResultSet)) {
return new TwoValuedInterpretation(adapter, concreteness, partialSymbol, mustResultSet);
} else {
return new FourValuedInterpretation(
adapter, concreteness, partialSymbol, mayResultSet, mustResultSet);
}
}
@Override
public void configure(ModelStoreBuilder storeBuilder, Set<Concreteness> requiredInterpretations) {
var queryBuilder = storeBuilder.getAdapter(ModelQueryBuilder.class);
if (requiredInterpretations.contains(Concreteness.PARTIAL)) {
queryBuilder.queries(may, must);
}
if (requiredInterpretations.contains(Concreteness.CANDIDATE)) {
queryBuilder.queries(candidateMay, candidateMust);
}
}
private static class TwoValuedInterpretation extends AbstractPartialInterpretation<TruthValue, Boolean> {
private final ResultSet<Boolean> resultSet;
protected TwoValuedInterpretation(
ReasoningAdapter adapter, Concreteness concreteness, PartialSymbol<TruthValue, Boolean> partialSymbol,
ResultSet<Boolean> resultSet) {
super(adapter, concreteness, partialSymbol);
this.resultSet = resultSet;
}
@Override
public TruthValue get(Tuple key) {
return TruthValue.toTruthValue(resultSet.get(key));
}
@Override
public Cursor<Tuple, TruthValue> getAll() {
return new TwoValuedCursor(resultSet.getAll());
}
private record TwoValuedCursor(Cursor<Tuple, Boolean> cursor) implements Cursor<Tuple, TruthValue> {
@Override
public Tuple getKey() {
return cursor.getKey();
}
@Override
public TruthValue getValue() {
return TruthValue.toTruthValue(cursor.getValue());
}
@Override
public boolean isTerminated() {
return cursor.isTerminated();
}
@Override
public boolean move() {
return cursor.move();
}
}
}
private static class FourValuedInterpretation extends AbstractPartialInterpretation<TruthValue, Boolean> {
private final ResultSet<Boolean> mayResultSet;
private final ResultSet<Boolean> mustResultSet;
public FourValuedInterpretation(
ReasoningAdapter adapter, Concreteness concreteness, PartialSymbol<TruthValue, Boolean> partialSymbol,
ResultSet<Boolean> mayResultSet, ResultSet<Boolean> mustResultSet) {
super(adapter, concreteness, partialSymbol);
this.mayResultSet = mayResultSet;
this.mustResultSet = mustResultSet;
}
@Override
public TruthValue get(Tuple key) {
boolean isMay = mayResultSet.get(key);
boolean isMust = mustResultSet.get(key);
if (isMust) {
return isMay ? TruthValue.TRUE : TruthValue.ERROR;
} else {
return isMay ? TruthValue.UNKNOWN : TruthValue.FALSE;
}
}
@Override
public Cursor<Tuple, TruthValue> getAll() {
return new FourValuedCursor();
}
private final class FourValuedCursor implements Cursor<Tuple, TruthValue> {
private final Cursor<Tuple, Boolean> mayCursor;
private Cursor<Tuple, Boolean> mustCursor;
private FourValuedCursor() {
this.mayCursor = mayResultSet.getAll();
}
@Override
public Tuple getKey() {
return mustCursor == null ? mayCursor.getKey() : mustCursor.getKey();
}
@Override
public TruthValue getValue() {
if (mustCursor != null) {
return TruthValue.ERROR;
}
if (Boolean.TRUE.equals(mustResultSet.get(mayCursor.getKey()))) {
return TruthValue.TRUE;
}
return TruthValue.UNKNOWN;
}
@Override
public boolean isTerminated() {
return mustCursor != null && mustCursor.isTerminated();
}
@Override
public boolean move() {
if (mayCursor.isTerminated()) {
return moveMust();
}
if (mayCursor.move()) {
return true;
}
mustCursor = mustResultSet.getAll();
return moveMust();
}
private boolean moveMust() {
while (mustCursor.move()) {
// We already iterated over {@code TRUE} truth values with {@code mayCursor}.
if (!Boolean.TRUE.equals(mayResultSet.get(mustCursor.getKey()))) {
return true;
}
}
return false;
}
}
}
}
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