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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.reasoning.translator.multiobject;
import tools.refinery.store.model.Interpretation;
import tools.refinery.store.reasoning.ReasoningAdapter;
import tools.refinery.store.reasoning.refinement.AbstractPartialInterpretationRefiner;
import tools.refinery.store.reasoning.representation.PartialSymbol;
import tools.refinery.store.representation.Symbol;
import tools.refinery.store.representation.TruthValue;
import tools.refinery.store.representation.cardinality.CardinalityInterval;
import tools.refinery.store.representation.cardinality.CardinalityIntervals;
import tools.refinery.store.tuple.Tuple;
public class EqualsRefiner extends AbstractPartialInterpretationRefiner<TruthValue, Boolean> {
private final Interpretation<CardinalityInterval> countInterpretation;
private EqualsRefiner(ReasoningAdapter adapter, PartialSymbol<TruthValue, Boolean> partialSymbol,
Symbol<CardinalityInterval> countSymbol) {
super(adapter, partialSymbol);
countInterpretation = adapter.getModel().getInterpretation(countSymbol);
}
@Override
public boolean merge(Tuple key, TruthValue value) {
if (value == TruthValue.UNKNOWN) {
return true;
}
if (value == TruthValue.ERROR) {
return false;
}
int left = key.get(0);
int right = key.get(1);
boolean isDiagonal = left == right;
if (isDiagonal && value == TruthValue.FALSE) {
return false;
}
if (!isDiagonal) {
return !value.may();
}
if (value != TruthValue.TRUE) {
throw new IllegalArgumentException("Unknown TruthValue: " + value);
}
// {@code isDiagonal} is true, so this could be {@code left} or {@code right}.
var unaryKey = Tuple.of(left);
var currentCount = countInterpretation.get(unaryKey);
if (currentCount == null) {
return false;
}
var newCount = currentCount.meet(CardinalityIntervals.LONE);
if (newCount.isEmpty()) {
return false;
}
countInterpretation.put(unaryKey, newCount);
return true;
}
public static Factory<TruthValue, Boolean> of(Symbol<CardinalityInterval> countSymbol) {
return (adapter, partialSymbol) -> new EqualsRefiner(adapter, partialSymbol, countSymbol);
}
}
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