subprojects/store-query-viatra/src/main/java/tools/refinery/store/query/viatra/internal/update/TuplePreservingViewUpdateListener.java


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/*
 * SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package tools.refinery.store.query.viatra.internal.update;

import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
import tools.refinery.store.model.Interpretation;
import tools.refinery.store.query.viatra.internal.ViatraModelQueryAdapterImpl;
import tools.refinery.store.query.view.TuplePreservingView;
import tools.refinery.store.tuple.Tuple;

public class TuplePreservingViewUpdateListener<T> extends SymbolViewUpdateListener<T> {
	private final TuplePreservingView<T> view;

	TuplePreservingViewUpdateListener(ViatraModelQueryAdapterImpl adapter, TuplePreservingView<T> view,
									  Interpretation<T> interpretation) {
        super(adapter, interpretation);
        this.view = view;
	}

	@Override
	public void put(Tuple key, T fromValue, T toValue, boolean restoring) {
		boolean fromPresent = view.filter(key, fromValue);
		boolean toPresent = view.filter(key, toValue);
		if (fromPresent == toPresent) {
			return;
		}
		var translated = Tuples.flatTupleOf(view.forwardMap(key));
		processUpdate(translated, toPresent);
	}
}