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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.dse.transition.objectives;
import tools.refinery.logic.dnf.RelationalQuery;
import tools.refinery.logic.literal.Reduction;
import tools.refinery.store.model.Model;
import tools.refinery.store.model.ModelStore;
import tools.refinery.store.model.ModelStoreBuilder;
import tools.refinery.store.query.ModelQueryAdapter;
import tools.refinery.store.query.ModelQueryBuilder;
import tools.refinery.store.query.ModelQueryStoreAdapter;
public class CountObjective implements Objective {
private final RelationalQuery query;
private final double weight;
public CountObjective(RelationalQuery query) {
this(query, 1);
}
public CountObjective(RelationalQuery query, double weight) {
this.query = query;
this.weight = weight;
}
@Override
public boolean isAlwaysZero(ModelStore store) {
var queryStore = store.getAdapter(ModelQueryStoreAdapter.class);
var canonicalQuery = queryStore.getCanonicalQuery(query);
return canonicalQuery.getDnf().getReduction() == Reduction.ALWAYS_FALSE;
}
@Override
public ObjectiveCalculator createCalculator(Model model) {
var resultSet = model.getAdapter(ModelQueryAdapter.class).getResultSet(query);
return () -> resultSet.size() * weight;
}
@Override
public void configure(ModelStoreBuilder storeBuilder) {
storeBuilder.getAdapter(ModelQueryBuilder.class).query(query);
}
}
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