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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;
import tools.refinery.store.model.Model;
import tools.refinery.store.model.ModelListener;
import tools.refinery.store.query.dnf.AnyQuery;
import tools.refinery.store.query.dnf.FunctionalQuery;
import tools.refinery.store.query.dnf.Query;
import tools.refinery.store.query.dnf.RelationalQuery;
import tools.refinery.store.query.resultset.AnyResultSet;
import tools.refinery.store.query.resultset.EmptyResultSet;
import tools.refinery.store.query.resultset.ResultSet;
import tools.refinery.store.query.viatra.ViatraModelQueryAdapter;
import tools.refinery.store.query.viatra.internal.matcher.FunctionalViatraMatcher;
import tools.refinery.store.query.viatra.internal.matcher.RawPatternMatcher;
import tools.refinery.store.query.viatra.internal.matcher.RelationalViatraMatcher;
import tools.refinery.viatra.runtime.CancellationToken;
import tools.refinery.viatra.runtime.api.AdvancedViatraQueryEngine;
import tools.refinery.viatra.runtime.api.GenericQueryGroup;
import tools.refinery.viatra.runtime.api.IQuerySpecification;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
public class ViatraModelQueryAdapterImpl implements ViatraModelQueryAdapter, ModelListener {
private final Model model;
private final ViatraModelQueryStoreAdapterImpl storeAdapter;
private final AdvancedViatraQueryEngine queryEngine;
private final Map<AnyQuery, AnyResultSet> resultSets;
private boolean pendingChanges;
ViatraModelQueryAdapterImpl(Model model, ViatraModelQueryStoreAdapterImpl storeAdapter) {
this.model = model;
this.storeAdapter = storeAdapter;
var scope = new RelationalScope(this);
queryEngine = AdvancedViatraQueryEngine.createUnmanagedEngine(scope,
storeAdapter.getEngineOptions());
var querySpecifications = storeAdapter.getQuerySpecifications();
GenericQueryGroup.of(
Collections.<IQuerySpecification<?>>unmodifiableCollection(querySpecifications.values()).stream()
).prepare(queryEngine);
queryEngine.flushChanges();
var vacuousQueries = storeAdapter.getVacuousQueries();
resultSets = new LinkedHashMap<>(querySpecifications.size() + vacuousQueries.size());
for (var entry : querySpecifications.entrySet()) {
var rawPatternMatcher = queryEngine.getMatcher(entry.getValue());
var query = entry.getKey();
resultSets.put(query, createResultSet((Query<?>) query, rawPatternMatcher));
}
for (var vacuousQuery : vacuousQueries) {
resultSets.put(vacuousQuery, new EmptyResultSet<>(this, (Query<?>) vacuousQuery));
}
model.addListener(this);
}
private <T> ResultSet<T> createResultSet(Query<T> query, RawPatternMatcher matcher) {
if (query instanceof RelationalQuery relationalQuery) {
@SuppressWarnings("unchecked")
var resultSet = (ResultSet<T>) new RelationalViatraMatcher(this, relationalQuery, matcher);
return resultSet;
} else if (query instanceof FunctionalQuery<T> functionalQuery) {
return new FunctionalViatraMatcher<>(this, functionalQuery, matcher);
} else {
throw new IllegalArgumentException("Unknown query: " + query);
}
}
@Override
public Model getModel() {
return model;
}
@Override
public ViatraModelQueryStoreAdapterImpl getStoreAdapter() {
return storeAdapter;
}
public CancellationToken getCancellationToken() {
return storeAdapter.getCancellationToken();
}
@Override
public <T> ResultSet<T> getResultSet(Query<T> query) {
var canonicalQuery = storeAdapter.getCanonicalQuery(query);
var resultSet = resultSets.get(canonicalQuery);
if (resultSet == null) {
throw new IllegalArgumentException("No matcher for query %s in model".formatted(query.name()));
}
@SuppressWarnings("unchecked")
var typedResultSet = (ResultSet<T>) resultSet;
return typedResultSet;
}
@Override
public boolean hasPendingChanges() {
return pendingChanges;
}
public void markAsPending() {
if (!pendingChanges) {
pendingChanges = true;
}
}
@Override
public void flushChanges() {
queryEngine.flushChanges();
pendingChanges = false;
}
@Override
public void afterRestore() {
flushChanges();
}
}
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