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package tools.refinery.store.query.viatra.internal;
import org.eclipse.viatra.query.runtime.api.AdvancedViatraQueryEngine;
import org.eclipse.viatra.query.runtime.api.GenericQueryGroup;
import org.eclipse.viatra.query.runtime.api.GenericQuerySpecification;
import org.eclipse.viatra.query.runtime.api.IQueryGroup;
import tools.refinery.store.map.Cursor;
import tools.refinery.store.map.DiffCursor;
import tools.refinery.store.model.Model;
import tools.refinery.store.model.ModelDiffCursor;
import tools.refinery.store.model.Tuple;
import tools.refinery.store.model.representation.DataRepresentation;
import tools.refinery.store.model.representation.Relation;
import tools.refinery.store.query.QueryableModel;
import tools.refinery.store.query.QueryableModelStore;
import tools.refinery.store.query.building.DNFPredicate;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Stream;
public class ViatraQueryableModel implements QueryableModel {
protected final QueryableModelStore store;
protected final Model model;
protected final Map<DNFPredicate, GenericQuerySpecification<RawPatternMatcher>> predicates2PQuery;
protected RelationalScope scope;
protected AdvancedViatraQueryEngine engine;
protected Map<DNFPredicate, RawPatternMatcher> predicate2Matcher;
public ViatraQueryableModel(QueryableModelStore store, Model model,
Map<DNFPredicate, GenericQuerySpecification<RawPatternMatcher>> predicates2PQuery) {
this.store = store;
this.model = model;
this.predicates2PQuery = predicates2PQuery;
initEngine();
}
private void initEngine() {
this.scope = new RelationalScope(this.model, this.store.getViews());
this.engine = AdvancedViatraQueryEngine.createUnmanagedEngine(this.scope);
this.predicate2Matcher = initMatchers(this.engine, this.predicates2PQuery);
}
private Map<DNFPredicate, RawPatternMatcher> initMatchers(
AdvancedViatraQueryEngine engine,
Map<DNFPredicate, GenericQuerySpecification<RawPatternMatcher>> predicates2pQuery) {
// 1. prepare group
IQueryGroup queryGroup = GenericQueryGroup.of(Set.copyOf(predicates2pQuery.values()));
engine.prepareGroup(queryGroup, null);
// 2. then get all matchers
Map<DNFPredicate, RawPatternMatcher> result = new HashMap<>();
for (var entry : predicates2pQuery.entrySet()) {
var matcher = engine.getMatcher(entry.getValue());
result.put(entry.getKey(), matcher);
}
return result;
}
@Override
public Set<DataRepresentation<?, ?>> getDataRepresentations() {
return model.getDataRepresentations();
}
@Override
public Set<DNFPredicate> getPredicates() {
return store.getPredicates();
}
@Override
public <K, V> V get(DataRepresentation<K, V> representation, K key) {
return model.get(representation, key);
}
@Override
public <K, V> Cursor<K, V> getAll(DataRepresentation<K, V> representation) {
return model.getAll(representation);
}
@SuppressWarnings("unchecked")
@Override
public <K, V> V put(DataRepresentation<K, V> representation, K key, V value) {
V oldValue = this.model.put(representation, key, value);
if (representation instanceof Relation<?> relation) {
this.scope.processUpdate((Relation<V>) relation, (Tuple) key, oldValue, value);
}
return oldValue;
}
@Override
public <K, V> void putAll(DataRepresentation<K, V> representation, Cursor<K, V> cursor) {
if (representation instanceof Relation<?>) {
//noinspection RedundantSuppression
@SuppressWarnings("unchecked")
Relation<V> relation = (Relation<V>) representation;
while (cursor.move()) {
Tuple key = (Tuple) cursor.getKey();
V newValue = cursor.getValue();
V oldValue = this.model.put(relation, key, newValue);
this.scope.processUpdate(relation, key, oldValue, newValue);
}
} else {
this.model.putAll(representation, cursor);
}
}
@Override
public <K, V> long getSize(DataRepresentation<K, V> representation) {
return model.getSize(representation);
}
protected RawPatternMatcher getMatcher(DNFPredicate predicate) {
var result = this.predicate2Matcher.get(predicate);
if (result == null) {
throw new IllegalArgumentException("Model does not contain predicate %s".formatted(predicate.getName()));
} else
return result;
}
protected void validateParameters(DNFPredicate predicate, Object[] parameters) {
int predicateArity = predicate.getVariables().size();
int parameterArity = parameters.length;
if (parameterArity != predicateArity) {
throw new IllegalArgumentException(
"Predicate %s with %d arity called with different number of parameters (%d)"
.formatted(predicate.getName(), predicateArity, parameterArity));
}
}
@Override
public boolean hasResult(DNFPredicate predicate) {
return getMatcher(predicate).hasResult();
}
@Override
public boolean hasResult(DNFPredicate predicate, Object[] parameters) {
validateParameters(predicate, parameters);
return getMatcher(predicate).hasResult(parameters);
}
@Override
public Optional<Object[]> oneResult(DNFPredicate predicate) {
return getMatcher(predicate).oneResult();
}
@Override
public Optional<Object[]> oneResult(DNFPredicate predicate, Object[] parameters) {
validateParameters(predicate, parameters);
return getMatcher(predicate).oneResult(parameters);
}
@Override
public Stream<Object[]> allResults(DNFPredicate predicate) {
return getMatcher(predicate).allResults();
}
@Override
public Stream<Object[]> allResults(DNFPredicate predicate, Object[] parameters) {
validateParameters(predicate, parameters);
return getMatcher(predicate).allResults(parameters);
}
@Override
public int countResults(DNFPredicate predicate) {
return getMatcher(predicate).countResults();
}
@Override
public int countResults(DNFPredicate predicate, Object[] parameters) {
validateParameters(predicate, parameters);
return getMatcher(predicate).countResults(parameters);
}
@Override
public boolean hasChanges() {
return scope.hasChanges();
}
@Override
public void flushChanges() {
this.scope.flush();
}
@Override
public ModelDiffCursor getDiffCursor(long to) {
return model.getDiffCursor(to);
}
@Override
public long commit() {
return this.model.commit();
}
@Override
public void restore(long state) {
restoreWithDiffReplay(state);
}
private void restoreWithDiffReplay(long state) {
var modelDiffCursor = getDiffCursor(state);
for (DataRepresentation<?, ?> dataRepresentation : this.getDataRepresentations()) {
restoreRepresentationWithDiffReplay(modelDiffCursor, dataRepresentation);
}
}
private <K, V> void restoreRepresentationWithDiffReplay(ModelDiffCursor modelDiffCursor,
DataRepresentation<K, V> dataRepresentation) {
DiffCursor<K, V> diffCursor = modelDiffCursor.getCursor(dataRepresentation);
this.putAll(dataRepresentation, diffCursor);
}
}
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