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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.localsearch;
import org.eclipse.viatra.query.runtime.localsearch.operations.generic.GenericTypeExtendSingleValue;
import org.eclipse.viatra.query.runtime.localsearch.operations.util.CallInformation;
import org.eclipse.viatra.query.runtime.localsearch.planner.compiler.GenericOperationCompiler;
import org.eclipse.viatra.query.runtime.matchers.context.IInputKey;
import org.eclipse.viatra.query.runtime.matchers.context.IQueryRuntimeContext;
import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
import org.eclipse.viatra.query.runtime.matchers.tuple.TupleMask;
import java.util.*;
public class RelationalOperationCompiler extends GenericOperationCompiler {
public RelationalOperationCompiler(IQueryRuntimeContext runtimeContext) {
super(runtimeContext);
}
@Override
protected void createExtend(TypeConstraint typeConstraint, Map<PVariable, Integer> variableMapping) {
IInputKey inputKey = typeConstraint.getSupplierKey();
Tuple tuple = typeConstraint.getVariablesTuple();
int[] positions = new int[tuple.getSize()];
List<Integer> boundVariableIndices = new ArrayList<>();
List<Integer> boundVariables = new ArrayList<>();
Set<Integer> unboundVariables = new HashSet<>();
for (int i = 0; i < tuple.getSize(); i++) {
PVariable variable = (PVariable) tuple.get(i);
Integer position = variableMapping.get(variable);
positions[i] = position;
if (variableBindings.get(typeConstraint).contains(position)) {
boundVariableIndices.add(i);
boundVariables.add(position);
} else {
unboundVariables.add(position);
}
}
TupleMask indexerMask = TupleMask.fromSelectedIndices(inputKey.getArity(), boundVariableIndices);
TupleMask callMask = TupleMask.fromSelectedIndices(variableMapping.size(), boundVariables);
// If multiple tuple elements from the indexer should be bound to the same variable, we must use a
// {@link GenericTypeExtend} check whether the tuple elements have the same value.
if (unboundVariables.size() == 1 && indexerMask.getSize() + 1 == indexerMask.getSourceWidth()) {
operations.add(new GenericTypeExtendSingleValue(inputKey, positions, callMask, indexerMask,
unboundVariables.iterator().next()));
} else {
// Use a fixed version of
// {@code org.eclipse.viatra.query.runtime.localsearch.operations.generic.GenericTypeExtend} that handles
// failed unification of variables correctly.
operations.add(new GenericTypeExtend(inputKey, positions, callMask, indexerMask, unboundVariables));
}
}
@Override
protected void createExtend(PositivePatternCall pCall, Map<PVariable, Integer> variableMapping) {
CallInformation information = CallInformation.create(pCall, variableMapping, variableBindings.get(pCall));
// Use a fixed version of
// {@code org.eclipse.viatra.query.runtime.localsearch.operations.extend.ExtendPositivePatternCall} that handles
// failed unification of variables correctly.
operations.add(new ExtendPositivePatternCall(information));
dependencies.add(information.getCallWithAdornment());
}
}
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