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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.query.rewriter;
import tools.refinery.store.query.dnf.Dnf;
import tools.refinery.store.query.dnf.DnfBuilder;
import tools.refinery.store.query.literal.Literal;
import tools.refinery.store.query.term.ParameterDirection;
import tools.refinery.store.query.term.Variable;
import java.util.HashSet;
import java.util.List;
public class InputParameterResolver extends AbstractRecursiveRewriter {
@Override
protected Dnf doRewrite(Dnf dnf) {
return rewriteWithContext(List.of(), dnf);
}
Dnf rewriteWithContext(List<Literal> context, Dnf dnf) {
var dnfName = dnf.name();
var builder = Dnf.builder(dnfName);
createSymbolicParameters(context, dnf, builder);
builder.functionalDependencies(dnf.getFunctionalDependencies());
var clauses = dnf.getClauses();
int clauseCount = clauses.size();
for (int i = 0; i < clauseCount; i++) {
var clause = clauses.get(i);
var clauseRewriter = new ClauseInputParameterResolver(this, context, clause, dnfName, i);
builder.clause(clauseRewriter.rewriteClause());
}
return builder.build();
}
private static void createSymbolicParameters(List<Literal> context, Dnf dnf, DnfBuilder builder) {
var positiveInContext = new HashSet<Variable>();
for (var literal : context) {
positiveInContext.addAll(literal.getOutputVariables());
}
for (var symbolicParameter : dnf.getSymbolicParameters()) {
var variable = symbolicParameter.getVariable();
var isOutput = symbolicParameter.getDirection() == ParameterDirection.OUT ||
positiveInContext.contains(variable);
var direction = isOutput ? ParameterDirection.OUT : ParameterDirection.IN;
builder.parameter(variable, direction);
}
}
}
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