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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.equality;
import tools.refinery.store.query.dnf.Dnf;
import tools.refinery.store.query.dnf.DnfClause;
import tools.refinery.store.query.dnf.SymbolicParameter;
import tools.refinery.store.query.literal.Literal;
import tools.refinery.store.util.CycleDetectingMapper;
import java.util.List;
public class DeepDnfEqualityChecker implements DnfEqualityChecker {
private final CycleDetectingMapper<Pair, Boolean> mapper = new CycleDetectingMapper<>(Pair::toString,
this::doCheckEqual);
@Override
public boolean dnfEqual(Dnf left, Dnf right) {
return mapper.map(new Pair(left, right));
}
public boolean dnfEqualRaw(List<SymbolicParameter> symbolicParameters,
List<? extends List<? extends Literal>> clauses, Dnf other) {
int arity = symbolicParameters.size();
if (arity != other.arity()) {
return false;
}
for (int i = 0; i < arity; i++) {
if (!symbolicParameters.get(i).getDirection().equals(other.getSymbolicParameters().get(i).getDirection())) {
return false;
}
}
int numClauses = clauses.size();
if (numClauses != other.getClauses().size()) {
return false;
}
for (int i = 0; i < numClauses; i++) {
var literalEqualityHelper = new LiteralEqualityHelper(this, symbolicParameters,
other.getSymbolicParameters());
if (!equalsWithSubstitutionRaw(literalEqualityHelper, clauses.get(i), other.getClauses().get(i))) {
return false;
}
}
return true;
}
private boolean equalsWithSubstitutionRaw(LiteralEqualityHelper helper, List<? extends Literal> literals,
DnfClause other) {
int size = literals.size();
if (size != other.literals().size()) {
return false;
}
for (int i = 0; i < size; i++) {
if (!literals.get(i).equalsWithSubstitution(helper, other.literals().get(i))) {
return false;
}
}
return true;
}
protected boolean doCheckEqual(Pair pair) {
return pair.left.equalsWithSubstitution(this, pair.right);
}
protected List<Pair> getInProgress() {
return mapper.getInProgress();
}
protected record Pair(Dnf left, Dnf right) {
@Override
public String toString() {
return "(%s, %s)".formatted(left.name(), right.name());
}
}
}
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