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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.term;
import tools.refinery.store.query.InvalidQueryException;
import tools.refinery.store.query.equality.LiteralEqualityHelper;
import tools.refinery.store.query.equality.LiteralHashCodeHelper;
import tools.refinery.store.query.substitution.Substitution;
import tools.refinery.store.query.valuation.Valuation;
import java.util.Objects;
import java.util.Set;
// {@link Object#equals(Object)} is implemented by {@link AbstractTerm}.
@SuppressWarnings("squid:S2160")
public abstract class UnaryTerm<R, T> extends AbstractTerm<R> {
private final Class<T> bodyType;
private final Term<T> body;
protected UnaryTerm(Class<R> type, Class<T> bodyType, Term<T> body) {
super(type);
if (!body.getType().equals(bodyType)) {
throw new InvalidQueryException("Expected body %s to be of type %s, got %s instead".formatted(body,
bodyType.getName(), body.getType().getName()));
}
this.bodyType = bodyType;
this.body = body;
}
public Class<T> getBodyType() {
return bodyType;
}
public Term<T> getBody() {
return body;
}
@Override
public R evaluate(Valuation valuation) {
var bodyValue = body.evaluate(valuation);
return bodyValue == null ? null : doEvaluate(bodyValue);
}
protected abstract R doEvaluate(T bodyValue);
@Override
public boolean equalsWithSubstitution(LiteralEqualityHelper helper, AnyTerm other) {
if (!super.equalsWithSubstitution(helper, other)) {
return false;
}
var otherUnaryTerm = (UnaryTerm<?, ?>) other;
return bodyType.equals(otherUnaryTerm.bodyType) && body.equalsWithSubstitution(helper, otherUnaryTerm.body);
}
@Override
public int hashCodeWithSubstitution(LiteralHashCodeHelper helper) {
return Objects.hash(super.hashCodeWithSubstitution(helper), bodyType, body.hashCodeWithSubstitution(helper));
}
@Override
public Term<R> substitute(Substitution substitution) {
return doSubstitute(substitution, body.substitute(substitution));
}
protected abstract Term<R> doSubstitute(Substitution substitution, Term<T> substitutedBody);
@Override
public Set<AnyDataVariable> getInputVariables() {
return body.getInputVariables();
}
}
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