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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.equality.LiteralEqualityHelper;
import tools.refinery.store.query.substitution.Substitution;
import tools.refinery.store.query.valuation.Valuation;
import java.util.Objects;
import java.util.Set;
public final class ConstantTerm<T> extends AbstractTerm<T> {
private final T value;
public ConstantTerm(Class<T> type, T value) {
super(type);
if (value != null && !type.isInstance(value)) {
throw new IllegalArgumentException("Value %s is not an instance of %s".formatted(value, type.getName()));
}
this.value = value;
}
public T getValue() {
return value;
}
@Override
public T evaluate(Valuation valuation) {
return getValue();
}
@Override
public Term<T> substitute(Substitution substitution) {
return this;
}
@Override
public boolean equalsWithSubstitution(LiteralEqualityHelper helper, AnyTerm other) {
if (!super.equalsWithSubstitution(helper, other)) {
return false;
}
var otherConstantTerm = (ConstantTerm<?>) other;
return Objects.equals(value, otherConstantTerm.value);
}
@Override
public Set<AnyDataVariable> getInputVariables() {
return Set.of();
}
@Override
public String toString() {
return value.toString();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ConstantTerm<?> that = (ConstantTerm<?>) o;
return Objects.equals(value, that.value);
}
@Override
public int hashCode() {
return Objects.hash(value);
}
}
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