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/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.representation.cardinality;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.function.IntBinaryOperator;
public record FiniteUpperCardinality(int finiteUpperBound) implements UpperCardinality {
public FiniteUpperCardinality {
if (finiteUpperBound < 0) {
throw new IllegalArgumentException("finiteUpperBound must not be negative");
}
}
@Override
public UpperCardinality add(UpperCardinality other) {
return lift(other, Integer::sum);
}
@Override
@Nullable
public UpperCardinality take(int count) {
if (finiteUpperBound < count) {
return null;
}
return new FiniteUpperCardinality(finiteUpperBound - count);
}
@Override
public UpperCardinality multiply(UpperCardinality other) {
return lift(other, (a, b) -> a * b);
}
@Override
public int compareTo(@NotNull UpperCardinality upperCardinality) {
if (upperCardinality instanceof FiniteUpperCardinality finiteUpperCardinality) {
return compareToInt(finiteUpperCardinality.finiteUpperBound);
}
if (upperCardinality instanceof UnboundedUpperCardinality) {
return -1;
}
throw new IllegalArgumentException("Unknown UpperCardinality: " + upperCardinality);
}
@Override
public int compareToInt(int value) {
return Integer.compare(finiteUpperBound, value);
}
@Override
public String toString() {
return Integer.toString(finiteUpperBound);
}
private UpperCardinality lift(@NotNull UpperCardinality other, IntBinaryOperator operator) {
if (other instanceof FiniteUpperCardinality finiteUpperCardinality) {
return UpperCardinalities.atMost(operator.applyAsInt(finiteUpperBound,
finiteUpperCardinality.finiteUpperBound));
}
if (other instanceof UnboundedUpperCardinality) {
return UpperCardinalities.UNBOUNDED;
}
throw new IllegalArgumentException("Unknown UpperCardinality: " + other);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
FiniteUpperCardinality that = (FiniteUpperCardinality) o;
return finiteUpperBound == that.finiteUpperBound;
}
@Override
public int hashCode() {
return finiteUpperBound;
}
}
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