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package tools.refinery.store.query.term.int_;
import tools.refinery.store.query.substitution.Substitution;
import tools.refinery.store.query.term.ArithmeticBinaryOperator;
import tools.refinery.store.query.term.ArithmeticBinaryTerm;
import tools.refinery.store.query.term.Term;
public class IntArithmeticBinaryTerm extends ArithmeticBinaryTerm<Integer> {
public IntArithmeticBinaryTerm(ArithmeticBinaryOperator operator, Term<Integer> left, Term<Integer> right) {
super(operator, left, right);
}
@Override
public Class<Integer> getType() {
return Integer.class;
}
@Override
public Term<Integer> doSubstitute(Substitution substitution, Term<Integer> substitutedLeft,
Term<Integer> substitutedRight) {
return new IntArithmeticBinaryTerm(getOperator(), substitutedLeft, substitutedRight);
}
@Override
protected Integer doEvaluate(Integer leftValue, Integer rightValue) {
return switch (getOperator()) {
case ADD -> leftValue + rightValue;
case SUB -> leftValue - rightValue;
case MUL -> leftValue * rightValue;
case DIV -> rightValue == 0 ? null : leftValue / rightValue;
case POW -> rightValue < 0 ? null : power(leftValue, rightValue);
case MIN -> Math.min(leftValue, rightValue);
case MAX -> Math.max(leftValue, rightValue);
};
}
private static int power(int base, int exponent) {
int accum = 1;
while (exponent > 0) {
if (exponent % 2 == 1) {
accum = accum * base;
}
base = base * base;
exponent = exponent / 2;
}
return accum;
}
}
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