32 lines
1.1 KiB
Java
32 lines
1.1 KiB
Java
package expression.exceptions;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import expression.*;
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/**
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* @author Doschennikov Nikita (me@fymio.us)
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*/
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public class CheckedMultiply extends AbstractBinaryOperation {
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public CheckedMultiply(AbstractExpression l, AbstractExpression r) { super(l, r); }
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@Override protected String getOperator() { return "*"; }
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@Override protected int getPriority() { return 2; }
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@Override protected boolean isRightAssoc() { return false; }
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@Override
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protected int applyInt(int a, int b) {
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if (a == 0 || b == 0) return 0;
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if (a == Integer.MIN_VALUE && b == -1) throw new OverflowException("multiplication");
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if (b == Integer.MIN_VALUE && a == -1) throw new OverflowException("multiplication");
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int result = a * b;
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if (result / a != b) {
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throw new OverflowException("multiplication");
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}
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return result;
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}
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@Override protected BigInteger applyBi(BigInteger a, BigInteger b) { return a.multiply(b); }
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@Override protected BigDecimal applyBd(BigDecimal a, BigDecimal b) { return a.multiply(b); }
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} |