39 lines
1.4 KiB
Java
39 lines
1.4 KiB
Java
package expression;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.util.List;
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/**
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* @author Doschennikov Nikita (me@fymio.us)
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*/
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public class Abs extends AbstractExpression {
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private final AbstractExpression operand;
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public Abs(AbstractExpression operand) {
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this.operand = operand;
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}
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private static int absInt(int n) {
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if (n == Integer.MIN_VALUE) throw new OverflowException("abs");
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return n < 0 ? -n : n;
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}
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@Override public int evaluate(int x) { return absInt(operand.evaluate(x)); }
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@Override public int evaluate(int x, int y, int z) { return absInt(operand.evaluate(x,y,z)); }
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@Override public int evaluate(List<Integer> vars) { return absInt(operand.evaluate(vars)); }
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@Override public BigInteger evaluateBi(List<BigInteger> vars) { return operand.evaluateBi(vars).abs(); }
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@Override public BigDecimal evaluateBd(List<BigDecimal> vars) { return operand.evaluateBd(vars).abs(); }
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@Override public String toString() { return "‖" + operand + "‖"; }
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@Override public String toMiniString() { return "‖" + operand.toMiniString() + "‖"; }
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@Override
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public boolean equals(Object obj) {
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if (this == obj) return true;
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if (!(obj instanceof Abs)) return false;
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return operand.equals(((Abs) obj).operand);
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}
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@Override public int hashCode() { return operand.hashCode() ^ 0x41425321; }
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} |