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package bjc.utils.dice;
public class CompoundDiceExpression implements DiceExpression {
private DiceExpressionType det;
private DiceExpression left;
private DiceExpression right;
public CompoundDiceExpression(DiceExpression right,
DiceExpression left, DiceExpressionType det) {
this.right = right;
this.left = left;
this.det = det;
}
@Override
public int roll() {
switch (det) {
case ADD:
return right.roll() + left.roll();
case SUBTRACT:
return right.roll() - left.roll();
case MULTIPLY:
return right.roll() * left.roll();
case DIVIDE:
return Math.round(right.roll() / left.roll());
default:
throw new IllegalStateException(
"Got passed a invalid ScalarExpressionType "
+ det);
}
}
}
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