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package bjc.dicelang.neodice;
import java.util.*;
/**
* Various static functions which create instances of Die.
*
* @author Ben Culkin
*
*/
public class DieFactory {
/**
* Create a simple polyhedral die with a fixed number of sides.
*
* @param sides The number of sides for the die.
*
* @return A die which returns a result from 1 to sides.
*/
public static Die polyhedral(int sides) {
return new PolyhedralDie(sides);
}
}
final class PolyhedralDie implements Die {
private final int sides;
public PolyhedralDie(int sides) {
this.sides = sides;
}
@Override
public int roll(Random rng) {
// Dice are one-based, not zero-based.
return rng.nextInt(sides) + 1;
}
@Override
public String toString() {
return String.format("d%d", sides);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + sides;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
PolyhedralDie other = (PolyhedralDie) obj;
if (sides != other.sides) return false;
else return true;
}
}
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