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package bjc.dicelang.neodice;
import java.util.*;
/**
* Various static functions which create instances of DiePool.
*
* @author Ben Culkin
*
*/
public class DiePoolFactory {
/**
* Create a die pool containing the provided dice.
*
* @param dice The dice to put into the pool.
*
* @return A pool which contains the provided dice.
*/
public static DiePool containing(Die... dice) {
return new FixedDiePool(dice);
}
}
final class FixedDiePool implements DiePool {
private final Die[] dice;
public FixedDiePool(Die[] dice) {
this.dice = dice;
}
@Override
public int[] roll(Random rng) {
int[] results = new int[dice.length];
for (int index = 0; index < dice.length; index++) {
results[index] = dice[index].roll(rng);
}
return results;
}
@Override
public Die[] contained() {
return dice;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < dice.length; i++) {
Die die = dice[i];
builder.append(die);
// Don't add an extra trailing comma
if (i < dice.length - 1) builder.append(", ");
}
return builder.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(dice);
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
FixedDiePool other = (FixedDiePool) obj;
return Arrays.equals(dice, other.dice);
}
}
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