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package bjc.dicelang.dice;
import java.util.LinkedList;
import java.util.List;
import java.util.function.Predicate;
/**
* An exploding die.
*
* Represents a die list that keeps getting another added die as long as a
* condition is met.
*
* @author Ben Culkin
*/
public class ExplodingDice implements DieList {
/* The source die to use. */
private final Die source;
/* The conditions for exploding. */
private final Predicate<Long> explodeOn;
private final String explodePattern;
/* Whether or not to apply a -1 penalty to explosions. */
private final boolean explodePenetrates;
/**
* Create a new exploding die.
*
* @param src
* The source die for exploding.
* @param explode
* The condition to explode on.
*/
public ExplodingDice(final Die src, final Predicate<Long> explode) {
this(src, explode, null, false);
}
/**
* Create a new exploding die that may penetrate.
*
* @param src
* The source die for exploding.
* @param explode
* The condition to explode on.
* @param penetrate
* Whether or not for explosions to penetrate (-1 to
* exploded die).
*/
public ExplodingDice(final Die src, final Predicate<Long> explode,
final boolean penetrate) {
this(src, explode, null, penetrate);
}
/**
* Create a new exploding die that may penetrate.
*
* @param src
* The source die for exploding.
* @param explode
* The condition to explode on.
* @param penetrate
* Whether or not for explosions to penetrate (-1 to
* exploded die).
* @param patt
* The string the condition came from, for printing.
*/
public ExplodingDice(final Die src, final Predicate<Long> explode, final String patt,
final boolean penetrate) {
source = src;
explodeOn = explode;
explodePattern = patt;
explodePenetrates = penetrate;
}
@Override
public boolean canOptimize() {
return false;
}
@Override
public long[] optimize() {
return new long[0];
}
@Override
public long[] roll() {
final long res = source.roll();
long oldRes = res;
final List<Long> resList = new LinkedList<>();
resList.add(res);
while (explodeOn.test(oldRes)) {
oldRes = source.rollSingle();
if (explodePenetrates) {
oldRes -= 1;
}
resList.add(oldRes);
}
final long resArr[] = new long[resList.size()];
int i = 0;
for(long rll : resList) {
resArr[i] = rll;
i += 1;
}
return resArr;
}
@Override
public String toString() {
String penString = explodePenetrates ? "p" : "";
String sourceString = source.toString();
if (explodePattern == null) {
return String.format("%s%s!<complex-pred>", sourceString, penString);
}
return String.format("%s%s!%s", sourceString, penString, explodePattern);
}
}
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