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package bjc.dicelang.dicev2;
import java.util.function.LongBinaryOperator;
/**
* Die pool which performs a reduction.
*
* @author Ben Culkin
*
*/
public class ReduceDieMod extends Die {
/**
* The die pool.
*/
public final Die[] dice;
/**
* The reduction operation.
*/
public final LongBinaryOperator fold;
/**
* The initial value for the reduction.
*/
public final long initial;
/**
* Create a new reducing die pool.
*
* @param fold The reduction operation.
* @param initial The initial value for the reduction.
* @param dice The die pool.
*/
public ReduceDieMod(LongBinaryOperator fold, long initial, Die... dice) {
super();
this.dice = dice;
this.fold = fold;
this.initial = initial;
}
@Override
public long[] roll() {
return new long[] { rollSingle() };
}
@Override
public long rollSingle() {
long res = initial;
for(Die die : dice) {
for(long val : die.roll()) {
res = fold.applyAsLong(res, val);
}
}
return res;
}
@Override
public boolean canOptimize() {
for(Die die : dice) {
if(!die.canOptimize()) return false;
}
return true;
}
@Override
public long optimize() {
long res = 0;
for(Die die : dice) {
res = fold.applyAsLong(res, die.optimize());
}
return res;
}
}
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