FixedBitSet Pooler

FixedBitSetPool.java

public class FixedBitSetPool {

  public static final int poolSize = 10;
  private static ArrayBlockingQueue<FixedBitSet> pool = new ArrayBlockingQueue<FixedBitSet>(poolSize);

  // Ask for a FBS
  public static FixedBitSet request(int size) {
    FixedBitSet next = pool.poll();
    if (next == null || next.length() < size) {
      // if the size doesn't match, throw it away and return a new one of the requested size
      return new FixedBitSet(size);
    }
    else {
      return next;
    }
  }
  
  // Offer up a FBS for reuse
  public static void recycle(FixedBitSet bs) {
    bs.clear(0, bs.length());
    pool.offer(bs);
  }
}