content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  Aion-Lightning is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details. *
   *  You should have received a copy of the GNU General Public License
   *  along with Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  
  
  package com.aionemu.chatserver.utils;
  
  import java.util.BitSet;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.locks.ReentrantLock;
  
  /**
   * Simplified version of idfactory
   *
   * @author ATracer
   */
  public class IdFactory {
  
      private final BitSet idList = new BitSet();
      private final ReentrantLock lock = new ReentrantLock();
      private AtomicInteger nextMinId = new AtomicInteger(1);
      protected static IdFactory instance = new IdFactory();
  
      public int nextId() {
          try {
              lock.lock();
              int id = idList.nextClearBit(nextMinId.intValue());
              idList.set(id);
              nextMinId.incrementAndGet();
              return id;
          } finally {
              lock.unlock();
          }
      }
  
      public static IdFactory getInstance() {
          return instance;
      }
  }
  