aria2/src/BitfieldManFactory.h

/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_BITFIELD_MAN_FACTORY_H_
#define _D_BITFIELD_MAN_FACTORY_H_

#include "common.h"
#include "Randomizer.h"
#include "BitfieldMan.h"

class BitfieldManFactory;

typedef SharedHandle<BitfieldManFactory> BitfieldManFactoryHandle;

class BitfieldManFactory {
private:
  static BitfieldManFactoryHandle factory;

  RandomizerHandle randomizer;

  BitfieldManFactory();
public:
  ~BitfieldManFactory() {}

  static BitfieldManFactoryHandle getFactoryInstance() {
    if(factory.isNull()) {
      factory = new BitfieldManFactory();
    }
    return factory;
  }

  BitfieldMan* createBitfieldMan(int blockLength, long long int totalLength) {
    BitfieldMan* bitfieldMan = new BitfieldMan(blockLength, totalLength);
    bitfieldMan->setRandomizer(randomizer);
    return bitfieldMan;
  }

  static void setDefaultRandomizer(const RandomizerHandle& randomizer) {
    BitfieldManFactoryHandle factory = getFactoryInstance();
    factory->setRandomizer(randomizer);
  }

  static RandomizerHandle getDefaultRandomizer() {
    return getFactoryInstance()->getRandomizer();
  }

  void setRandomizer(const RandomizerHandle& randomizer) {
    this->randomizer = randomizer;
  }

  RandomizerHandle getRandomizer() const {
    return randomizer;
  }
};

#endif // _D_BITFIELD_MAN_FACTORY_H_