///////////////////////////////////////////////////////////////////////

// File:        dawg_cache.h

// Description: A class that knows about loading and caching dawgs.

// Author:      David Eger

// Created:     Fri Jan 27 12:08:00 PST 2012

//

// (C) Copyright 2012, Google Inc.

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

///////////////////////////////////////////////////////////////////////

#ifndef TESSERACT_DICT_DAWG_CACHE_H_

#define TESSERACT_DICT_DAWG_CACHE_H_

#include "dawg.h"

#include "object_cache.h"

#include "tessdatamanager.h"

namespace tesseract {

class DawgCache {

public:

  Dawg *GetSquishedDawg(const std::string &lang, TessdataType tessdata_dawg_type, int debug_level,

                        TessdataManager *data_file);

  // If we manage the given dawg, decrement its count,

  // and possibly delete it if the count reaches zero.

  // If dawg is unknown to us, return false.

  bool FreeDawg(Dawg *dawg) {

    return dawgs_.Free(dawg);

  }

  // Free up any currently unused dawgs.

  void DeleteUnusedDawgs() {

    dawgs_.DeleteUnusedObjects();

  }

private:

  ObjectCache<Dawg> dawgs_;

};

} // namespace tesseract

#endif // TESSERACT_DICT_DAWG_CACHE_H_