cached_directory.h

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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Copyright (C) 2008 Sun Microsystems, Inc.
 *
 *  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; version 2 of the License.
 *
 *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#pragma once

#include <iosfwd>
#include <vector>
#include <set>
#include <string>
#include <cstdlib>
#include <cerrno>

namespace drizzled {

class CachedDirectory
{
public:
  enum FILTER 
  {
    NONE,
    DIRECTORY,
    FILE,
    MAX
  };

  class Entry
  {
    Entry();
  public:
    std::string filename;
    explicit Entry(std::string in_name)
      : filename(in_name)
    {}
  };
  typedef std::vector<Entry *> Entries;
  CachedDirectory();
      
  CachedDirectory(const std::string& in_path); 

  CachedDirectory(const std::string& in_path, std::set<std::string>& allowed_exts);
  CachedDirectory(const std::string& in_path, CachedDirectory::FILTER filter, bool use_full_path= false);

  ~CachedDirectory();

  inline bool fail() const 
  {
    return error != 0;
  }

  inline int getError() const
  {
    return error;
  }

  inline const char *getPath() const
  {
    return path.c_str();
  }

  const Entries &getEntries() const
  {
    return entries;
  }
private:
  std::string path; 
  int error; 
  bool use_full_path;
  Entries entries; 

  bool open(const std::string &in_path);

  bool open(const std::string &in_path, std::set<std::string> &allowable_exts);
  bool open(const std::string &in_path, std::set<std::string> &allowed_exts, CachedDirectory::FILTER filter);

  friend std::ostream& operator<<(std::ostream&, const CachedDirectory&);
};

} /* namespace drizzled */