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StorageFactory.h

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#ifndef STORAGE_FACTORY_STORAGE_FACTORY_H
# define STORAGE_FACTORY_STORAGE_FACTORY_H

# include "Utilities/StorageFactory/interface/StorageMaker.h"
# include "Utilities/StorageFactory/interface/IOTypes.h"
# include "Utilities/StorageFactory/interface/IOFlags.h"
# include <string>
# include <map>

class Storage;
class StorageFactory 
{
public:
  enum CacheHint
  {
    CACHE_HINT_APPLICATION,
    CACHE_HINT_STORAGE,
    CACHE_HINT_LAZY_DOWNLOAD,
    CACHE_HINT_AUTO_DETECT
  };

  enum ReadHint
  {
    READ_HINT_UNBUFFERED,
    READ_HINT_READAHEAD,
    READ_HINT_AUTO
  };

  static StorageFactory *get (void);
  ~StorageFactory (void);

  // implicit copy constructor
  // implicit assignment operator

  void          setCacheHint(CacheHint value);
  CacheHint     cacheHint(void) const;

  void          setReadHint(ReadHint value);
  ReadHint      readHint(void) const;

  bool          enableAccounting (bool enabled);
  bool          accounting (void) const;

  void          setTempDir (const std::string &s);
  std::string   tempDir (void) const;

  void          stagein (const std::string &url);
  Storage *     open (const std::string &url,
                      int mode = IOFlags::OpenRead,
                      const std::string &tmpdir = "");
  bool          check (const std::string &url,
                       IOOffset *size = 0);

protected:
  typedef std::map<std::string, StorageMaker *> MakerTable;

  StorageFactory (void);
  StorageMaker *getMaker (const std::string &proto);
  StorageMaker *getMaker (const std::string &url,
                          std::string &protocol,
                          std::string &rest);
  
  MakerTable    m_makers;
  CacheHint     m_cacheHint;
  ReadHint      m_readHint;
  bool          m_accounting;
  std::string   m_tempdir;
  static StorageFactory s_instance;
};

#endif // STORAGE_FACTORY_STORAGE_FACTORY_H

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