hydra::DB Class Reference

#include <DB.h>

List of all members.

Classes
class	Connection
class	ResetOnExit
class	Statement
Public Member Functions
	DB (const QString &filename, const QString &tablescope)
	DB (DB &linked_db, const QString &tablescope)
virtual	~DB ()
	destructor
bool	contains (const std::string &key)
	is this key even in the db?
bool	contains (const QString &key)
	is this key even in the db?
bool	contains (const char *key)
	is this key even in the db?
bool	erase (const std::string &key)
	removes the key from the db, returns true if anything was done
bool	erase (const QString &key)
	removes the key from the db, returns true if anything was done
bool	erase (const char *key)
	removes the key from the db, returns true if anything was done
bool	insert (const std::string &key, const std::string &value)
	saves to the db, returns true on success, will replace if exists
bool	insert (const QString &key, const std::string &value)
	saves to the db, returns true on success, will replace if exists
bool	insert (const char *key, const std::string &value)
	saves to the db, returns true on success, will replace if exists
bool	get (const std::string &key, std::string &value)
	returns false on not-found or failed to load
bool	get (const QString &key, std::string &value)
	returns false on not-found or failed to load
bool	get (const char *key, std::string &value)
	returns false on not-found or failed to load
bool	insert (const std::string &key, const hydra::Record &value)
	saves to the db, returns true on success, will replace if exists
bool	insert (const QString &key, const hydra::Record &value)
	saves to the db, returns true on success, will replace if exists
bool	insert (const char *key, const hydra::Record &value)
	saves to the db, returns true on success, will replace if exists
bool	get (const std::string &key, hydra::Record &value)
	returns false on not-found or failed to load
bool	get (const QString &key, hydra::Record &value)
	returns false on not-found or failed to load
bool	get (const char *key, hydra::Record &value)
	returns false on not-found or failed to load
Friends
class	hydra::Cursor

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Detailed Description

This represents a sqlite database table.

This in the future, this can be abtracted away as an interface to allow many possible backends (the old BerkleyDB one, postgresql, etc)

Internally, this backend uses std::string and 8-bit UTF strings for size-conservation.

Author:

Aleksander Demko

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Constructor & Destructor Documentation

hydra::DB::DB	(	const QString &	filename,
		const QString &	tablescope
	)

Creates a DB (disk backed map). It will use the given sqllite db file and prepend the given prefix/namespace to the tables. Using different tablescope's allows you to have multiple DBs in the same sqlite file.

Parameters:

filename	the sqlite filename on disk
tablescope	the prefix/table name to use. Cannot be empty.

Author:

Aleksander Demko

hydra::DB::DB	(	DB &	linked_db,
		const QString &	tablescope
	)

Creates a DB (disk backed map). It will use the given sqllite db file and prepend the given prefix/namespace to the tables.

This constructor allows you to reuse anoter DB instance's sqlite connection.

Parameters:

linked_db	the DB from whome this DB will share a single sqlite connection.
tablescope	the prefix/table name to use. Cannot be empty.

Author:

Aleksander Demko

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The documentation for this class was generated from the following file:

• hydra.src/hydra/DB.h