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/*
* Copyright (C) 2008 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*
* $Id: database_factory.c 3488 2008-02-21 15:10:02Z martin $
*/
#include "database_factory.h"
#include <utils/linked_list.h>
#include <utils/mutex.h>
typedef struct private_database_factory_t private_database_factory_t;
/**
* private data of database_factory
*/
struct private_database_factory_t {
/**
* public functions
*/
database_factory_t public;
/**
* list of registered database_t implementations
*/
linked_list_t *databases;
/**
* mutex to lock access to databases
*/
mutex_t *mutex;
};
/**
* Implementation of database_factory_t.create.
*/
static database_t* create(private_database_factory_t *this, char *uri)
{
enumerator_t *enumerator;
database_t *database = NULL;
database_constructor_t create;
this->mutex->lock(this->mutex);
enumerator = this->databases->create_enumerator(this->databases);
while (enumerator->enumerate(enumerator, &create))
{
database = create(uri);
if (database)
{
break;
}
}
enumerator->destroy(enumerator);
this->mutex->unlock(this->mutex);
return database;
}
/**
* Implementation of database_factory_t.add_database.
*/
static void add_database(private_database_factory_t *this,
database_constructor_t create)
{
this->mutex->lock(this->mutex);
this->databases->insert_last(this->databases, create);
this->mutex->unlock(this->mutex);
}
/**
* Implementation of database_factory_t.remove_database.
*/
static void remove_database(private_database_factory_t *this,
database_constructor_t create)
{
this->mutex->lock(this->mutex);
this->databases->remove(this->databases, create, NULL);
this->mutex->unlock(this->mutex);
}
/**
* Implementation of database_factory_t.destroy
*/
static void destroy(private_database_factory_t *this)
{
this->databases->destroy(this->databases);
this->mutex->destroy(this->mutex);
free(this);
}
/*
* see header file
*/
database_factory_t *database_factory_create()
{
private_database_factory_t *this = malloc_thing(private_database_factory_t);
this->public.create = (database_t*(*)(database_factory_t*, char *url))create;
this->public.add_database = (void(*)(database_factory_t*, database_constructor_t))add_database;
this->public.remove_database = (void(*)(database_factory_t*, database_constructor_t))remove_database;
this->public.destroy = (void(*)(database_factory_t*))destroy;
this->databases = linked_list_create();
this->mutex = mutex_create(MUTEX_DEFAULT);
return &this->public;
}
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