396 lines
8.2 KiB
PHP
396 lines
8.2 KiB
PHP
<?php
|
|
/**
|
|
* @package awf
|
|
* @copyright Copyright (c)2014-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
|
|
* @license GNU GPL version 3 or later
|
|
*/
|
|
|
|
namespace Awf\Database\Driver;
|
|
|
|
use Awf\Database\Driver;
|
|
use Awf\Database\Query;
|
|
|
|
/**
|
|
* Dummy driver class for flat-file CMS
|
|
*
|
|
* This class is adapted from the Joomla! Framework
|
|
*/
|
|
class None extends Driver
|
|
{
|
|
/**
|
|
* The name of the database driver.
|
|
*
|
|
* @var string
|
|
* @since 1.0
|
|
*/
|
|
public $name = 'none';
|
|
|
|
public static $dbtech = 'none';
|
|
|
|
/**
|
|
* Test to see if the PDO ODBC connector is available.
|
|
*
|
|
* @return boolean True on success, false otherwise.
|
|
*
|
|
* @since 1.0
|
|
*/
|
|
public static function isSupported()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get the current query object or a new Query object.
|
|
* We have to override the parent method since it will always return a PDO query, while we have a
|
|
* specialized class for SQLite
|
|
*
|
|
* @param boolean $new False to return the current query object, True to return a new Query object.
|
|
*
|
|
* @return Query The current query object or a new object extending the Query class.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function getQuery($new = false)
|
|
{
|
|
return $this->sql;
|
|
}
|
|
|
|
/**
|
|
* Connects to the database if needed.
|
|
*
|
|
* @return void Returns void if the database connected successfully.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function connect()
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Determines if the connection to the server is active.
|
|
*
|
|
* @return boolean True if connected to the database engine.
|
|
*/
|
|
public function connected()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Disconnects the database.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function disconnect()
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Drops a table from the database.
|
|
*
|
|
* @param string $table The name of the database table to drop.
|
|
* @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
|
|
*
|
|
* @return Driver Returns this object to support chaining.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function dropTable($table, $ifExists = true)
|
|
{
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Method to escape a string for usage in an SQL statement.
|
|
*
|
|
* @param string $text The string to be escaped.
|
|
* @param boolean $extra Optional parameter to provide extra escaping.
|
|
*
|
|
* @return string The escaped string.
|
|
*/
|
|
public function escape($text, $extra = false)
|
|
{
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* Method to fetch a row from the result set cursor as an array.
|
|
*
|
|
* @param mixed $cursor The optional result set cursor from which to fetch the row.
|
|
*
|
|
* @return mixed Either the next row from the result set or false if there are no more rows.
|
|
*
|
|
*/
|
|
protected function fetchArray($cursor = null)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Method to fetch a row from the result set cursor as an associative array.
|
|
*
|
|
* @param mixed $cursor The optional result set cursor from which to fetch the row.
|
|
*
|
|
* @return mixed Either the next row from the result set or false if there are no more rows.
|
|
*
|
|
*/
|
|
protected function fetchAssoc($cursor = null)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Method to fetch a row from the result set cursor as an object.
|
|
*
|
|
* @param mixed $cursor The optional result set cursor from which to fetch the row.
|
|
* @param string $class The class name to use for the returned row object.
|
|
*
|
|
* @return mixed Either the next row from the result set or false if there are no more rows.
|
|
*
|
|
*/
|
|
protected function fetchObject($cursor = null, $class = 'stdClass')
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Method to free up the memory used for the result set.
|
|
*
|
|
* @param mixed $cursor The optional result set cursor from which to fetch the row.
|
|
*
|
|
* @return void
|
|
*
|
|
*/
|
|
protected function freeResult($cursor = null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Get the number of affected rows for the previous executed SQL statement.
|
|
*
|
|
* @return integer The number of affected rows.
|
|
*/
|
|
public function getAffectedRows()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Method to get the database collation in use by sampling a text field of a table in the database.
|
|
*
|
|
* @return mixed The collation in use by the database or boolean false if not supported.
|
|
*
|
|
*/
|
|
public function getCollation()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get the number of returned rows for the previous executed SQL statement.
|
|
*
|
|
* @param resource $cursor An optional database cursor resource to extract the row count from.
|
|
*
|
|
* @return integer The number of returned rows.
|
|
*
|
|
*/
|
|
public function getNumRows($cursor = null)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Retrieves field information about the given tables.
|
|
*
|
|
* @param string $table The name of the database table.
|
|
* @param boolean $typeOnly True (default) to only return field types.
|
|
*
|
|
* @return array An array of fields by table.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function getTableColumns($table, $typeOnly = true)
|
|
{
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Shows the table CREATE statement that creates the given tables.
|
|
*
|
|
* @param mixed $tables A table name or a list of table names.
|
|
*
|
|
* @return array A list of the create SQL for the tables.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function getTableCreate($tables)
|
|
{
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Retrieves field information about the given tables.
|
|
*
|
|
* @param mixed $tables A table name or a list of table names.
|
|
*
|
|
* @return array An array of keys for the table(s).
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function getTableKeys($tables)
|
|
{
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Method to get an array of all tables in the database.
|
|
*
|
|
* @return array An array of all the tables in the database.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function getTableList()
|
|
{
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Get the version of the database connector
|
|
*
|
|
* @return string The database connector version.
|
|
*/
|
|
public function getVersion()
|
|
{
|
|
return '0.0.0';
|
|
}
|
|
|
|
/**
|
|
* Method to get the auto-incremented value from the last INSERT statement.
|
|
*
|
|
* @return integer The value of the auto-increment field from the last inserted row.
|
|
*/
|
|
public function insertid()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Locks a table in the database.
|
|
*
|
|
* @param string $tableName The name of the table to unlock.
|
|
*
|
|
* @return Driver Returns this object to support chaining.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function lockTable($tableName)
|
|
{
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Renames a table in the database.
|
|
*
|
|
* @param string $oldTable The name of the table to be renamed
|
|
* @param string $newTable The new name for the table.
|
|
* @param string $backup Table prefix
|
|
* @param string $prefix For the table - used to rename constraints in non-mysql databases
|
|
*
|
|
* @return Driver Returns this object to support chaining.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
|
|
{
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Select a database for use.
|
|
*
|
|
* @param string $database The name of the database to select for use.
|
|
*
|
|
* @return boolean True if the database was successfully selected.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function select($database)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Set the connection to use UTF-8 character encoding.
|
|
*
|
|
* @return boolean True on success.
|
|
*
|
|
*/
|
|
public function setUTF()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Method to commit a transaction.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function transactionCommit()
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Method to roll back a transaction.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function transactionRollback()
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Method to initialize a transaction.
|
|
*
|
|
* @return void
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function transactionStart()
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Execute the SQL statement.
|
|
*
|
|
* @return mixed A database cursor resource on success, boolean false on failure.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function execute()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Unlocks tables in the database.
|
|
*
|
|
* @return Driver Returns this object to support chaining.
|
|
*
|
|
* @throws \RuntimeException
|
|
*/
|
|
public function unlockTables()
|
|
{
|
|
return $this;
|
|
}
|
|
}
|