options = new stdClass;
$this->cache = array('columns' => array(), 'keys' => array());
// Set up the class defaults:
// Export with only structure
$this->withStructure();
// Export as xml.
$this->asXml();
// Default destination is a string using $output = (string) $exporter;
}
/**
* Magic function to exports the data to a string.
*
* @return string
*
* @since 11.1
* @throws Exception if an error is encountered.
*/
public function __toString()
{
// Check everything is ok to run first.
$this->check();
return $this->buildXml();
}
/**
* Set the output option for the exporter to XML format.
*
* @return JDatabaseExporterMySQL Method supports chaining.
*
* @since 11.1
*/
public function asXml()
{
$this->asFormat = 'xml';
return $this;
}
/**
* Builds the XML data for the tables to export.
*
* @return string An XML string
*
* @since 11.1
* @throws Exception if an error occurs.
*/
protected function buildXml()
{
$buffer = array();
$buffer[] = '';
$buffer[] = '';
$buffer[] = ' ';
$buffer = array_merge($buffer, $this->buildXmlStructure());
$buffer[] = ' ';
$buffer[] = '';
return implode("\n", $buffer);
}
/**
* Builds the XML structure to export.
*
* @return array An array of XML lines (strings).
*
* @since 11.1
* @throws Exception if an error occurs.
*/
protected function buildXmlStructure()
{
$buffer = array();
foreach ($this->from as $table)
{
// Replace the magic prefix if found.
$table = $this->getGenericTableName($table);
// Get the details columns information.
$fields = $this->db->getTableColumns($table, false);
$keys = $this->db->getTableKeys($table);
$buffer[] = ' ';
foreach ($fields as $field)
{
$buffer[] = ' Default) ? ' Default="' . $field->Default . '"' : '') . ' Extra="' . $field->Extra . '"' .
' />';
}
foreach ($keys as $key)
{
$buffer[] = ' ';
}
$buffer[] = ' ';
}
return $buffer;
}
/**
* Checks if all data and options are in order prior to exporting.
*
* @return JDatabaseExporterMysqli Method supports chaining.
*
* @since 11.1
* @throws Exception if an error is encountered.
*/
public function check()
{
// Check if the db connector has been set.
if (!($this->db instanceof JDatabaseDriverMysqli))
{
throw new Exception('JPLATFORM_ERROR_DATABASE_CONNECTOR_WRONG_TYPE');
}
// Check if the tables have been specified.
if (empty($this->from))
{
throw new Exception('JPLATFORM_ERROR_NO_TABLES_SPECIFIED');
}
return $this;
}
/**
* Get the generic name of the table, converting the database prefix to the wildcard string.
*
* @param string $table The name of the table.
*
* @return string The name of the table with the database prefix replaced with #__.
*
* @since 11.1
*/
protected function getGenericTableName($table)
{
// TODO Incorporate into parent class and use $this.
$prefix = $this->db->getPrefix();
// Replace the magic prefix if found.
$table = preg_replace("|^$prefix|", '#__', $table);
return $table;
}
/**
* Specifies a list of table names to export.
*
* @param mixed $from The name of a single table, or an array of the table names to export.
*
* @return JDatabaseExporterMysql Method supports chaining.
*
* @since 11.1
* @throws Exception if input is not a string or array.
*/
public function from($from)
{
if (is_string($from))
{
$this->from = array($from);
}
elseif (is_array($from))
{
$this->from = $from;
}
else
{
throw new Exception('JPLATFORM_ERROR_INPUT_REQUIRES_STRING_OR_ARRAY');
}
return $this;
}
/**
* Sets the database connector to use for exporting structure and/or data from MySQL.
*
* @param JDatabaseDriverMysqli $db The database connector.
*
* @return JDatabaseExporterMysqli Method supports chaining.
*
* @since 11.1
*/
public function setDbo(JDatabaseDriverMysqli $db)
{
$this->db = $db;
return $this;
}
/**
* Sets an internal option to export the structure of the input table(s).
*
* @param boolean $setting True to export the structure, false to not.
*
* @return JDatabaseExporterMysql Method supports chaining.
*
* @since 11.1
*/
public function withStructure($setting = true)
{
$this->options->withStructure = (boolean) $setting;
return $this;
}
}