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<?php
/**
* KumbiaPHP web & app Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://wiki.kumbiaphp.com/Licencia
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@kumbiaphp.com so we can send you a copy immediately.
*
* Clase que maneja los metadatos de las tablas
*
* @category Kumbia
* @package DbPool
* @copyright Copyright (c) 2005-2009 Kumbia Team (http://www.kumbiaphp.com)
* @license http://wiki.kumbiaphp.com/Licencia New BSD License
*/
/**
* Clase que maneja los metadatos de las tablas
*
*/
class TableMetaData
{
/**
* Metadatos de la tabla
*
* @var array
**/
private $_metadata = null;
/**
* Instancias de metadata
*
* @var array
**/
private static $_instances = array();
private function __construct()
{}
/**
* Asigna la metadata
*
* @param array $metadata
**/
public function setMetadata($metadata)
{
$this->_metadata = $metadata;
}
/**
* Obtiene la metadata de un campo especifico
*
* @param string $field nombre de campo
* @return array metadatos
**/
public function getField($field)
{
if(!isset($this->_metadata[$field])) {
throw new KumbiaException("No existe la metadata para el campo $field");
}
return $this->_metadata[$field];
}
/**
* Verifica si los metadatos estan cargados
*
* @return boolean
**/
public function isLoaded()
{
return !is_null($this->_metadata);
}
/**
* Obtiene una instancia de la metadata para la tabla
*
* @param string $connection conexion a la bd
* @param string $schema esquema de tabla
* @param string $table nombre de tabla
* @return TableMetaData
**/
public static function getInstance($connection, $schema, $table)
{
if(!isset(self::$_instances[$connection][$schema][$table])) {
self::$_instances[$connection][$schema][$table] = new self();
}
return self::$_instances[$connection][$schema][$table];
}
}
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