1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
<?php
/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\ActiveRecord;
/**
* Provides a {@link Model} instance.
*/
class ModelProvider
{
/**
* @var callable {@link Model} provider
*/
static private $provider;
/**
* Defines the {@link Model} provider.
*
* @param callable $provider
*
* @return callable The previous provider, or `null` if none was defined.
*/
static public function define(callable $provider)
{
$previous = self::$provider;
self::$provider = $provider;
return $previous;
}
/**
* Returns the current provider.
*
* @return callable|null
*/
static public function defined()
{
return self::$provider;
}
/**
* Undefine the provider.
*/
static public function undefine()
{
self::$provider = null;
}
/**
* Returns a {@link Model} instance using the provider.
*
* @param string $id Model identifier.
*
* @return Model
*
* @throws ModelNotDefined if the model cannot be provided.
*/
static public function provide($id)
{
$provider = self::$provider;
if (!$provider)
{
throw new \LogicException("No provider is defined yet. Please define one with `ModelProvider::define(\$provider)`.");
}
$model = $provider($id);
if (!$model)
{
throw new ModelNotDefined($id);
}
return $model;
}
}