Twig-1.3.0/lib/Twig/Loader/Chain.php
changeset 4 9a001a04b634
equal deleted inserted replaced
3:6d109e3804ac 4:9a001a04b634
       
     1 <?php
       
     2 
       
     3 /*
       
     4  * This file is part of Twig.
       
     5  *
       
     6  * (c) 2011 Fabien Potencier
       
     7  *
       
     8  * For the full copyright and license information, please view the LICENSE
       
     9  * file that was distributed with this source code.
       
    10  */
       
    11 
       
    12 /**
       
    13  * Loads templates from other loaders.
       
    14  *
       
    15  * @package twig
       
    16  * @author  Fabien Potencier <fabien@symfony.com>
       
    17  */
       
    18 class Twig_Loader_Chain implements Twig_LoaderInterface
       
    19 {
       
    20     protected $loaders;
       
    21 
       
    22     /**
       
    23      * Constructor.
       
    24      *
       
    25      * @param Twig_LoaderInterface[] $loaders An array of loader instances
       
    26      */
       
    27     public function __construct(array $loaders = array())
       
    28     {
       
    29         $this->loaders = array();
       
    30         foreach ($loaders as $loader) {
       
    31             $this->addLoader($loader);
       
    32         }
       
    33     }
       
    34 
       
    35     /**
       
    36      * Adds a loader instance.
       
    37      *
       
    38      * @param Twig_LoaderInterface $loader A Loader instance
       
    39      */
       
    40     public function addLoader(Twig_LoaderInterface $loader)
       
    41     {
       
    42         $this->loaders[] = $loader;
       
    43     }
       
    44 
       
    45     /**
       
    46      * Gets the source code of a template, given its name.
       
    47      *
       
    48      * @param  string $name The name of the template to load
       
    49      *
       
    50      * @return string The template source code
       
    51      */
       
    52     public function getSource($name)
       
    53     {
       
    54         foreach ($this->loaders as $loader) {
       
    55             try {
       
    56                 return $loader->getSource($name);
       
    57             } catch (Twig_Error_Loader $e) {
       
    58             }
       
    59         }
       
    60 
       
    61         throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
       
    62     }
       
    63 
       
    64     /**
       
    65      * Gets the cache key to use for the cache for a given template name.
       
    66      *
       
    67      * @param  string $name The name of the template to load
       
    68      *
       
    69      * @return string The cache key
       
    70      */
       
    71     public function getCacheKey($name)
       
    72     {
       
    73         foreach ($this->loaders as $loader) {
       
    74             try {
       
    75                 return $loader->getCacheKey($name);
       
    76             } catch (Twig_Error_Loader $e) {
       
    77             }
       
    78         }
       
    79 
       
    80         throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
       
    81     }
       
    82 
       
    83     /**
       
    84      * Returns true if the template is still fresh.
       
    85      *
       
    86      * @param string    $name The template name
       
    87      * @param timestamp $time The last modification time of the cached template
       
    88      */
       
    89     public function isFresh($name, $time)
       
    90     {
       
    91         foreach ($this->loaders as $loader) {
       
    92             try {
       
    93                 return $loader->isFresh($name, $time);
       
    94             } catch (Twig_Error_Loader $e) {
       
    95             }
       
    96         }
       
    97 
       
    98         throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
       
    99     }
       
   100 }