ClosureCacheAdapter.php

<?php
 
namespace Guzzle\Cache;
 
class ClosureCacheAdapter implements CacheAdapterInterface
{
    protected $callables;
 
    public function __construct(array $callables)
    {
        // Validate each key to ensure it exists and is callable
        foreach (array('contains', 'delete', 'fetch', 'save') as $key) {
            if (!array_key_exists($key, $callables) || !is_callable($callables[$key])) {
                throw new \InvalidArgumentException("callables must contain a callable {$key} key");
            }
        }
 
        $this->callables = $callables;
    }
 
    public function contains($id, array $options = null)
    {
        return call_user_func($this->callables['contains'], $id, $options);
    }
 
    public function delete($id, array $options = null)
    {
        return call_user_func($this->callables['delete'], $id, $options);
    }
 
    public function fetch($id, array $options = null)
    {
        return call_user_func($this->callables['fetch'], $id, $options);
    }
 
    public function save($id, $data, $lifeTime = false, array $options = null)
    {
        return call_user_func($this->callables['save'], $id, $data, $lifeTime, $options);
    }
}