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<?php
namespace Acclimate\Container;
use Interop\Container\ContainerInterface;
use Acclimate\Container\Exception\NotFoundException;
/**
* A composite container that acts as a normal container, but delegates method calls to one or more internal containers
*/
class CompositeContainer implements ContainerInterface
{
/**
* @var array Containers that are contained within this composite container
*/
protected $containers = array();
/**
* @param array $containers Containers to add to this composite container
*/
public function __construct(array $containers = array())
{
foreach ($containers as $container) {
$this->addContainer($container);
}
}
/**
* Adds a container to an internal queue of containers
*
* @param ContainerInterface $container The container to add
*
* @return $this
*/
public function addContainer(ContainerInterface $container)
{
$this->containers[] = $container;
return $this;
}
/**
* Finds an entry of the container by delegating the get call to a FIFO queue of internal containers
*
* {@inheritDoc}
*/
public function get($id)
{
/** @var ContainerInterface $container */
foreach ($this->containers as $container) {
if ($container->has($id)) {
return $container->get($id);
}
}
throw NotFoundException::fromPrevious($id);
}
/**
* Returns true if the at least one of the internal containers can return an entry for the given identifier
* Returns false otherwise.
*
* {@inheritDoc}
*/
public function has($id)
{
/** @var ContainerInterface $container */
foreach ($this->containers as $container) {
if ($container->has($id)) {
return true;
}
}
return false;
}
}