src/ContainerGetPathCapableTrait.php
<?php
namespace Dhii\Data\Container;
use ArrayAccess;
use Dhii\Util\String\StringableInterface as Stringable;
use InvalidArgumentException;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface as BaseContainerInterface;
use Psr\Container\NotFoundExceptionInterface;
use stdClass;
use Traversable;
/**
* Functionality for getting data from nested container.
*
* @since [*next-version*]
*/
trait ContainerGetPathCapableTrait
{
/**
* Retrieves a value from a chain of nested containers by path.
*
* @since [*next-version*]
*
* @param array|ArrayAccess|stdClass|BaseContainerInterface $container The top container in the chain to read from.
* @param array|Traversable|stdClass $path The list of path segments.
*
* @throws InvalidArgumentException If one of the containers in the chain is invalid.
* @throws ContainerExceptionInterface If an error occurred while reading from one of the containers in the chain.
* @throws NotFoundExceptionInterface If one of the containers in the chain does not have the corresponding key.
*
* @return mixed The value at the specified path.
*/
protected function _containerGetPath($container, $path)
{
$path = $this->_normalizeIterable($path);
$service = $container;
foreach ($path as $segment) {
$service = $this->_containerGet($service, $segment);
}
return $service;
}
/**
* Retrieves a value from a container or data set.
*
* @since [*next-version*]
*
* @param array|ArrayAccess|stdClass|BaseContainerInterface $container The container to read from.
* @param string|int|float|bool|Stringable $key The key of the value to retrieve.
*
* @throws InvalidArgumentException If container is invalid.
* @throws ContainerExceptionInterface If an error occurred while reading from the container.
* @throws NotFoundExceptionInterface If the key was not found in the container.
*
* @return mixed The value mapped to the given key.
*/
abstract protected function _containerGet($container, $key);
/**
* Normalizes an iterable.
*
* Makes sure that the return value can be iterated over.
*
* @since [*next-version*]
*
* @param mixed $iterable The iterable to normalize.
*
* @throws InvalidArgumentException If the iterable could not be normalized.
*
* @return array|Traversable|stdClass The normalized iterable.
*/
abstract protected function _normalizeIterable($iterable);
}