<?php

namespace WP_Forge\Container;

/**
 * Describes the interface of a container that exposes methods to read its entries.
 */
interface ContainerInterface
{
	/**
	 * Finds an entry of the container by its identifier and returns it.
	 *
	 * @param string $id Identifier of the entry to look for.
	 *
	 * @throws NotFoundExceptionInterface  No entry was found for **this** identifier.
	 * @throws ContainerExceptionInterface Error while retrieving the entry.
	 *
	 * @return mixed Entry.
	 */
	public function get($id);

	/**
	 * Returns true if the container can return an entry for the given identifier.
	 * Returns false otherwise.
	 *
	 * `has($id)` returning true does not mean that `get($id)` will not throw an exception.
	 * It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.
	 *
	 * @param string $id Identifier of the entry to look for.
	 *
	 * @return bool
	 */
	public function has($id);
}