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Filename : ServiceLocator.php
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<?php

/*
 * This file is part of Pimple.
 *
 * Copyright (c) 2009 Fabien Potencier
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is furnished
 * to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

namespace Pimple\Psr11;

use Pimple\Container as PimpleContainer;
use Pimple\Exception\UnknownIdentifierException;
use Psr\Container\ContainerInterface;

/**
 * Pimple PSR-11 service locator.
 *
 * @author Pascal Luna <skalpa@zetareticuli.org>
 */
class ServiceLocator implements ContainerInterface
{
    private $container;
    private $aliases = [];

    /**
     * @param PimpleContainer $container The Container instance used to locate services
     * @param array           $ids       Array of service ids that can be located. String keys can be used to define aliases
     */
    public function __construct(PimpleContainer $container, array $ids)
    {
        $this->container = $container;

        foreach ($ids as $key => $id) {
            $this->aliases[\is_int($key) ? $id : $key] = $id;
        }
    }

    /**
     * {@inheritdoc}
     */
    public function get(string $id)
    {
        if (!isset($this->aliases[$id])) {
            throw new UnknownIdentifierException($id);
        }

        return $this->container[$this->aliases[$id]];
    }

    /**
     * {@inheritdoc}
     */
    public function has(string $id)
    {
        return isset($this->aliases[$id]) && isset($this->container[$this->aliases[$id]]);
    }
}