ContainerInterface.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\DependencyInjection;

use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;

/**
 * ContainerInterface is the interface implemented by service container classes.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 *
 * @api
 */
interface ContainerInterface {
  const EXCEPTION_ON_INVALID_REFERENCE = 1;
  const NULL_ON_INVALID_REFERENCE = 2;
  const IGNORE_ON_INVALID_REFERENCE = 3;
  const SCOPE_CONTAINER = 'container';
  const SCOPE_PROTOTYPE = 'prototype';

  /**
   * Sets a service.
   *
   * @param string $id      The service identifier
   * @param object $service The service instance
   * @param string $scope   The scope of the service
   *
   * @api
   */
  public function set($id, $service, $scope = self::SCOPE_CONTAINER);

  /**
   * Gets a service.
   *
   * @param string $id              The service identifier
   * @param int    $invalidBehavior The behavior when the service does not exist
   *
   * @return object The associated service
   *
   * @throws InvalidArgumentException if the service is not defined
   *
   * @see Reference
   *
   * @api
   */
  public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE);

  /**
   * Returns true if the given service is defined.
   *
   * @param string $id The service identifier
   *
   * @return Boolean true if the service is defined, false otherwise
   *
   * @api
   */
  public function has($id);

  /**
   * Gets a parameter.
   *
   * @param string $name The parameter name
   *
   * @return mixed  The parameter value
   *
   * @throws InvalidArgumentException if the parameter is not defined
   *
   * @api
   */
  public function getParameter($name);

  /**
   * Checks if a parameter exists.
   *
   * @param string $name The parameter name
   *
   * @return Boolean The presence of parameter in container
   *
   * @api
   */
  public function hasParameter($name);

  /**
   * Sets a parameter.
   *
   * @param string $name  The parameter name
   * @param mixed  $value The parameter value
   *
   * @api
   */
  public function setParameter($name, $value);

  /**
   * Enters the given scope
   *
   * @param string $name
   *
   * @api
   */
  public function enterScope($name);

  /**
   * Leaves the current scope, and re-enters the parent scope
   *
   * @param string $name
   *
   * @api
   */
  public function leaveScope($name);

  /**
   * Adds a scope to the container
   *
   * @param ScopeInterface $scope
   *
   * @api
   */
  public function addScope(ScopeInterface $scope);

  /**
   * Whether this container has the given scope
   *
   * @param string $name
   *
   * @return Boolean
   *
   * @api
   */
  public function hasScope($name);

  /**
   * Determines whether the given scope is currently active.
   *
   * It does however not check if the scope actually exists.
   *
   * @param string $name
   *
   * @return Boolean
   *
   * @api
   */
  public function isScopeActive($name);

}