ObjectManager.php

<?php

/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */
namespace Doctrine\Common\Persistence;


/**
 * Contract for a Doctrine persistence layer ObjectManager class to implement.
 *
 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link    www.doctrine-project.org
 * @since   2.1
 * @author  Benjamin Eberlei <kontakt@beberlei.de>
 * @author  Jonathan Wage <jonwage@gmail.com>
 */
interface ObjectManager {

  /**
   * Finds a object by its identifier.
   *
   * This is just a convenient shortcut for getRepository($className)->find($id).
   *
   * @param string
   * @param mixed
   * @return object
   */
  function find($className, $id);

  /**
   * Tells the ObjectManager to make an instance managed and persistent.
   *
   * The object will be entered into the database as a result of the flush operation.
   *
   * NOTE: The persist operation always considers objects that are not yet known to
   * this ObjectManager as NEW. Do not pass detached objects to the persist operation.
   *
   * @param object $object The instance to make managed and persistent.
   */
  function persist($object);

  /**
   * Removes an object instance.
   *
   * A removed object will be removed from the database as a result of the flush operation.
   *
   * @param object $object The object instance to remove.
   */
  function remove($object);

  /**
   * Merges the state of a detached object into the persistence context
   * of this ObjectManager and returns the managed copy of the object.
   * The object passed to merge will not become associated/managed with this ObjectManager.
   *
   * @param object $object
   * @return object
   */
  function merge($object);

  /**
   * Clears the ObjectManager. All objects that are currently managed
   * by this ObjectManager become detached.
   *
   * @param string $objectName if given, only objects of this type will get detached
   */
  function clear($objectName = null);

  /**
   * Detaches an object from the ObjectManager, causing a managed object to
   * become detached. Unflushed changes made to the object if any
   * (including removal of the object), will not be synchronized to the database.
   * Objects which previously referenced the detached object will continue to
   * reference it.
   *
   * @param object $object The object to detach.
   */
  function detach($object);

  /**
   * Refreshes the persistent state of an object from the database,
   * overriding any local changes that have not yet been persisted.
   *
   * @param object $object The object to refresh.
   */
  function refresh($object);

  /**
   * Flushes all changes to objects that have been queued up to now to the database.
   * This effectively synchronizes the in-memory state of managed objects with the
   * database.
   */
  function flush();

  /**
   * Gets the repository for a class.
   *
   * @param string $className
   * @return \Doctrine\Common\Persistence\ObjectRepository
   */
  function getRepository($className);

  /**
   * Returns the ClassMetadata descriptor for a class.
   *
   * The class name must be the fully-qualified class name without a leading backslash
   * (as it is returned by get_class($obj)).
   *
   * @param string $className
   * @return \Doctrine\Common\Persistence\Mapping\ClassMetadata
   */
  function getClassMetadata($className);

  /**
   * Gets the metadata factory used to gather the metadata of classes.
   *
   * @return \Doctrine\Common\Persistence\Mapping\ClassMetadataFactory
   */
  function getMetadataFactory();

  /**
   * Helper method to initialize a lazy loading proxy or persistent collection.
   *
   * This method is a no-op for other objects.
   *
   * @param object $obj
   */
  function initializeObject($obj);

  /**
   * Check if the object is part of the current UnitOfWork and therefore
   * managed.
   *
   * @param object $object
   * @return bool
   */
  function contains($object);

}