--- /dev/null
+<?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\ORM\Id;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\ORMException;
+
+/**
+ * Special generator for application-assigned identifiers (doesnt really generate anything).
+ *
+ * @since 2.0
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author Jonathan Wage <jonwage@gmail.com>
+ * @author Roman Borschel <roman@code-factory.org>
+ */
+class AssignedGenerator extends AbstractIdGenerator
+{
+ /**
+ * Returns the identifier assigned to the given entity.
+ *
+ * @param object $entity
+ * @return mixed
+ * @override
+ */
+ public function generate(EntityManager $em, $entity)
+ {
+ $class = $em->getClassMetadata(get_class($entity));
+ $idFields = $class->getIdentifierFieldNames();
+ $identifier = array();
+
+ foreach ($idFields as $idField) {
+ $value = $class->reflFields[$idField]->getValue($entity);
+
+ if ( ! isset($value)) {
+ throw ORMException::entityMissingAssignedIdForField($entity, $idField);
+ }
+
+ if (isset($class->associationMappings[$idField])) {
+ if ( ! $em->getUnitOfWork()->isInIdentityMap($value)) {
+ throw ORMException::entityMissingForeignAssignedId($entity, $value);
+ }
+
+ // NOTE: Single Columns as associated identifiers only allowed - this constraint it is enforced.
+ $value = current($em->getUnitOfWork()->getEntityIdentifier($value));
+ }
+
+ $identifier[$idField] = $value;
+ }
+
+ return $identifier;
+ }
+}