--- /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\Common\Persistence\Event;
+
+use Doctrine\Common\Persistence\ObjectManager;
+
+/**
+ * Class that holds event arguments for a preUpdate event.
+ *
+ * @author Guilherme Blanco <guilehrmeblanco@hotmail.com>
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @since 2.2
+ */
+class PreUpdateEventArgs extends LifecycleEventArgs
+{
+ /**
+ * @var array
+ */
+ private $entityChangeSet;
+
+ /**
+ * Constructor.
+ *
+ * @param object $entity
+ * @param ObjectManager $objectManager
+ * @param array $changeSet
+ */
+ public function __construct($entity, ObjectManager $objectManager, array &$changeSet)
+ {
+ parent::__construct($entity, $objectManager);
+
+ $this->entityChangeSet = &$changeSet;
+ }
+
+ /**
+ * Retrieves the entity changeset.
+ *
+ * @return array
+ */
+ public function getEntityChangeSet()
+ {
+ return $this->entityChangeSet;
+ }
+
+ /**
+ * Checks if field has a changeset.
+ *
+ * @param string $field
+ *
+ * @return boolean
+ */
+ public function hasChangedField($field)
+ {
+ return isset($this->entityChangeSet[$field]);
+ }
+
+ /**
+ * Gets the old value of the changeset of the changed field.
+ *
+ * @param string $field
+ *
+ * @return mixed
+ */
+ public function getOldValue($field)
+ {
+ $this->assertValidField($field);
+
+ return $this->entityChangeSet[$field][0];
+ }
+
+ /**
+ * Gets the new value of the changeset of the changed field.
+ *
+ * @param string $field
+ *
+ * @return mixed
+ */
+ public function getNewValue($field)
+ {
+ $this->assertValidField($field);
+
+ return $this->entityChangeSet[$field][1];
+ }
+
+ /**
+ * Sets the new value of this field.
+ *
+ * @param string $field
+ * @param mixed $value
+ *
+ * @return void
+ */
+ public function setNewValue($field, $value)
+ {
+ $this->assertValidField($field);
+
+ $this->entityChangeSet[$field][1] = $value;
+ }
+
+ /**
+ * Asserts the field exists in changeset.
+ *
+ * @param string $field
+ *
+ * @return void
+ *
+ * @throws \InvalidArgumentException
+ */
+ private function assertValidField($field)
+ {
+ if ( ! isset($this->entityChangeSet[$field])) {
+ throw new \InvalidArgumentException(sprintf(
+ 'Field "%s" is not a valid field of the entity "%s" in PreUpdateEventArgs.',
+ $field,
+ get_class($this->getEntity())
+ ));
+ }
+ }
+}