/usr/share/php/Doctrine/ORM/Id/SequenceGenerator.php is in php-doctrine-orm 2.4.8-2.
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/*
* 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 Serializable;
use Doctrine\ORM\EntityManager;
/**
* Represents an ID generator that uses a database sequence.
*
* @since 2.0
* @author Roman Borschel <roman@code-factory.org>
*/
class SequenceGenerator extends AbstractIdGenerator implements Serializable
{
/**
* The allocation size of the sequence.
*
* @var int
*/
private $_allocationSize;
/**
* The name of the sequence.
*
* @var string
*/
private $_sequenceName;
/**
* @var int
*/
private $_nextValue = 0;
/**
* @var int|null
*/
private $_maxValue = null;
/**
* Initializes a new sequence generator.
*
* @param string $sequenceName The name of the sequence.
* @param integer $allocationSize The allocation size of the sequence.
*/
public function __construct($sequenceName, $allocationSize)
{
$this->_sequenceName = $sequenceName;
$this->_allocationSize = $allocationSize;
}
/**
* Generates an ID for the given entity.
*
* @param EntityManager $em
* @param object $entity
*
* @return integer The generated value.
*
* @override
*/
public function generate(EntityManager $em, $entity)
{
if ($this->_maxValue === null || $this->_nextValue == $this->_maxValue) {
// Allocate new values
$conn = $em->getConnection();
$sql = $conn->getDatabasePlatform()->getSequenceNextValSQL($this->_sequenceName);
$this->_nextValue = (int)$conn->fetchColumn($sql);
$this->_maxValue = $this->_nextValue + $this->_allocationSize;
}
return $this->_nextValue++;
}
/**
* Gets the maximum value of the currently allocated bag of values.
*
* @return integer|null
*/
public function getCurrentMaxValue()
{
return $this->_maxValue;
}
/**
* Gets the next value that will be returned by generate().
*
* @return integer
*/
public function getNextValue()
{
return $this->_nextValue;
}
/**
* @return string
*/
public function serialize()
{
return serialize(array(
'allocationSize' => $this->_allocationSize,
'sequenceName' => $this->_sequenceName
));
}
/**
* @param string $serialized
*
* @return void
*/
public function unserialize($serialized)
{
$array = unserialize($serialized);
$this->_sequenceName = $array['sequenceName'];
$this->_allocationSize = $array['allocationSize'];
}
}
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