157 lines
4.1 KiB
PHP
157 lines
4.1 KiB
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\ORM\Internal;
|
|
|
|
/**
|
|
* The CommitOrderCalculator is used by the UnitOfWork to sort out the
|
|
* correct order in which changes to entities need to be persisted.
|
|
*
|
|
* @since 2.0
|
|
* @author Roman Borschel <roman@code-factory.org>
|
|
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
|
|
*/
|
|
class CommitOrderCalculator
|
|
{
|
|
const NOT_VISITED = 1;
|
|
const IN_PROGRESS = 2;
|
|
const VISITED = 3;
|
|
|
|
/**
|
|
* @var array
|
|
*/
|
|
private $_nodeStates = array();
|
|
|
|
/**
|
|
* The nodes to sort.
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_classes = array();
|
|
|
|
/**
|
|
* @var array
|
|
*/
|
|
private $_relatedClasses = array();
|
|
|
|
/**
|
|
* @var array
|
|
*/
|
|
private $_sorted = array();
|
|
|
|
/**
|
|
* Clears the current graph.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function clear()
|
|
{
|
|
$this->_classes = array();
|
|
$this->_relatedClasses = array();
|
|
}
|
|
|
|
/**
|
|
* Gets a valid commit order for all current nodes.
|
|
*
|
|
* Uses a depth-first search (DFS) to traverse the graph.
|
|
* The desired topological sorting is the reverse postorder of these searches.
|
|
*
|
|
* @return array The list of ordered classes.
|
|
*/
|
|
public function getCommitOrder()
|
|
{
|
|
// Check whether we need to do anything. 0 or 1 node is easy.
|
|
$nodeCount = count($this->_classes);
|
|
|
|
if ($nodeCount <= 1) {
|
|
return ($nodeCount == 1) ? array_values($this->_classes) : array();
|
|
}
|
|
|
|
// Init
|
|
foreach ($this->_classes as $node) {
|
|
$this->_nodeStates[$node->name] = self::NOT_VISITED;
|
|
}
|
|
|
|
// Go
|
|
foreach ($this->_classes as $node) {
|
|
if ($this->_nodeStates[$node->name] == self::NOT_VISITED) {
|
|
$this->_visitNode($node);
|
|
}
|
|
}
|
|
|
|
$sorted = array_reverse($this->_sorted);
|
|
|
|
$this->_sorted = $this->_nodeStates = array();
|
|
|
|
return $sorted;
|
|
}
|
|
|
|
/**
|
|
* @param \Doctrine\ORM\Mapping\ClassMetadata $node
|
|
*
|
|
* @return void
|
|
*/
|
|
private function _visitNode($node)
|
|
{
|
|
$this->_nodeStates[$node->name] = self::IN_PROGRESS;
|
|
|
|
if (isset($this->_relatedClasses[$node->name])) {
|
|
foreach ($this->_relatedClasses[$node->name] as $relatedNode) {
|
|
if ($this->_nodeStates[$relatedNode->name] == self::NOT_VISITED) {
|
|
$this->_visitNode($relatedNode);
|
|
}
|
|
}
|
|
}
|
|
|
|
$this->_nodeStates[$node->name] = self::VISITED;
|
|
$this->_sorted[] = $node;
|
|
}
|
|
|
|
/**
|
|
* @param \Doctrine\ORM\Mapping\ClassMetadata $fromClass
|
|
* @param \Doctrine\ORM\Mapping\ClassMetadata $toClass
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addDependency($fromClass, $toClass)
|
|
{
|
|
$this->_relatedClasses[$fromClass->name][] = $toClass;
|
|
}
|
|
|
|
/**
|
|
* @param string $className
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function hasClass($className)
|
|
{
|
|
return isset($this->_classes[$className]);
|
|
}
|
|
|
|
/**
|
|
* @param \Doctrine\ORM\Mapping\ClassMetadata $class
|
|
*
|
|
* @return void
|
|
*/
|
|
public function addClass($class)
|
|
{
|
|
$this->_classes[$class->name] = $class;
|
|
}
|
|
}
|