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<?php
/*
* $Id$
*
* 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 LGPL. For more information, see
* <http://www.phpdoctrine.com>.
*/
/**
* Doctrine_Connection_UnitOfWork
*
* @package Doctrine
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Connection_UnitOfWork implements IteratorAggregate, Countable {
/**
* @var Doctrine_Connection $conn the connection object
*/
private $connection;
/**
* the constructor
*
* @param Doctrine_Connection $conn
*/
public function __construct(Doctrine_Connection $conn) {
$this->conn = $conn;
}
/**
* buildFlushTree
* builds a flush tree that is used in transactions
*
* The returned array has all the initialized components in
* 'correct' order. Basically this means that the records of those
* components can be saved safely in the order specified by the returned array.
*
* @param array $tables
* @return array
*/
public function buildFlushTree(array $tables) {
$tree = array();
foreach($tables as $k => $table) {
$k = $k.$table;
if( ! ($table instanceof Doctrine_Table))
$table = $this->conn->getTable($table);
$nm = $table->getComponentName();
$index = array_search($nm,$tree);
if($index === false) {
$tree[] = $nm;
$index = max(array_keys($tree));
}
$rels = $table->getRelations();
// group relations
foreach($rels as $key => $rel) {
if($rel instanceof Doctrine_Relation_ForeignKey) {
unset($rels[$key]);
array_unshift($rels, $rel);
}
}
foreach($rels as $rel) {
$name = $rel->getTable()->getComponentName();
$index2 = array_search($name,$tree);
$type = $rel->getType();
// skip self-referenced relations
if($name === $nm)
continue;
if($rel instanceof Doctrine_Relation_ForeignKey) {
if($index2 !== false) {
if($index2 >= $index)
continue;
unset($tree[$index]);
array_splice($tree,$index2,0,$nm);
$index = $index2;
} else {
$tree[] = $name;
}
} elseif($rel instanceof Doctrine_Relation_LocalKey) {
if($index2 !== false) {
if($index2 <= $index)
continue;
unset($tree[$index2]);
array_splice($tree,$index,0,$name);
} else {
array_unshift($tree,$name);
$index++;
}
} elseif($rel instanceof Doctrine_Relation_Association) {
$t = $rel->getAssociationFactory();
$n = $t->getComponentName();
if($index2 !== false)
unset($tree[$index2]);
array_splice($tree,$index, 0,$name);
$index++;
$index3 = array_search($n,$tree);
if($index3 !== false) {
if($index3 >= $index)
continue;
unset($tree[$index]);
array_splice($tree,$index3,0,$n);
$index = $index2;
} else {
$tree[] = $n;
}
}
}
}
return array_values($tree);
}
/**
* saveRelated
* saves all related records to $record
*
* @throws PDOException if something went wrong at database level
* @param Doctrine_Record $record
*/
public function saveRelated(Doctrine_Record $record) {
$saveLater = array();
foreach($record->getReferences() as $k=>$v) {
$fk = $record->getTable()->getRelation($k);
if($fk instanceof Doctrine_Relation_ForeignKey ||
$fk instanceof Doctrine_Relation_LocalKey) {
if($fk->isComposite()) {
$local = $fk->getLocal();
$foreign = $fk->getForeign();
if($record->getTable()->hasPrimaryKey($fk->getLocal())) {
if( ! $record->exists())
$saveLater[$k] = $fk;
else
$v->save();
} else {
// ONE-TO-ONE relationship
$obj = $record->get($fk->getTable()->getComponentName());
if($obj->getState() != Doctrine_Record::STATE_TCLEAN)
$obj->save();
}
}
} elseif($fk instanceof Doctrine_Relation_Association) {
$v->save();
}
}
return $saveLater;
}
/**
* saveAssociations
*
* this method takes a diff of one-to-many / many-to-many original and
* current collections and applies the changes
*
* for example if original many-to-many related collection has records with
* primary keys 1,2 and 3 and the new collection has records with primary keys
* 3, 4 and 5, this method would first destroy the associations to 1 and 2 and then
* save new associations to 4 and 5
*
* @throws PDOException if something went wrong at database level
* @param Doctrine_Record $record
* @return void
*/
public function saveAssociations(Doctrine_Record $record) {
foreach($record->getTable()->getRelations() as $rel) {
$table = $rel->getTable();
$alias = $rel->getAlias();
$rel->processDiff($record);
}
}
/**
* deletes all related composites
* this method is always called internally when a record is deleted
*
* @throws PDOException if something went wrong at database level
* @return void
*/
public function deleteComposites(Doctrine_Record $record) {
foreach($record->getTable()->getRelations() as $fk) {
switch($fk->getType()):
case Doctrine_Relation::ONE_COMPOSITE:
case Doctrine_Relation::MANY_COMPOSITE:
$obj = $record->get($fk->getAlias());
$obj->delete();
break;
endswitch;
}
}
/**
* saveAll
* persists all the pending records from all tables
*
* @throws PDOException if something went wrong at database level
* @return void
*/
public function saveAll() {
// get the flush tree
$tree = $this->buildFlushTree($this->conn->getTables());
// save all records
foreach($tree as $name) {
$table = $this->conn->getTable($name);
foreach($table->getRepository() as $record) {
$this->conn->save($record);
}
}
// save all associations
foreach($tree as $name) {
$table = $this->conn->getTable($name);
foreach($table->getRepository() as $record) {
$this->saveAssociations($record);
}
}
}
public function getIterator() { }
public function count() { }
}