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doctrine2/lib/Doctrine/DBAL/Schema/SchemaDiff.php

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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.doctrine-project.org>.
*/
namespace Doctrine\DBAL\Schema;
use \Doctrine\DBAL\Platforms\AbstractPlatform;
/**
* Schema Diff
*
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.doctrine-project.org
* @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
* @since 2.0
* @version $Revision$
* @author Benjamin Eberlei <kontakt@beberlei.de>
*/
class SchemaDiff
{
/**
* All added tables
*
* @var array(string=>ezcDbSchemaTable)
*/
public $newTables = array();
/**
* All changed tables
*
* @var array(string=>ezcDbSchemaTableDiff)
*/
public $changedTables = array();
/**
* All removed tables
*
* @var array(string=>Table)
*/
public $removedTables = array();
/**
* @var array
*/
public $newSequences = array();
/**
* @var array
*/
public $changedSequences = array();
/**
* @var array
*/
public $removedSequences = array();
/**
* @var array
*/
public $orphanedForeignKeys = array();
/**
* Constructs an SchemaDiff object.
*
* @param array(string=>Table) $newTables
* @param array(string=>TableDiff) $changedTables
* @param array(string=>bool) $removedTables
*/
public function __construct( $newTables = array(), $changedTables = array(), $removedTables = array() )
{
$this->newTables = $newTables;
$this->changedTables = $changedTables;
$this->removedTables = $removedTables;
}
/**
* The to save sql mode ensures that the following things don't happen:
*
* 1. Tables are deleted
* 2. Sequences are deleted
* 3. Foreign Keys which reference tables that would otherwise be deleted.
*
* This way it is ensured that assets are deleted which might not be relevant to the metadata schema at all.
*
* @param AbstractPlatform $platform
* @return array
*/
public function toSaveSql(AbstractPlatform $platform)
{
return $this->_toSql($platform, true);
}
/**
* @param AbstractPlatform $platform
* @return array
*/
public function toSql(AbstractPlatform $platform)
{
return $this->_toSql($platform, false);
}
/**
* @param AbstractPlatform $platform
* @param bool $saveMode
* @return array
*/
protected function _toSql(AbstractPlatform $platform, $saveMode = false)
{
$sql = array();
if ($platform->supportsForeignKeyConstraints() && $saveMode == false) {
foreach ($this->orphanedForeignKeys AS $orphanedForeignKey) {
$sql[] = $platform->getDropForeignKeySql($orphanedForeignKey, $orphanedForeignKey->getLocalTableName());
}
}
if ($platform->supportsSequences() == true) {
foreach ($this->changedSequences AS $sequence) {
$sql[] = $platform->getDropSequenceSql($sequence);
$sql[] = $platform->getCreateSequenceSql($sequence);
}
if ($saveMode === false) {
foreach ($this->removedSequences AS $sequence) {
$sql[] = $platform->getDropSequenceSql($sequence);
}
}
foreach ($this->newSequences AS $sequence) {
$sql[] = $platform->getCreateSequenceSql($sequence);
}
}
foreach ($this->newTables AS $table) {
$sql = array_merge(
$sql,
$platform->getCreateTableSql($table, AbstractPlatform::CREATE_FOREIGNKEYS|AbstractPlatform::CREATE_INDEXES)
);
}
if ($saveMode === false) {
foreach ($this->removedTables AS $table) {
$sql[] = $platform->getDropTableSql($table);
}
}
foreach ($this->changedTables AS $tableDiff) {
$sql = array_merge($sql, $platform->getAlterTableSql($tableDiff));
}
return $sql;
}
}