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doctrine2/lib/Doctrine/Query/Production/VariableDeclaration.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.phpdoctrine.org>.
*/
/**
* VariableDeclaration = identifier [["AS"] IdentificationVariable]
*
* @package Doctrine
* @subpackage Query
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
* @author Janne Vanhala <jpvanhal@cc.hut.fi>
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link http://www.phpdoctrine.org
* @since 2.0
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* @version $Revision$
*/
class Doctrine_Query_Production_VariableDeclaration extends Doctrine_Query_Production
{
protected $_componentName;
protected $_componentAlias;
public function syntax($paramHolder)
{
// VariableDeclaration = identifier [["AS"] IdentificationVariable]
if ($this->_parser->match(Doctrine_Query_Token::T_IDENTIFIER)) {
// identifier
$this->_componentName = $this->_parser->token['value'];
}
if ($this->_isNextToken(Doctrine_Query_Token::T_AS)) {
$this->_parser->match(Doctrine_Query_Token::T_AS);
}
if ($this->_isNextToken(Doctrine_Query_Token::T_IDENTIFIER)) {
$paramHolder->set('componentName', $this->_componentName);
// Will return an identifier, with the semantical check already applied
$this->_componentAlias = $this->AST('IdentificationVariable', $paramHolder);
$paramHolder->remove('componentName');
}
}
public function semantical($paramHolder)
{
$parserResult = $this->_parser->getParserResult();
if ($parserResult->hasQueryComponent($this->_componentName)) {
// As long as name != alias, try to bring the queryComponent from name (already processed)
$queryComponent = $parserResult->getQueryComponent($this->_componentName);
// Check if we defined _componentAlias. We throw semantical error if not
if ($this->_componentAlias === null) {
$componentName = $queryComponent['metadata']->getClassName();
$this->_parser->semanticalError(
"Cannot re-declare component '{$this->_componentName}'. Please assign an alias to it."
);
return;
}
} else {
// No queryComponent was found. We will have to build it for the first time
// Get the connection for the component
$conn = $this->_em->getConnection();
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// Retrieving ClassMetadata and Mapper
try {
$classMetadata = $this->_em->getMetadata($this->_componentName);
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// Building queryComponent
$queryComponent = array(
'metadata' => $classMetadata,
'parent' => null,
'relation' => null,
'map' => null,
'scalar' => null,
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);
} catch (Doctrine_Exception $e) {
$this->_parser->semanticalError($e->getMessage());
return;
}
}
// Define ParserResult assertions for later usage
$tableAlias = $this->_parser->getParserResult()->generateTableAlias($this->_componentName);
if ($this->_componentAlias === null) {
$this->_componentAlias = $this->_componentName;
}
$parserResult->setQueryComponent($this->_componentAlias, $queryComponent);
$parserResult->setTableAlias($tableAlias, $this->_componentAlias);
}
public function buildSql()
{
// Basic handy variables
$parserResult = $this->_parser->getParserResult();
$queryComponent = $parserResult->getQueryComponent($this->_componentAlias);
// Retrieving connection
$conn = $this->_em->getConnection();
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return $conn->quoteIdentifier($queryComponent['metadata']->getTableName()) . ' '
. $conn->quoteIdentifier($parserResult->getTableAliasFromComponentAlias($this->_componentAlias));
}
/**
* Visitor support.
*/
public function accept($visitor)
{
$visitor->visitVariableDeclaration($this);
}
/* Getters */
public function getComponentName()
{
return $this->_componentName;
}
public function getComponentAlias()
{
return $this->_componentAlias;
}
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}