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doctrine2/lib/Doctrine/Query/Production/PathExpression.php

173 lines
6.0 KiB
PHP

<?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>.
*/
/**
* PathExpression = identifier { "." identifier }
*
* @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
* @version $Revision$
*/
class Doctrine_Query_Production_PathExpression extends Doctrine_Query_Production
{
protected $_identifiers = array();
protected $_fieldName;
protected $_componentAlias;
public function syntax($paramHolder)
{
$this->_parser->match(Doctrine_Query_Token::T_IDENTIFIER);
$this->_identifiers[] = $this->_parser->token['value'];
while ($this->_isNextToken('.')) {
$this->_parser->match('.');
$this->_parser->match(Doctrine_Query_Token::T_IDENTIFIER);
$this->_identifiers[] = $this->_parser->token['value'];
}
$this->_fieldName = array_pop($this->_identifiers);
}
public function semantical($paramHolder)
{
$parserResult = $this->_parser->getParserResult();
$classMetadata = null;
if (($l = count($this->_identifiers)) == 0) {
// No metadata selection until now. We might need to deal with:
// DELETE FROM Obj alias WHERE field = X
$queryComponents = $parserResult->getQueryComponents();
// Check if we have more than one queryComponent defined
if (count($queryComponents) != 2) {
$this->_parser->semanticalError("Undefined component alias for field '{$this->_fieldName}'", $this->_parser->token);
}
// Retrieve ClassMetadata
$k = array_keys($queryComponents);
$this->_componentAlias = $k[1];
$classMetadata = $queryComponents[$this->_componentAlias]['metadata'];
} else {
$this->_componentAlias = $path = $this->_identifiers[0];
$queryComponent = $parserResult->getQueryComponent($path);
// We should have a semantical error if the queryComponent does not exists yet
if ($queryComponent === null) {
$this->_parser->semanticalError("Undefined component alias for '{$path}'", $this->_parser->token);
}
// Initializing ClassMetadata
$classMetadata = $queryComponent['metadata'];
// Looping through relations
for ($i = 1; $i < $l; $i++) {
$relationName = $this->_identifiers[$i];
$path .= '.' . $relationName;
if ( ! $classMetadata->hasRelation($relationName)) {
$className = $classMetadata->getClassName();
$this->_parser->semanticalError(
"Relation '{$relationName}' does not exist in component '{$className}' when trying to get the path '{$path}'",
$this->_parser->token
);
}
// We inspect for queryComponent of relations, since we are using them
if ( ! $parserResult->hasQueryComponent($path)) {
$this->_parser->semanticalError("Cannot use the path '{$path}' without defining it in FROM.", $this->_parser->token);
}
// Assigning new componentAlias, queryComponent and classMetadata
$this->_componentAlias = $path;
$queryComponent = $parserResult->getQueryComponent($path);
$classMetadata = $queryComponent['metadata'];
}
}
// Now we inspect for field existance
if ( ! $classMetadata->hasField($this->_fieldName)) {
$className = $classMetadata->getClassName();
$this->_parser->semanticalError("Field '{$this->_fieldName}' does not exist in component '{$className}'", $this->_parser->token);
}
}
public function buildSql()
{
// Basic handy variables
$parserResult = $this->_parser->getParserResult();
// Retrieving connection
$manager = Doctrine_EntityManagerFactory::getManager();
$conn = $manager->getConnection();
// Looking for queryComponent to fetch
$queryComponent = $parserResult->getQueryComponent($this->_componentAlias);
// Generating the SQL piece
$str = $parserResult->getTableAliasFromComponentAlias($this->_componentAlias) . '.'
. $queryComponent['metadata']->getColumnName($this->_fieldName);
return $conn->quoteIdentifier($str);
}
/**
* Visitor support
*
* @param object $visitor
*/
public function accept($visitor)
{
$visitor->visitPathExpression($this);
}
/* Getters */
public function getIdentifiers()
{
return $this->_identifiers;
}
public function getFieldName()
{
return $this->_fieldName;
}
public function getComponentAlias()
{
return $this->_componentAlias;
}
}