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doctrine2/lib/Doctrine/Query/From.php

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<?php
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/*
* $Id$
*
* 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::autoload("Doctrine_Query_Part");
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/**
* Doctrine_Query_From
*
* @package Doctrine
* @subpackage Query
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
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class Doctrine_Query_From extends Doctrine_Query_Part
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{
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/**
* DQL FROM PARSER
* parses the FROM part of the query string
*
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* @param string $str
* @return void
*/
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public function parse($str)
{
$str = trim($str);
$parts = $this->_tokenizer->bracketExplode($str, 'JOIN');
$operator = false;
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switch (trim($parts[0])) {
case 'INNER':
$operator = ':';
case 'LEFT':
array_shift($parts);
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break;
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}
$last = '';
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foreach ($parts as $k => $part) {
$part = trim($part);
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if (empty($part)) {
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continue;
}
$e = explode(' ', $part);
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if (end($e) == 'INNER' || end($e) == 'LEFT') {
$last = array_pop($e);
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}
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$part = implode(' ', $e);
foreach ($this->_tokenizer->bracketExplode($part, ',') as $reference) {
$reference = trim($reference);
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$e = explode(' ', $reference);
$e2 = explode('.', $e[0]);
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if ($operator) {
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$e[0] = array_shift($e2) . $operator . implode('.', $e2);
}
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$table = $this->query->load(implode(' ', $e));
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}
$operator = ($last == 'INNER') ? ':' : '.';
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}
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return null;
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}
}