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<?php
/*
* $Id: Where.php 6366 2009-09-15 19:44:05Z jwage $
*
* 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>.
*/
/**
* Doctrine_Query_Where
*
* @package Doctrine
* @subpackage Query
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.org
* @since 1.0
* @version $Revision: 6366 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Query_Where extends Doctrine_Query_Condition
{
public function load($where)
{
// Handle operator ("AND" | "OR"), reducing overhead of this method processment
$possibleOp = strtolower($where);
if ($possibleOp == 'and' || $possibleOp == 'or')
{
return $where;
}
$where = $this->_tokenizer->bracketTrim(trim($where));
$conn = $this->query->getConnection();
$terms = $this->_tokenizer->sqlExplode($where);
if (count($terms) > 1) {
if (substr($where, 0, 6) == 'EXISTS') {
return $this->parseExists($where, true);
} elseif (substr($where, 0, 10) == 'NOT EXISTS') {
return $this->parseExists($where, false);
}
}
if (count($terms) < 3) {
$terms = $this->_tokenizer->sqlExplode($where, array('=', '<', '<>', '>', '!='));
}
if (count($terms) > 1) {
$leftExpr = array_shift($terms);
$rightExpr = array_pop($terms);
$operator = trim(substr($where, strlen($leftExpr), -strlen($rightExpr)));
if (strpos($leftExpr, "'") === false && strpos($leftExpr, '(') === false) {
// normal field reference found
$a = explode('.', $leftExpr);
array_pop($a); // Discard the field name (not needed!)
$reference = implode('.', $a);
if (empty($reference)) {
$map = $this->query->getRootDeclaration();
$alias = $this->query->getSqlTableAlias($this->query->getRootAlias());
} else {
$map = $this->query->load($reference, false);
$alias = $this->query->getSqlTableAlias($reference);
}
}
$sql = $this->_buildSql($leftExpr, $operator, $rightExpr);
return $sql;
} else {
return $where;
}
}
protected function _buildSql($leftExpr, $operator, $rightExpr)
{
$leftExprOriginal = $leftExpr;
$leftExpr = $this->query->parseClause($leftExpr);
// BETWEEN operation
if ('BETWEEN' == strtoupper(substr($operator, 0, 7))) {
$midExpr = trim(substr($operator, 7, -3));
$operator = 'BETWEEN ' . $this->query->parseClause($midExpr) . ' AND';
}
// NOT BETWEEN operation
if ('NOT BETWEEN' == strtoupper(substr($operator, 0, 11))) {
$midExpr = trim(substr($operator, 11, -3));
$operator = 'NOT BETWEEN ' . $this->query->parseClause($midExpr) . ' AND';
}
$op = strtolower($operator);
$isInX = ($op == 'in' || $op == 'not in');
// Check if we are not dealing with "obj.field IN :named"
if (substr($rightExpr, 0 , 1) == ':' && $isInX) {
throw new Doctrine_Query_Exception(
'Cannot use ' . $operator . ' with a named parameter in "' .
$leftExprOriginal . ' ' . $operator . ' ' . $rightExpr . '"'
);
}
// Right Expression
$rightExpr = ($rightExpr == '?' && $isInX)
? $this->_buildWhereInArraySqlPart($rightExpr)
: $this->query->parseClause($rightExpr);
return $leftExpr . ' ' . $operator . ' ' . $rightExpr;
}
protected function _buildWhereInArraySqlPart($rightExpr)
{
$params = $this->query->getInternalParams();
$value = array();
for ($i = 0, $l = count($params); $i < $l; $i++) {
if (is_array($params[$i])) {
$value = array_fill(0, count($params[$i]), $rightExpr);
$this->query->adjustProcessedParam($i);
break;
}
}
return '(' . (count($value) > 0 ? implode(', ', $value) : $rightExpr) . ')';
}
/**
* parses an EXISTS expression
*
* @param string $where query where part to be parsed
* @param boolean $negation whether or not to use the NOT keyword
* @return string
*/
public function parseExists($where, $negation)
{
$operator = ($negation) ? 'EXISTS' : 'NOT EXISTS';
$pos = strpos($where, '(');
if ($pos == false) {
throw new Doctrine_Query_Exception('Unknown expression, expected a subquery with () -marks');
}
$sub = $this->_tokenizer->bracketTrim(substr($where, $pos));
$q = $this->query->createSubquery()->parseDqlQuery($sub, false);
$sql = $q->getSqlQuery();
$q->free();
return $operator . ' (' . $sql . ')';
}
}
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