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doctrine2/lib/Doctrine/Query/Where.php

177 lines
6.6 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.com>.
*/
Doctrine::autoload('Doctrine_Query_Condition');
/**
* Doctrine_Query_Where
*
* @package Doctrine
* @subpackage Query
* @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>
*/
class Doctrine_Query_Where extends Doctrine_Query_Condition
{
public function load($where)
{
$where = Doctrine_Tokenizer::bracketTrim(trim($where));
$conn = $this->query->getConnection();
$terms = Doctrine_Tokenizer::sqlExplode($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) {
$terms = Doctrine_Tokenizer::sqlExplode($where, array('=', '<', '<>', '>', '!='));
}
if (count($terms) > 1) {
$first = array_shift($terms);
$value = array_pop($terms);
$operator = trim(substr($where, strlen($first), -strlen($value)));
$table = null;
$field = null;
if (strpos($first, "'") === false && strpos($first, '(') === false) {
// normal field reference found
$a = explode('.', $first);
$field = array_pop($a);
$reference = implode('.', $a);
if (empty($reference)) {
$map = $this->query->getRootDeclaration();
$alias = $this->query->getTableAlias($this->query->getRootAlias());
$table = $map['table'];
} else {
$map = $this->query->load($reference, false);
$alias = $this->query->getTableAlias($reference);
$table = $map['table'];
}
if ($this->query->getType() === Doctrine_Query::SELECT) {
$first = $conn->quoteIdentifier($alias)
. '.'
. $conn->quoteIdentifier($table->getColumnName($field));
} else {
$first = $conn->quoteIdentifier($table->getColumnName($field));
}
} else {
$first = $this->query->parseClause($first);
}
$sql = $first . ' ' . $operator . ' ' . $this->parseValue($value, $table, $field);
return $sql;
} else {
}
}
public function parseValue($value, Doctrine_Table $table = null, $field = null)
{
if (substr($value, 0, 1) == '(') {
// trim brackets
$trimmed = Doctrine_Tokenizer::bracketTrim($value);
if (substr($trimmed, 0, 4) == 'FROM' ||
substr($trimmed, 0, 6) == 'SELECT') {
// subquery found
$q = new Doctrine_Query();
$value = '(' . $q->isSubquery(true)->parseQuery($trimmed)->getQuery() . ')';
} elseif (substr($trimmed, 0, 4) == 'SQL:') {
$value = '(' . substr($trimmed, 4) . ')';
} else {
// simple in expression found
$e = Doctrine_Tokenizer::sqlExplode($trimmed, ',');
$value = array();
$index = false;
foreach ($e as $part) {
if (isset($table) && isset($field)) {
$index = $table->enumIndex($field, trim($part, "'"));
}
if ($index !== false) {
$value[] = $index;
} else {
$value[] = $this->parseLiteralValue($part);
}
}
$value = '(' . implode(', ', $value) . ')';
}
} elseif (substr($value, 0, 1) == ':' || $value === '?') {
// placeholder found
if (isset($table) && isset($field) && $table->getTypeOf($field) == 'enum') {
$this->query->addEnumParam($value, $table, $field);
} else {
$this->query->addEnumParam($value, null, null);
}
} else {
$enumIndex = false;
if (isset($table) && isset($field)) {
// check if value is enumerated value
$enumIndex = $table->enumIndex($field, trim($value, "'"));
}
if ($enumIndex !== false) {
$value = $enumIndex;
} else {
$value = $this->parseLiteralValue($value);
}
}
return $value;
}
/**
* 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');
}
$sub = Doctrine_Tokenizer::bracketTrim(substr($where, $pos));
return $operator . ' (' . $this->query->createSubquery()->parseQuery($sub, false)->getQuery() . ')';
}
}