<?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.doctrine-project.org>.

 */

namespace Doctrine\ORM\Query\Expr;

/**

 * Expression class for building DQL and parts

 *

 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL

 * @link    www.doctrine-project.org

 * @since   2.0

 * @version $Revision$

 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>

 * @author  Jonathan Wage <jonwage@gmail.com>

 * @author  Roman Borschel <roman@code-factory.org>

 */

class Composite extends Base

{

    public function __toString()

    {

        if ($this->count() === 1) {

            return (string) $this->_parts[0];

        }

        $components = array();

        foreach ($this->_parts as $part) {

            $components[] = $this->processQueryPart($part);

        }

        return implode($this->_separator, $components);

    }

    private function processQueryPart($part)

    {

        $queryPart = (string) $part;

        if (is_object($part) && $part instanceof self && $part->count() > 1) {

            return $this->_preSeparator . $queryPart . $this->_postSeparator;

        }

        // Fixes DDC-1237: User may have added a where item containing nested expression (with "OR" or "AND")

        if (mb_stripos($queryPart, ' OR ') !== false || mb_stripos($queryPart, ' AND ') !== false) {

            return $this->_preSeparator . $queryPart . $this->_postSeparator;

        }

        return $queryPart;

    }

}