<?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>.
 */

/**
 * Primary = PathExpression | Atom | "(" Expression ")" | Function |
 *     AggregateExpression
 *
 * @package     Doctrine
 * @subpackage  Query
 * @author      Janne Vanhala <jpvanhal@cc.hut.fi>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        http://www.phpdoctrine.org
 * @since       1.0
 * @version     $Revision$
 */
class Doctrine_Query_Production_Primary extends Doctrine_Query_Production
{
    public function execute(array $params = array())
    {
        switch ($this->_parser->lookahead['type']) {
            case Doctrine_Query_Token::T_IDENTIFIER:
                $nextToken = $this->_parser->getScanner()->peek();

                if ($nextToken['value'] === '(') {
                    $this->Function();
                } else {
                    $this->PathExpression();
                }
            break;
            case Doctrine_Query_Token::T_STRING:
            case Doctrine_Query_Token::T_NUMERIC:
            case Doctrine_Query_Token::T_INPUT_PARAMETER:
                $this->Atom();
            break;
            case Doctrine_Query_Token::T_AVG:
            case Doctrine_Query_Token::T_COUNT:
            case Doctrine_Query_Token::T_MAX:
            case Doctrine_Query_Token::T_MIN:
            case Doctrine_Query_Token::T_SUM:
                $this->AggregateExpression();
            break;
            case Doctrine_Query_Token::T_NONE:
                if ($this->_isNextToken('(')) {
                    $this->_parser->match('(');
                    $this->Expression();
                    $this->_parser->match(')');
                    break;
                }
            default:
                $this->_parser->logError();
        }
    }
}