<?php
/*
	+-----------------------------------------------------------------------------+
	| ILIAS open source                                                           |
	+-----------------------------------------------------------------------------+
	| Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
	|                                                                             |
	| This program is free software; you can redistribute it and/or               |
	| modify it under the terms of the GNU General Public License                 |
	| as published by the Free Software Foundation; either version 2              |
	| of the License, or (at your option) any later version.                      |
	|                                                                             |
	| This program is distributed in the hope that it will be useful,             |
	| but WITHOUT ANY WARRANTY; without even the implied warranty of              |
	| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
	| GNU General Public License for more details.                                |
	|                                                                             |
	| You should have received a copy of the GNU General Public License           |
	| along with this program; if not, write to the Free Software                 |
	| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
	+-----------------------------------------------------------------------------+
*/

include_once './Services/Search/classes/Lucene/class.ilLuceneQueryParser.php';
include_once './Services/Search/classes/Lucene/class.ilLuceneAdvancedSearchFields.php';

/** 
* 
* 
* @author Stefan Meyer <meyer@leifos.com>
* @version $Id$
* 
*
* @ingroup ServicesSearch
*/
class ilLuceneAdvancedQueryParser extends ilLuceneQueryParser
{
	protected $field_definition = null;
	protected $query_data = array();

	/**
	 * Constructor
	 */
	public function __construct($a_query_data)
	{
		parent::__construct('');
		
		$this->field_definition = ilLuceneAdvancedSearchFields::getInstance();
		$this->query_data = $a_query_data;
	}
	
	/**
	 * Get field definition settings
	 */
	public function getFieldDefinition()
	{
		return $this->field_definition;
	}
	
	public function getQueryData()
	{
		return $this->query_data ? $this->query_data : array();
	}
	
	public function parse()
	{
		foreach($this->getQueryData() as $field => $query)
		{
			if(!trim($query))
			{
				continue;
			}
			$parsed = $this->getFieldDefinition()->parseFieldQuery($field,$query);
			if(strlen($parsed))
			{
				$this->parsed_query .= " +(";
				$this->parsed_query .= $parsed;
				$this->parsed_query .= ") ";
			}
		}
		return true;
	}	
}
?>
