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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to version 1.0 of the Zend Framework
* license, that is bundled with this package in the file LICENSE, and
* is available through the world-wide-web at the following URL:
* http://www.zend.com/license/framework/1_0.txt. If you did not receive
* a copy of the Zend Framework license and are unable to obtain it
* through the world-wide-web, please send a note to license@zend.com
* so we can mail you a copy immediately.
*
* @package Zend_Search_Lucene
* @subpackage Search
* @copyright Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
*/
/**
* @package Zend_Search_Lucene
* @subpackage Search
* @copyright Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
*/
abstract class Zend_Search_Lucene_Search_Query
{
/**
* query boost factor
*
* @var float
*/
private $_boost = 1.0;
/**
* Query weight
*
* @var Zend_Search_Lucene_Search_Weight
*/
protected $_weight;
/**
* Gets the boost for this clause. Documents matching
* this clause will (in addition to the normal weightings) have their score
* multiplied by boost. The boost is 1.0 by default.
*
* @return float
*/
public function getBoost()
{
return $this->_boost;
}
/**
* Sets the boost for this query clause to $boost.
*
* @param float $boost
*/
public function setBoost($boost)
{
$this->_boost = $boost;
}
/**
* Score specified document
*
* @param integer $docId
* @param Zend_Search_Lucene $reader
* @return float
*/
abstract public function score($docId, $reader);
/**
* Constructs an appropriate Weight implementation for this query.
*
* @param Zend_Search_Lucene $reader
* @return Zend_Search_Lucene_Search_Weight
*/
abstract protected function _createWeight($reader);
/**
* Constructs an initializes a Weight for a query.
*
* @param Zend_Search_Lucene $reader
*/
protected function _initWeight($reader)
{
$this->_weight = $this->_createWeight($reader);
$sum = $this->_weight->sumOfSquaredWeights();
$queryNorm = $reader->getSimilarity()->queryNorm($sum);
$this->_weight->normalize($queryNorm);
}
}
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