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