final move of files

[web.mtrack] / Zend / Search / Lucene / Search / Weight / Term.php

diff --git a/Zend/Search/Lucene/Search/Weight/Term.php b/Zend/Search/Lucene/Search/Weight/Term.php
new file mode 100644 (file)
index 0000000..13585e3
--- /dev/null
+++ b/Zend/Search/Lucene/Search/Weight/Term.php
@@ -0,0 +1,125 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Search_Lucene
+ * @subpackage Search
+ * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Term.php 16541 2009-07-07 06:59:03Z bkarwin $
+ */
+
+
+/** Zend_Search_Lucene_Search_Weight */
+require_once 'Zend/Search/Lucene/Search/Weight.php';
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Search_Lucene
+ * @subpackage Search
+ * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Search_Lucene_Search_Weight_Term extends Zend_Search_Lucene_Search_Weight
+{
+    /**
+     * IndexReader.
+     *
+     * @var Zend_Search_Lucene_Interface
+     */
+    private $_reader;
+
+    /**
+     * Term
+     *
+     * @var Zend_Search_Lucene_Index_Term
+     */
+    private $_term;
+
+    /**
+     * The query that this concerns.
+     *
+     * @var Zend_Search_Lucene_Search_Query
+     */
+    private $_query;
+
+    /**
+     * Score factor
+     *
+     * @var float
+     */
+    private $_idf;
+
+    /**
+     * Query weight
+     *
+     * @var float
+     */
+    private $_queryWeight;
+
+
+    /**
+     * Zend_Search_Lucene_Search_Weight_Term constructor
+     * reader - index reader
+     *
+     * @param Zend_Search_Lucene_Index_Term   $term
+     * @param Zend_Search_Lucene_Search_Query $query
+     * @param Zend_Search_Lucene_Interface    $reader
+     */
+    public function __construct(Zend_Search_Lucene_Index_Term   $term,
+                                Zend_Search_Lucene_Search_Query $query,
+                                Zend_Search_Lucene_Interface    $reader)
+    {
+        $this->_term   = $term;
+        $this->_query  = $query;
+        $this->_reader = $reader;
+    }
+
+
+    /**
+     * The sum of squared weights of contained query clauses.
+     *
+     * @return float
+     */
+    public function sumOfSquaredWeights()
+    {
+        // compute idf
+        $this->_idf = $this->_reader->getSimilarity()->idf($this->_term, $this->_reader);
+
+        // compute query weight
+        $this->_queryWeight = $this->_idf * $this->_query->getBoost();
+
+        // square it
+        return $this->_queryWeight * $this->_queryWeight;
+    }
+
+
+    /**
+     * Assigns the query normalization factor to this.
+     *
+     * @param float $queryNorm
+     */
+    public function normalize($queryNorm)
+    {
+        $this->_queryNorm = $queryNorm;
+
+        // normalize query weight
+        $this->_queryWeight *= $queryNorm;
+
+        // idf for documents
+        $this->_value = $this->_queryWeight * $this->_idf;
+    }
+}
+