final move of files

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

diff --git a/Zend/Search/Lucene/Search/Weight/MultiTerm.php b/Zend/Search/Lucene/Search/Weight/MultiTerm.php
new file mode 100644 (file)
index 0000000..445e57b
--- /dev/null
+++ b/Zend/Search/Lucene/Search/Weight/MultiTerm.php
@@ -0,0 +1,138 @@
+<?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: MultiTerm.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_MultiTerm extends Zend_Search_Lucene_Search_Weight
+{
+    /**
+     * IndexReader.
+     *
+     * @var Zend_Search_Lucene_Interface
+     */
+    private $_reader;
+
+    /**
+     * The query that this concerns.
+     *
+     * @var Zend_Search_Lucene_Search_Query
+     */
+    private $_query;
+
+    /**
+     * Query terms weights
+     * Array of Zend_Search_Lucene_Search_Weight_Term
+     *
+     * @var array
+     */
+    private $_weights;
+
+
+    /**
+     * Zend_Search_Lucene_Search_Weight_MultiTerm constructor
+     * query - the query that this concerns.
+     * reader - index reader
+     *
+     * @param Zend_Search_Lucene_Search_Query $query
+     * @param Zend_Search_Lucene_Interface    $reader
+     */
+    public function __construct(Zend_Search_Lucene_Search_Query $query,
+                                Zend_Search_Lucene_Interface    $reader)
+    {
+        $this->_query   = $query;
+        $this->_reader  = $reader;
+        $this->_weights = array();
+
+        $signs = $query->getSigns();
+
+        foreach ($query->getTerms() as $id => $term) {
+            if ($signs === null || $signs[$id] === null || $signs[$id]) {
+                $this->_weights[$id] = new Zend_Search_Lucene_Search_Weight_Term($term, $query, $reader);
+                $query->setWeight($id, $this->_weights[$id]);
+            }
+        }
+    }
+
+
+    /**
+     * The weight for this query
+     * Standard Weight::$_value is not used for boolean queries
+     *
+     * @return float
+     */
+    public function getValue()
+    {
+        return $this->_query->getBoost();
+    }
+
+
+    /**
+     * The sum of squared weights of contained query clauses.
+     *
+     * @return float
+     */
+    public function sumOfSquaredWeights()
+    {
+        $sum = 0;
+        foreach ($this->_weights as $weight) {
+            // sum sub weights
+            $sum += $weight->sumOfSquaredWeights();
+        }
+
+        // boost each sub-weight
+        $sum *= $this->_query->getBoost() * $this->_query->getBoost();
+
+        // check for empty query (like '-something -another')
+        if ($sum == 0) {
+            $sum = 1.0;
+        }
+        return $sum;
+    }
+
+
+    /**
+     * Assigns the query normalization factor to this.
+     *
+     * @param float $queryNorm
+     */
+    public function normalize($queryNorm)
+    {
+        // incorporate boost
+        $queryNorm *= $this->_query->getBoost();
+
+        foreach ($this->_weights as $weight) {
+            $weight->normalize($queryNorm);
+        }
+    }
+}
+
+