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authorxue <>2006-05-09 12:11:38 +0000
committerxue <>2006-05-09 12:11:38 +0000
commitf4de82bcdafba51e4eed9cae6b2d3e5375ffd115 (patch)
tree08f98e1763e87f0639961c6da33224082345c7c3 /demos/quickstart/protected/index/Zend/Search/Lucene/Analysis/Analyzer.php
parent92dca3315f083f00dcff610ea207af52284d0616 (diff)
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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 Analysis
+ * @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
+ */
+
+
+/** Zend_Search_Lucene_Analysis_Token */
+require_once 'Zend/Search/Lucene/Analysis/Token.php';
+
+/** Zend_Search_Lucene_Analysis_Analyzer_Common_Text */
+require_once 'Zend/Search/Lucene/Analysis/Analyzer/Common/Text.php';
+
+/** Zend_Search_Lucene_Analysis_Analyzer_Common_Text_CaseInsensitive */
+require_once 'Zend/Search/Lucene/Analysis/Analyzer/Common/Text/CaseInsensitive.php';
+
+
+
+/**
+ * An Analyzer is used to analyze text.
+ * It thus represents a policy for extracting index terms from text.
+ *
+ * Note:
+ * Lucene Java implementation is oriented to streams. It provides effective work
+ * with a huge documents (more then 20Mb).
+ * But engine itself is not oriented such documents.
+ * Thus Zend_Search_Lucene analysis API works with data strings and sets (arrays).
+ *
+ * @package Zend_Search_Lucene
+ * @subpackage Analysis
+ * @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_Analysis_Analyzer
+{
+ /**
+ * The Analyzer implementation used by default.
+ *
+ * @var Zend_Search_Lucene_Analysis_Analyzer
+ */
+ static private $_defaultImpl;
+
+ /**
+ * Tokenize text to a terms
+ * Returns array of Zend_Search_Lucene_Analysis_Token objects
+ *
+ * @param string $data
+ * @return array
+ */
+ abstract public function tokenize($data);
+
+
+ /**
+ * Set the default Analyzer implementation used by indexing code.
+ *
+ * @param Zend_Search_Lucene_Analysis_Analyzer $similarity
+ */
+ static public function setDefault(Zend_Search_Lucene_Analysis_Analyzer $analyzer)
+ {
+ self::$_defaultImpl = $analyzer;
+ }
+
+
+ /**
+ * Return the default Analyzer implementation used by indexing code.
+ *
+ * @return Zend_Search_Lucene_Analysis_Analyzer
+ */
+ static public function getDefault()
+ {
+ if (!self::$_defaultImpl instanceof Zend_Search_Lucene_Analysis_Analyzer) {
+ self::$_defaultImpl = new Zend_Search_Lucene_Analysis_Analyzer_Common_Text_CaseInsensitive();
+ }
+
+ return self::$_defaultImpl;
+ }
+
+}
+