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<?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 Index
* @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: DocumentWriter.php 18947 2009-11-12 11:57:17Z alexander $
*/
/** Zend_Search_Lucene_Index_SegmentWriter */
require_once 'Zend/Search/Lucene/Index/SegmentWriter.php';
/**
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Index
* @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_Index_SegmentWriter_DocumentWriter extends Zend_Search_Lucene_Index_SegmentWriter
{
/**
* Term Dictionary
* Array of the Zend_Search_Lucene_Index_Term objects
* Corresponding Zend_Search_Lucene_Index_TermInfo object stored in the $_termDictionaryInfos
*
* @var array
*/
protected $_termDictionary;
/**
* Documents, which contain the term
*
* @var array
*/
protected $_termDocs;
/**
* Object constructor.
*
* @param Zend_Search_Lucene_Storage_Directory $directory
* @param string $name
*/
public function __construct(Zend_Search_Lucene_Storage_Directory $directory, $name)
{
parent::__construct($directory, $name);
$this->_termDocs = array();
$this->_termDictionary = array();
}
/**
* Adds a document to this segment.
*
* @param Zend_Search_Lucene_Document $document
* @throws Zend_Search_Lucene_Exception
*/
public function addDocument(Zend_Search_Lucene_Document $document)
{
/** Zend_Search_Lucene_Search_Similarity */
require_once 'Zend/Search/Lucene/Search/Similarity.php';
$storedFields = array();
$docNorms = array();
$similarity = Zend_Search_Lucene_Search_Similarity::getDefault();
foreach ($document->getFieldNames() as $fieldName) {
$field = $document->getField($fieldName);
$this->addField($field);
if ($field->storeTermVector) {
/**
* @todo term vector storing support
*/
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Store term vector functionality is not supported yet.');
}
if ($field->isIndexed) {
if ($field->isTokenized) {
/** Zend_Search_Lucene_Analysis_Analyzer */
require_once 'Zend/Search/Lucene/Analysis/Analyzer.php';
$analyzer = Zend_Search_Lucene_Analysis_Analyzer::getDefault();
$analyzer->setInput($field->value, $field->encoding);
$position = 0;
$tokenCounter = 0;
while (($token = $analyzer->nextToken()) !== null) {
$tokenCounter++;
$term = new Zend_Search_Lucene_Index_Term($token->getTermText(), $field->name);
$termKey = $term->key();
if (!isset($this->_termDictionary[$termKey])) {
// New term
$this->_termDictionary[$termKey] = $term;
$this->_termDocs[$termKey] = array();
$this->_termDocs[$termKey][$this->_docCount] = array();
} else if (!isset($this->_termDocs[$termKey][$this->_docCount])) {
// Existing term, but new term entry
$this->_termDocs[$termKey][$this->_docCount] = array();
}
$position += $token->getPositionIncrement();
$this->_termDocs[$termKey][$this->_docCount][] = $position;
}
$docNorms[$field->name] = chr($similarity->encodeNorm( $similarity->lengthNorm($field->name,
$tokenCounter)*
$document->boost*
$field->boost ));
} else {
$term = new Zend_Search_Lucene_Index_Term($field->getUtf8Value(), $field->name);
$termKey = $term->key();
if (!isset($this->_termDictionary[$termKey])) {
// New term
$this->_termDictionary[$termKey] = $term;
$this->_termDocs[$termKey] = array();
$this->_termDocs[$termKey][$this->_docCount] = array();
} else if (!isset($this->_termDocs[$termKey][$this->_docCount])) {
// Existing term, but new term entry
$this->_termDocs[$termKey][$this->_docCount] = array();
}
$this->_termDocs[$termKey][$this->_docCount][] = 0; // position
$docNorms[$field->name] = chr($similarity->encodeNorm( $similarity->lengthNorm($field->name, 1)*
$document->boost*
$field->boost ));
}
}
if ($field->isStored) {
$storedFields[] = $field;
}
}
foreach ($this->_fields as $fieldName => $field) {
if (!$field->isIndexed) {
continue;
}
if (!isset($this->_norms[$fieldName])) {
$this->_norms[$fieldName] = str_repeat(chr($similarity->encodeNorm( $similarity->lengthNorm($fieldName, 0) )),
$this->_docCount);
}
if (isset($docNorms[$fieldName])){
$this->_norms[$fieldName] .= $docNorms[$fieldName];
} else {
$this->_norms[$fieldName] .= chr($similarity->encodeNorm( $similarity->lengthNorm($fieldName, 0) ));
}
}
$this->addStoredFields($storedFields);
}
/**
* Dump Term Dictionary (.tis) and Term Dictionary Index (.tii) segment files
*/
protected function _dumpDictionary()
{
ksort($this->_termDictionary, SORT_STRING);
$this->initializeDictionaryFiles();
foreach ($this->_termDictionary as $termId => $term) {
$this->addTerm($term, $this->_termDocs[$termId]);
}
$this->closeDictionaryFiles();
}
/**
* Close segment, write it to disk and return segment info
*
* @return Zend_Search_Lucene_Index_SegmentInfo
*/
public function close()
{
if ($this->_docCount == 0) {
return null;
}
$this->_dumpFNM();
$this->_dumpDictionary();
$this->_generateCFS();
/** Zend_Search_Lucene_Index_SegmentInfo */
require_once 'Zend/Search/Lucene/Index/SegmentInfo.php';
return new Zend_Search_Lucene_Index_SegmentInfo($this->_directory,
$this->_name,
$this->_docCount,
-1,
null,
true,
true);
}
}
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