File indexing completed on 2025-01-19 05:21:27

 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /** Zend_Search_Lucene_Index_TermsStream_Interface */
 // require_once 'Zend/Search/Lucene/Index/TermsStream/Interface.php';
 
 
 /**
  * @category   Zend
  * @package    Zend_Search_Lucene
  * @subpackage Index
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Search_Lucene_TermStreamsPriorityQueue implements Zend_Search_Lucene_Index_TermsStream_Interface
 {
     /**
      * Array of term streams (Zend_Search_Lucene_Index_TermsStream_Interface objects)
      *
      * @var array
      */
     protected $_termStreams;
 
     /**
      * Terms stream queue
      *
      * @var Zend_Search_Lucene_Index_TermsPriorityQueue
      */
     protected $_termsStreamQueue = null;
 
     /**
      * Last Term in a terms stream
      *
      * @var Zend_Search_Lucene_Index_Term
      */
     protected $_lastTerm = null;
 
 
     /**
      * Object constructor
      *
      * @param array $termStreams  array of term streams (Zend_Search_Lucene_Index_TermsStream_Interface objects)
      */
     public function __construct(array $termStreams)
     {
         $this->_termStreams = $termStreams;
 
         $this->resetTermsStream();
     }
 
     /**
      * Reset terms stream.
      */
     public function resetTermsStream()
     {
         /** Zend_Search_Lucene_Index_TermsPriorityQueue */
         // require_once 'Zend/Search/Lucene/Index/TermsPriorityQueue.php';
 
         $this->_termsStreamQueue = new Zend_Search_Lucene_Index_TermsPriorityQueue();
 
         foreach ($this->_termStreams as $termStream) {
             $termStream->resetTermsStream();
 
             // Skip "empty" containers
             if ($termStream->currentTerm() !== null) {
                 $this->_termsStreamQueue->put($termStream);
             }
         }
 
         $this->nextTerm();
     }
 
     /**
      * Skip terms stream up to the specified term preffix.
      *
      * Prefix contains fully specified field info and portion of searched term
      *
      * @param Zend_Search_Lucene_Index_Term $prefix
      */
     public function skipTo(Zend_Search_Lucene_Index_Term $prefix)
     {
         $this->_termsStreamQueue = new Zend_Search_Lucene_Index_TermsPriorityQueue();
 
         foreach ($this->_termStreams as $termStream) {
             $termStream->skipTo($prefix);
 
             if ($termStream->currentTerm() !== null) {
                 $this->_termsStreamQueue->put($termStream);
             }
         }
 
         return $this->nextTerm();
     }
 
     /**
      * Scans term streams and returns next term
      *
      * @return Zend_Search_Lucene_Index_Term|null
      */
     public function nextTerm()
     {
         while (($termStream = $this->_termsStreamQueue->pop()) !== null) {
             if ($this->_termsStreamQueue->top() === null ||
                 $this->_termsStreamQueue->top()->currentTerm()->key() !=
                             $termStream->currentTerm()->key()) {
                 // We got new term
                 $this->_lastTerm = $termStream->currentTerm();
 
                 if ($termStream->nextTerm() !== null) {
                     // Put segment back into the priority queue
                     $this->_termsStreamQueue->put($termStream);
                 }
 
                 return $this->_lastTerm;
             }
 
             if ($termStream->nextTerm() !== null) {
                 // Put segment back into the priority queue
                 $this->_termsStreamQueue->put($termStream);
             }
         }
 
         // End of stream
         $this->_lastTerm = null;
 
         return null;
     }
 
     /**
      * Returns term in current position
      *
      * @return Zend_Search_Lucene_Index_Term|null
      */
     public function currentTerm()
     {
         return $this->_lastTerm;
     }
 
     /**
      * Close terms stream
      *
      * Should be used for resources clean up if stream is not read up to the end
      */
     public function closeTermsStream()
     {
         while (($termStream = $this->_termsStreamQueue->pop()) !== null) {
             $termStream->closeTermsStream();
         }
 
         $this->_termsStreamQueue = null;
         $this->_lastTerm         = null;
     }
 }