145 lines
3.7 KiB
PHP
Executable File
145 lines
3.7 KiB
PHP
Executable File
<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
* @version $Id: Term.php 20096 2010-01-06 02:05:09Z bkarwin $
|
|
*/
|
|
|
|
|
|
/**
|
|
* A Term represents a word from text. This is the unit of search. It is
|
|
* composed of two elements, the text of the word, as a string, and the name of
|
|
* the field that the text occured in, an interned string.
|
|
*
|
|
* Note that terms may represent more than words from text fields, but also
|
|
* things like dates, email addresses, urls, etc.
|
|
*
|
|
* @category Zend
|
|
* @package Zend_Search_Lucene
|
|
* @subpackage Index
|
|
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
*/
|
|
class Zend_Search_Lucene_Index_Term
|
|
{
|
|
/**
|
|
* Field name or field number (depending from context)
|
|
*
|
|
* @var mixed
|
|
*/
|
|
public $field;
|
|
|
|
/**
|
|
* Term value
|
|
*
|
|
* @var string
|
|
*/
|
|
public $text;
|
|
|
|
|
|
/**
|
|
* Object constructor
|
|
*/
|
|
public function __construct($text, $field = null)
|
|
{
|
|
$this->field = ($field === null)? Zend_Search_Lucene::getDefaultSearchField() : $field;
|
|
$this->text = $text;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns term key
|
|
*
|
|
* @return string
|
|
*/
|
|
public function key()
|
|
{
|
|
return $this->field . chr(0) . $this->text;
|
|
}
|
|
|
|
/**
|
|
* Get term prefix
|
|
*
|
|
* @param string $str
|
|
* @param integer $length
|
|
* @return string
|
|
*/
|
|
public static function getPrefix($str, $length)
|
|
{
|
|
$prefixBytes = 0;
|
|
$prefixChars = 0;
|
|
while ($prefixBytes < strlen($str) && $prefixChars < $length) {
|
|
$charBytes = 1;
|
|
if ((ord($str[$prefixBytes]) & 0xC0) == 0xC0) {
|
|
$charBytes++;
|
|
if (ord($str[$prefixBytes]) & 0x20 ) {
|
|
$charBytes++;
|
|
if (ord($str[$prefixBytes]) & 0x10 ) {
|
|
$charBytes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($prefixBytes + $charBytes > strlen($str)) {
|
|
// wrong character
|
|
break;
|
|
}
|
|
|
|
$prefixChars++;
|
|
$prefixBytes += $charBytes;
|
|
}
|
|
|
|
return substr($str, 0, $prefixBytes);
|
|
}
|
|
|
|
/**
|
|
* Get UTF-8 string length
|
|
*
|
|
* @param string $str
|
|
* @return string
|
|
*/
|
|
public static function getLength($str)
|
|
{
|
|
$bytes = 0;
|
|
$chars = 0;
|
|
while ($bytes < strlen($str)) {
|
|
$charBytes = 1;
|
|
if ((ord($str[$bytes]) & 0xC0) == 0xC0) {
|
|
$charBytes++;
|
|
if (ord($str[$bytes]) & 0x20 ) {
|
|
$charBytes++;
|
|
if (ord($str[$bytes]) & 0x10 ) {
|
|
$charBytes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($bytes + $charBytes > strlen($str)) {
|
|
// wrong character
|
|
break;
|
|
}
|
|
|
|
$chars++;
|
|
$bytes += $charBytes;
|
|
}
|
|
|
|
return $chars;
|
|
}
|
|
}
|
|
|