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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @package Zend_Search
*/
namespace ZendSearch\Lucene\Analysis;
/**
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Analysis
*/
class Token
{
/**
* The text of the term.
*
* @var string
*/
private $_termText;
/**
* Start in source text.
*
* @var integer
*/
private $_startOffset;
/**
* End in source text
*
* @var integer
*/
private $_endOffset;
/**
* The position of this token relative to the previous Token.
*
* The default value is one.
*
* Some common uses for this are:
* Set it to zero to put multiple terms in the same position. This is
* useful if, e.g., a word has multiple stems. Searches for phrases
* including either stem will match. In this case, all but the first stem's
* increment should be set to zero: the increment of the first instance
* should be one. Repeating a token with an increment of zero can also be
* used to boost the scores of matches on that token.
*
* Set it to values greater than one to inhibit exact phrase matches.
* If, for example, one does not want phrases to match across removed stop
* words, then one could build a stop word filter that removes stop words and
* also sets the increment to the number of stop words removed before each
* non-stop word. Then exact phrase queries will only match when the terms
* occur with no intervening stop words.
*
* @var integer
*/
private $_positionIncrement;
/**
* Object constructor
*
* @param string $text
* @param integer $start
* @param integer $end
* @param string $type
*/
public function __construct($text, $start, $end)
{
$this->_termText = $text;
$this->_startOffset = $start;
$this->_endOffset = $end;
$this->_positionIncrement = 1;
}
/**
* positionIncrement setter
*
* @param integer $positionIncrement
*/
public function setPositionIncrement($positionIncrement)
{
$this->_positionIncrement = $positionIncrement;
}
/**
* Returns the position increment of this Token.
*
* @return integer
*/
public function getPositionIncrement()
{
return $this->_positionIncrement;
}
/**
* Returns the Token's term text.
*
* @return string
*/
public function getTermText()
{
return $this->_termText;
}
/**
* Returns this Token's starting offset, the position of the first character
* corresponding to this token in the source text.
*
* Note:
* The difference between getEndOffset() and getStartOffset() may not be equal
* to strlen(Zend_Search_Lucene_Analysis_Token::getTermText()), as the term text may have been altered
* by a stemmer or some other filter.
*
* @return integer
*/
public function getStartOffset()
{
return $this->_startOffset;
}
/**
* Returns this Token's ending offset, one greater than the position of the
* last character corresponding to this token in the source text.
*
* @return integer
*/
public function getEndOffset()
{
return $this->_endOffset;
}
}