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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 Search
* @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: QueryLexer.php 16971 2009-07-22 18:05:45Z mikaelkael $
*/
/** Zend_Search_Lucene_FSM */
require_once 'Zend/Search/Lucene/FSM.php';
/** Zend_Search_Lucene_Search_QueryParser */
require_once 'Zend/Search/Lucene/Search/QueryToken.php';
/**
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Search
* @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_Search_QueryLexer extends Zend_Search_Lucene_FSM
{
/** State Machine states */
const ST_WHITE_SPACE = 0;
const ST_SYNT_LEXEME = 1;
const ST_LEXEME = 2;
const ST_QUOTED_LEXEME = 3;
const ST_ESCAPED_CHAR = 4;
const ST_ESCAPED_QCHAR = 5;
const ST_LEXEME_MODIFIER = 6;
const ST_NUMBER = 7;
const ST_MANTISSA = 8;
const ST_ERROR = 9;
/** Input symbols */
const IN_WHITE_SPACE = 0;
const IN_SYNT_CHAR = 1;
const IN_LEXEME_MODIFIER = 2;
const IN_ESCAPE_CHAR = 3;
const IN_QUOTE = 4;
const IN_DECIMAL_POINT = 5;
const IN_ASCII_DIGIT = 6;
const IN_CHAR = 7;
const IN_MUTABLE_CHAR = 8;
const QUERY_WHITE_SPACE_CHARS = " \n\r\t";
const QUERY_SYNT_CHARS = ':()[]{}!|&';
const QUERY_MUTABLE_CHARS = '+-';
const QUERY_DOUBLECHARLEXEME_CHARS = '|&';
const QUERY_LEXEMEMODIFIER_CHARS = '~^';
const QUERY_ASCIIDIGITS_CHARS = '0123456789';
/**
* List of recognized lexemes
*
* @var array
*/
private $_lexemes;
/**
* Query string (array of single- or non single-byte characters)
*
* @var array
*/
private $_queryString;
/**
* Current position within a query string
* Used to create appropriate error messages
*
* @var integer
*/
private $_queryStringPosition;
/**
* Recognized part of current lexeme
*
* @var string
*/
private $_currentLexeme;
public function __construct()
{
parent::__construct( array(self::ST_WHITE_SPACE,
self::ST_SYNT_LEXEME,
self::ST_LEXEME,
self::ST_QUOTED_LEXEME,
self::ST_ESCAPED_CHAR,
self::ST_ESCAPED_QCHAR,
self::ST_LEXEME_MODIFIER,
self::ST_NUMBER,
self::ST_MANTISSA,
self::ST_ERROR),
array(self::IN_WHITE_SPACE,
self::IN_SYNT_CHAR,
self::IN_MUTABLE_CHAR,
self::IN_LEXEME_MODIFIER,
self::IN_ESCAPE_CHAR,
self::IN_QUOTE,
self::IN_DECIMAL_POINT,
self::IN_ASCII_DIGIT,
self::IN_CHAR));
$lexemeModifierErrorAction = new Zend_Search_Lucene_FSMAction($this, 'lexModifierErrException');
$quoteWithinLexemeErrorAction = new Zend_Search_Lucene_FSMAction($this, 'quoteWithinLexemeErrException');
$wrongNumberErrorAction = new Zend_Search_Lucene_FSMAction($this, 'wrongNumberErrException');
$this->addRules(array( array(self::ST_WHITE_SPACE, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_WHITE_SPACE, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_WHITE_SPACE, self::IN_MUTABLE_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_WHITE_SPACE, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
array(self::ST_WHITE_SPACE, self::IN_ESCAPE_CHAR, self::ST_ESCAPED_CHAR),
array(self::ST_WHITE_SPACE, self::IN_QUOTE, self::ST_QUOTED_LEXEME),
array(self::ST_WHITE_SPACE, self::IN_DECIMAL_POINT, self::ST_LEXEME),
array(self::ST_WHITE_SPACE, self::IN_ASCII_DIGIT, self::ST_LEXEME),
array(self::ST_WHITE_SPACE, self::IN_CHAR, self::ST_LEXEME)
));
$this->addRules(array( array(self::ST_SYNT_LEXEME, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_SYNT_LEXEME, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_SYNT_LEXEME, self::IN_MUTABLE_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_SYNT_LEXEME, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
array(self::ST_SYNT_LEXEME, self::IN_ESCAPE_CHAR, self::ST_ESCAPED_CHAR),
array(self::ST_SYNT_LEXEME, self::IN_QUOTE, self::ST_QUOTED_LEXEME),
array(self::ST_SYNT_LEXEME, self::IN_DECIMAL_POINT, self::ST_LEXEME),
array(self::ST_SYNT_LEXEME, self::IN_ASCII_DIGIT, self::ST_LEXEME),
array(self::ST_SYNT_LEXEME, self::IN_CHAR, self::ST_LEXEME)
));
$this->addRules(array( array(self::ST_LEXEME, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_LEXEME, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_LEXEME, self::IN_MUTABLE_CHAR, self::ST_LEXEME),
array(self::ST_LEXEME, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
array(self::ST_LEXEME, self::IN_ESCAPE_CHAR, self::ST_ESCAPED_CHAR),
// IN_QUOTE not allowed
array(self::ST_LEXEME, self::IN_QUOTE, self::ST_ERROR, $quoteWithinLexemeErrorAction),
array(self::ST_LEXEME, self::IN_DECIMAL_POINT, self::ST_LEXEME),
array(self::ST_LEXEME, self::IN_ASCII_DIGIT, self::ST_LEXEME),
array(self::ST_LEXEME, self::IN_CHAR, self::ST_LEXEME)
));
$this->addRules(array( array(self::ST_QUOTED_LEXEME, self::IN_WHITE_SPACE, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_SYNT_CHAR, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_MUTABLE_CHAR, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_LEXEME_MODIFIER, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_ESCAPE_CHAR, self::ST_ESCAPED_QCHAR),
array(self::ST_QUOTED_LEXEME, self::IN_QUOTE, self::ST_WHITE_SPACE),
array(self::ST_QUOTED_LEXEME, self::IN_DECIMAL_POINT, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_ASCII_DIGIT, self::ST_QUOTED_LEXEME),
array(self::ST_QUOTED_LEXEME, self::IN_CHAR, self::ST_QUOTED_LEXEME)
));
$this->addRules(array( array(self::ST_ESCAPED_CHAR, self::IN_WHITE_SPACE, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_SYNT_CHAR, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_MUTABLE_CHAR, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_LEXEME_MODIFIER, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_ESCAPE_CHAR, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_QUOTE, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_DECIMAL_POINT, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_ASCII_DIGIT, self::ST_LEXEME),
array(self::ST_ESCAPED_CHAR, self::IN_CHAR, self::ST_LEXEME)
));
$this->addRules(array( array(self::ST_ESCAPED_QCHAR, self::IN_WHITE_SPACE, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_SYNT_CHAR, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_MUTABLE_CHAR, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_LEXEME_MODIFIER, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_ESCAPE_CHAR, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_QUOTE, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_DECIMAL_POINT, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_ASCII_DIGIT, self::ST_QUOTED_LEXEME),
array(self::ST_ESCAPED_QCHAR, self::IN_CHAR, self::ST_QUOTED_LEXEME)
));
$this->addRules(array( array(self::ST_LEXEME_MODIFIER, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_LEXEME_MODIFIER, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_LEXEME_MODIFIER, self::IN_MUTABLE_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_LEXEME_MODIFIER, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
// IN_ESCAPE_CHAR not allowed
array(self::ST_LEXEME_MODIFIER, self::IN_ESCAPE_CHAR, self::ST_ERROR, $lexemeModifierErrorAction),
// IN_QUOTE not allowed
array(self::ST_LEXEME_MODIFIER, self::IN_QUOTE, self::ST_ERROR, $lexemeModifierErrorAction),
array(self::ST_LEXEME_MODIFIER, self::IN_DECIMAL_POINT, self::ST_MANTISSA),
array(self::ST_LEXEME_MODIFIER, self::IN_ASCII_DIGIT, self::ST_NUMBER),
// IN_CHAR not allowed
array(self::ST_LEXEME_MODIFIER, self::IN_CHAR, self::ST_ERROR, $lexemeModifierErrorAction),
));
$this->addRules(array( array(self::ST_NUMBER, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_NUMBER, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_NUMBER, self::IN_MUTABLE_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_NUMBER, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
// IN_ESCAPE_CHAR not allowed
array(self::ST_NUMBER, self::IN_ESCAPE_CHAR, self::ST_ERROR, $wrongNumberErrorAction),
// IN_QUOTE not allowed
array(self::ST_NUMBER, self::IN_QUOTE, self::ST_ERROR, $wrongNumberErrorAction),
array(self::ST_NUMBER, self::IN_DECIMAL_POINT, self::ST_MANTISSA),
array(self::ST_NUMBER, self::IN_ASCII_DIGIT, self::ST_NUMBER),
// IN_CHAR not allowed
array(self::ST_NUMBER, self::IN_CHAR, self::ST_ERROR, $wrongNumberErrorAction),
));
$this->addRules(array( array(self::ST_MANTISSA, self::IN_WHITE_SPACE, self::ST_WHITE_SPACE),
array(self::ST_MANTISSA, self::IN_SYNT_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_MANTISSA, self::IN_MUTABLE_CHAR, self::ST_SYNT_LEXEME),
array(self::ST_MANTISSA, self::IN_LEXEME_MODIFIER, self::ST_LEXEME_MODIFIER),
// IN_ESCAPE_CHAR not allowed
array(self::ST_MANTISSA, self::IN_ESCAPE_CHAR, self::ST_ERROR, $wrongNumberErrorAction),
// IN_QUOTE not allowed
array(self::ST_MANTISSA, self::IN_QUOTE, self::ST_ERROR, $wrongNumberErrorAction),
// IN_DECIMAL_POINT not allowed
array(self::ST_MANTISSA, self::IN_DECIMAL_POINT, self::ST_ERROR, $wrongNumberErrorAction),
array(self::ST_MANTISSA, self::IN_ASCII_DIGIT, self::ST_MANTISSA),
// IN_CHAR not allowed
array(self::ST_MANTISSA, self::IN_CHAR, self::ST_ERROR, $wrongNumberErrorAction),
));
/** Actions */
$syntaxLexemeAction = new Zend_Search_Lucene_FSMAction($this, 'addQuerySyntaxLexeme');
$lexemeModifierAction = new Zend_Search_Lucene_FSMAction($this, 'addLexemeModifier');
$addLexemeAction = new Zend_Search_Lucene_FSMAction($this, 'addLexeme');
$addQuotedLexemeAction = new Zend_Search_Lucene_FSMAction($this, 'addQuotedLexeme');
$addNumberLexemeAction = new Zend_Search_Lucene_FSMAction($this, 'addNumberLexeme');
$addLexemeCharAction = new Zend_Search_Lucene_FSMAction($this, 'addLexemeChar');
/** Syntax lexeme */
$this->addEntryAction(self::ST_SYNT_LEXEME, $syntaxLexemeAction);
// Two lexemes in succession
$this->addTransitionAction(self::ST_SYNT_LEXEME, self::ST_SYNT_LEXEME, $syntaxLexemeAction);
/** Lexeme */
$this->addEntryAction(self::ST_LEXEME, $addLexemeCharAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_LEXEME, $addLexemeCharAction);
// ST_ESCAPED_CHAR => ST_LEXEME transition is covered by ST_LEXEME entry action
$this->addTransitionAction(self::ST_LEXEME, self::ST_WHITE_SPACE, $addLexemeAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_SYNT_LEXEME, $addLexemeAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_QUOTED_LEXEME, $addLexemeAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_LEXEME_MODIFIER, $addLexemeAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_NUMBER, $addLexemeAction);
$this->addTransitionAction(self::ST_LEXEME, self::ST_MANTISSA, $addLexemeAction);
/** Quoted lexeme */
// We don't need entry action (skeep quote)
$this->addTransitionAction(self::ST_QUOTED_LEXEME, self::ST_QUOTED_LEXEME, $addLexemeCharAction);
$this->addTransitionAction(self::ST_ESCAPED_QCHAR, self::ST_QUOTED_LEXEME, $addLexemeCharAction);
// Closing quote changes state to the ST_WHITE_SPACE other states are not used
$this->addTransitionAction(self::ST_QUOTED_LEXEME, self::ST_WHITE_SPACE, $addQuotedLexemeAction);
/** Lexeme modifier */
$this->addEntryAction(self::ST_LEXEME_MODIFIER, $lexemeModifierAction);
/** Number */
$this->addEntryAction(self::ST_NUMBER, $addLexemeCharAction);
$this->addEntryAction(self::ST_MANTISSA, $addLexemeCharAction);
$this->addTransitionAction(self::ST_NUMBER, self::ST_NUMBER, $addLexemeCharAction);
// ST_NUMBER => ST_MANTISSA transition is covered by ST_MANTISSA entry action
$this->addTransitionAction(self::ST_MANTISSA, self::ST_MANTISSA, $addLexemeCharAction);
$this->addTransitionAction(self::ST_NUMBER, self::ST_WHITE_SPACE, $addNumberLexemeAction);
$this->addTransitionAction(self::ST_NUMBER, self::ST_SYNT_LEXEME, $addNumberLexemeAction);
$this->addTransitionAction(self::ST_NUMBER, self::ST_LEXEME_MODIFIER, $addNumberLexemeAction);
$this->addTransitionAction(self::ST_MANTISSA, self::ST_WHITE_SPACE, $addNumberLexemeAction);
$this->addTransitionAction(self::ST_MANTISSA, self::ST_SYNT_LEXEME, $addNumberLexemeAction);
$this->addTransitionAction(self::ST_MANTISSA, self::ST_LEXEME_MODIFIER, $addNumberLexemeAction);
}
/**
* Translate input char to an input symbol of state machine
*
* @param string $char
* @return integer
*/
private function _translateInput($char)
{
if (strpos(self::QUERY_WHITE_SPACE_CHARS, $char) !== false) { return self::IN_WHITE_SPACE;
} else if (strpos(self::QUERY_SYNT_CHARS, $char) !== false) { return self::IN_SYNT_CHAR;
} else if (strpos(self::QUERY_MUTABLE_CHARS, $char) !== false) { return self::IN_MUTABLE_CHAR;
} else if (strpos(self::QUERY_LEXEMEMODIFIER_CHARS, $char) !== false) { return self::IN_LEXEME_MODIFIER;
} else if (strpos(self::QUERY_ASCIIDIGITS_CHARS, $char) !== false) { return self::IN_ASCII_DIGIT;
} else if ($char === '"' ) { return self::IN_QUOTE;
} else if ($char === '.' ) { return self::IN_DECIMAL_POINT;
} else if ($char === '\\') { return self::IN_ESCAPE_CHAR;
} else { return self::IN_CHAR;
}
}
/**
* This method is used to tokenize query string into lexemes
*
* @param string $inputString
* @param string $encoding
* @return array
* @throws Zend_Search_Lucene_Search_QueryParserException
*/
public function tokenize($inputString, $encoding)
{
$this->reset();
$this->_lexemes = array();
$this->_queryString = array();
if (PHP_OS == 'AIX' && $encoding == '') {
$encoding = 'ISO8859-1';
}
$strLength = iconv_strlen($inputString, $encoding);
// Workaround for iconv_substr bug
$inputString .= ' ';
for ($count = 0; $count < $strLength; $count++) {
$this->_queryString[$count] = iconv_substr($inputString, $count, 1, $encoding);
}
for ($this->_queryStringPosition = 0;
$this->_queryStringPosition < count($this->_queryString);
$this->_queryStringPosition++) {
$this->process($this->_translateInput($this->_queryString[$this->_queryStringPosition]));
}
$this->process(self::IN_WHITE_SPACE);
if ($this->getState() != self::ST_WHITE_SPACE) {
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Unexpected end of query');
}
$this->_queryString = null;
return $this->_lexemes;
}
/*********************************************************************
* Actions implementation
*
* Actions affect on recognized lexemes list
*********************************************************************/
/**
* Add query syntax lexeme
*
* @throws Zend_Search_Lucene_Search_QueryParserException
*/
public function addQuerySyntaxLexeme()
{
$lexeme = $this->_queryString[$this->_queryStringPosition];
// Process two char lexemes
if (strpos(self::QUERY_DOUBLECHARLEXEME_CHARS, $lexeme) !== false) {
// increase current position in a query string
$this->_queryStringPosition++;
// check,
if ($this->_queryStringPosition == count($this->_queryString) ||
$this->_queryString[$this->_queryStringPosition] != $lexeme) {
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Two chars lexeme expected. ' . $this->_positionMsg());
}
// duplicate character
$lexeme .= $lexeme;
}
$token = new Zend_Search_Lucene_Search_QueryToken(
Zend_Search_Lucene_Search_QueryToken::TC_SYNTAX_ELEMENT,
$lexeme,
$this->_queryStringPosition);
// Skip this lexeme if it's a field indicator ':' and treat previous as 'field' instead of 'word'
if ($token->type == Zend_Search_Lucene_Search_QueryToken::TT_FIELD_INDICATOR) {
$token = array_pop($this->_lexemes);
if ($token === null || $token->type != Zend_Search_Lucene_Search_QueryToken::TT_WORD) {
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Field mark \':\' must follow field name. ' . $this->_positionMsg());
}
$token->type = Zend_Search_Lucene_Search_QueryToken::TT_FIELD;
}
$this->_lexemes[] = $token;
}
/**
* Add lexeme modifier
*/
public function addLexemeModifier()
{
$this->_lexemes[] = new Zend_Search_Lucene_Search_QueryToken(
Zend_Search_Lucene_Search_QueryToken::TC_SYNTAX_ELEMENT,
$this->_queryString[$this->_queryStringPosition],
$this->_queryStringPosition);
}
/**
* Add lexeme
*/
public function addLexeme()
{
$this->_lexemes[] = new Zend_Search_Lucene_Search_QueryToken(
Zend_Search_Lucene_Search_QueryToken::TC_WORD,
$this->_currentLexeme,
$this->_queryStringPosition - 1);
$this->_currentLexeme = '';
}
/**
* Add quoted lexeme
*/
public function addQuotedLexeme()
{
$this->_lexemes[] = new Zend_Search_Lucene_Search_QueryToken(
Zend_Search_Lucene_Search_QueryToken::TC_PHRASE,
$this->_currentLexeme,
$this->_queryStringPosition);
$this->_currentLexeme = '';
}
/**
* Add number lexeme
*/
public function addNumberLexeme()
{
$this->_lexemes[] = new Zend_Search_Lucene_Search_QueryToken(
Zend_Search_Lucene_Search_QueryToken::TC_NUMBER,
$this->_currentLexeme,
$this->_queryStringPosition - 1);
$this->_currentLexeme = '';
}
/**
* Extend lexeme by one char
*/
public function addLexemeChar()
{
$this->_currentLexeme .= $this->_queryString[$this->_queryStringPosition];
}
/**
* Position message
*
* @return string
*/
private function _positionMsg()
{
return 'Position is ' . $this->_queryStringPosition . '.';
}
/*********************************************************************
* Syntax errors actions
*********************************************************************/
public function lexModifierErrException()
{
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Lexeme modifier character can be followed only by number, white space or query syntax element. ' . $this->_positionMsg());
}
public function quoteWithinLexemeErrException()
{
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Quote within lexeme must be escaped by \'\\\' char. ' . $this->_positionMsg());
}
public function wrongNumberErrException()
{
require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
throw new Zend_Search_Lucene_Search_QueryParserException('Wrong number syntax.' . $this->_positionMsg());
}
}
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