Lucene query parser. More...

Inheritance diagram for ilLuceneQueryParser:

Collaboration diagram for ilLuceneQueryParser:

Public Member Functions
	__construct ($a_query_string)
	Constructor.
	parse ()
	parse query string
	getQuery ()
	get query

Static Public Member Functions
static	validateQuery ($a_query)

Protected Member Functions
	replaceOwnerCallback ($matches)
	Replace owner callback (preg_replace_callback)

Static Protected Member Functions
static	checkAllowedCharacters ($query)
	Check allowed characters.
static	checkAsterisk ($query)
	Check asterisk.
static	checkAmpersands ($query)
	Check ampersands.
static	checkCaret ($query)
	Check carets.
static	checkSquiggle ($query)
	Check squiggles.
static	checkExclamationMark ($query)
	Check exclamation marks (replacement for NOT)
static	checkQuestionMark ($query)
	Check question mark (wild card single character)
static	checkParenthesis ($a_query)
	Check parenthesis.
static	checkPlusMinus ($a_query)
	Check plus minus.
static	checkANDORNOT ($a_query)
	Check AND OR NOT.
static	checkQuotes ($a_query)
	Check quotes.
static	checkColon ($a_query)
	Check colon.

Protected Attributes
	$parsed_query

Private Attributes
	$query_string

Detailed Description

Lucene query parser.

Author: Stefan Meyer meyer.nosp@m.@lei.nosp@m.fos.c.nosp@m.om

Version: $Id$

Definition at line 35 of file class.ilLuceneQueryParser.php.

Constructor & Destructor Documentation

ilLuceneQueryParser::__construct ( $a_query_string )

Constructor.

Parameters

string query string

Returns

Reimplemented in ilLuceneAdvancedQueryParser.

Definition at line 46 of file class.ilLuceneQueryParser.php.

        {
                $this->query_string = $a_query_string;
        }

Member Function Documentation

static ilLuceneQueryParser::checkAllowedCharacters ( $query )

staticprotected

Check allowed characters.

Exceptions

LuceneQueryParserException

Definition at line 113 of file class.ilLuceneQueryParser.php.

References $query.

        {
                if(preg_match('/[^\pL0-9_+\-:.()\"*?&§€|!{}\[\]\^~\\@#\/$%\'= ]/u',$query) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_allowed_characters');
                }
                return true;
        }

static ilLuceneQueryParser::checkAmpersands ( $query )

staticprotected

Check ampersands.

Exceptions

LuceneQueryParserException

Definition at line 139 of file class.ilLuceneQueryParser.php.

References $query.

        {
                if(preg_match('/[&]{2}/',$query) > 0)
                {
                        if(preg_match('/^([\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@#\/$%\'=]+( && )?[\pL0-9_+\-:.()\"*?|!{}\[\]\^~\\@#\/$%\'=]+[ ]*)+$/u',$query) == 0)
                        {
                                throw new ilLuceneQueryParserException('lucene_err_ampersand');
                        }
                }
                return true;
        } 

static ilLuceneQueryParser::checkANDORNOT ( $a_query )

staticprotected

Check AND OR NOT.

Exceptions

LuceneQueryParserException

Definition at line 268 of file class.ilLuceneQueryParser.php.

        {
                return true;
                
                if(preg_match('/^([\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@\/#$%\'=]+\s*((AND )|(OR )|(AND NOT )|(NOT ))?[\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@\/#$%\'=]+[ ]*)+$/u',$a_query) == 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_and_or_not');
                }
                return true;
        }

static ilLuceneQueryParser::checkAsterisk ( $query )

staticprotected

Check asterisk.

Exceptions

LuceneQueryParserException

Definition at line 126 of file class.ilLuceneQueryParser.php.

References $query.

        {
                if(preg_match('/^[\*]*$|[\s]\*|^\*[^\s]/',$query) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_asterisk');
                }
                return true;
        } 

static ilLuceneQueryParser::checkCaret ( $query )

staticprotected

Check carets.

Exceptions

LuceneQueryParserException

Definition at line 155 of file class.ilLuceneQueryParser.php.

References $query.

Referenced by validateQuery().

        {
                if(preg_match('/[^\\\]\^([^\s]*[^0-9.]+)|[^\\\]\^$/',$query) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_caret');
                }
                return true;
        } 

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static ilLuceneQueryParser::checkColon ( $a_query )

staticprotected

Check colon.

Exceptions

LuceneQueryParserException

Definition at line 311 of file class.ilLuceneQueryParser.php.

        {
                if(preg_match('/[^\\\\s]:[\s]|[^\\\\s]:$|[\s][^\\]?:|^[^\\\\s]?:/',$a_query) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_colon');
                }
                return true;
        }

static ilLuceneQueryParser::checkExclamationMark ( $query )

staticprotected

Check exclamation marks (replacement for NOT)

Exceptions

LuceneQueryParserException

Definition at line 181 of file class.ilLuceneQueryParser.php.

References $query.

        {
                if(preg_match('/^[^!]*$|^([\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@#\/$%\'=]+( ! )?[\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@#\/$%\'=]+[ ]*)+$/u',$query,$matches) == 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_exclamation_mark');
                }
                return true;
        } 

static ilLuceneQueryParser::checkParenthesis ( $a_query )

staticprotected

Check parenthesis.

Exceptions

LuceneQueryParserException

Definition at line 207 of file class.ilLuceneQueryParser.php.

Referenced by validateQuery().

        {
                $hasLft = false;
                $hasRgt = false;
                
                $matchLft = 0;
                $matchRgt = 0;
                
                $tmp = array();
                
                if(($matchLft = preg_match_all('/[(]/',$a_query,$tmp)) > 0)
                {
                        $hasLft = true;
                }
                if(($matchRgt = preg_match_all('/[)]/',$a_query,$tmp)) > 0)
                {
                        $hasRgt = true;
                }
                
                if(!$hasLft || !$hasRgt)
                {
                        return true;
                }
                
                
                if(($hasLft && !$hasRgt) || ($hasRgt && !$hasLft))
                {
                        throw new ilLuceneQueryParserException('lucene_err_parenthesis_not_closed');
                }
                
                if($matchLft !== $matchRgt)
                {
                        throw new ilLuceneQueryParserException('lucene_err_parenthesis_not_closed');
                }
                
                if(preg_match('/\(\s*\)/',$a_query) > 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_parenthesis_empty');
                }
                return true;            
        }  

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static ilLuceneQueryParser::checkPlusMinus ( $a_query )

staticprotected

Check plus minus.

Exceptions

LuceneQueryParserException

Definition at line 254 of file class.ilLuceneQueryParser.php.

        {
                if(preg_match('/^[^\n+\-]*$|^([+-]?\s*[\pL0-9_:.()\"*?&|!{}\[\]\^~\\@#\/$%\'=]+[ ]?)+$/u',$a_query) == 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_plus_minus');
                }
                return true;
        }

static ilLuceneQueryParser::checkQuestionMark ( $query )

staticprotected

Check question mark (wild card single character)

Exceptions

LuceneQueryParserException

Definition at line 194 of file class.ilLuceneQueryParser.php.

References $query.

        {
                if(preg_match('/^(\?)|([^\pL0-9_+\-:.()\"*?&|!{}\[\]\^~\\@#\/$%\'=]\?+)/u',$query,$matches) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_question_mark');
                }
                return true;
        }

static ilLuceneQueryParser::checkQuotes ( $a_query )

staticprotected

Check quotes.

Exceptions

LuceneQueryParserException

Definition at line 284 of file class.ilLuceneQueryParser.php.

Referenced by validateQuery().

        {
                $matches = preg_match_all('/"/',$a_query,$tmp);
                
                if($matches == 0)
                {
                        return true;
                }
                
                if(($matches % 2) > 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_quotes');
                }
                if(preg_match('/"\s*"/',$a_query) > 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_quotes_not_empty');
                }
                return true;
        }

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static ilLuceneQueryParser::checkSquiggle ( $query )

staticprotected

Check squiggles.

Exceptions

LuceneQueryParserException

Definition at line 168 of file class.ilLuceneQueryParser.php.

References $query.

Referenced by validateQuery().

        {
                if(preg_match('/[^\\\]*~[^\s]*[^0-9\s]+/',$query,$matches) != 0)
                {
                        throw new ilLuceneQueryParserException('lucene_err_squiggle');
                }
                return true;
        } 

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ilLuceneQueryParser::getQuery ( )

get query

Returns

Definition at line 64 of file class.ilLuceneQueryParser.php.

References $parsed_query.

        {
                return $this->parsed_query;      
        }

ilLuceneQueryParser::parse ( )

parse query string

Returns

Reimplemented in ilLuceneAdvancedQueryParser.

Definition at line 55 of file class.ilLuceneQueryParser.php.

Referenced by ilLuceneSearchGUI\performSearch(), and ilLuceneSearchGUI\showSavedResults().

        {
                $this->parsed_query = preg_replace_callback('/(owner:)\s?([A-Za-z0-9_\.\+\*\@!\$\%\~\-]+)/',array($this,'replaceOwnerCallback'),$this->query_string);
        }

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ilLuceneQueryParser::replaceOwnerCallback ( $matches )

protected

Replace owner callback (preg_replace_callback)

Definition at line 72 of file class.ilLuceneQueryParser.php.

References $usr_id, and ilObjUser\_loginExists().

        {
                if(isset($matches[2]))
                {
                        if($usr_id = ilObjUser::_loginExists($matches[2]))
                        {
                                return $matches[1].$usr_id;
                        }       
                }
                return $matches[0];
        }

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static ilLuceneQueryParser::validateQuery ( $a_query )

static

Exceptions

LuceneQueryParserException

Definition at line 88 of file class.ilLuceneQueryParser.php.

References checkCaret(), checkParenthesis(), checkQuotes(), and checkSquiggle().

Referenced by ilLuceneQueryInputGUI\checkInput().

        {
                // TODO
                // First replace all quote characters
                
                #ilLuceneQueryParser::checkAllowedCharacters($a_query);
                #ilLuceneQueryParser::checkAsterisk($a_query);
                #ilLuceneQueryParser::checkAmpersands($a_query);
                ilLuceneQueryParser::checkCaret($a_query);
                ilLuceneQueryParser::checkSquiggle($a_query);
                #ilLuceneQueryParser::checkExclamationMark($a_query);
                #ilLuceneQueryParser::checkQuestionMark($a_query);
                ilLuceneQueryParser::checkParenthesis($a_query);
                #ilLuceneQueryParser::checkPlusMinus($a_query);
                #ilLuceneQueryParser::checkANDORNOT($a_query);
                ilLuceneQueryParser::checkQuotes($a_query);
                #ilLuceneQueryParser::checkColon($a_query);
                return true;
        }