Search/Lucene/Search/Query/Fuzzy.php

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Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License
Package: Zend_Search_Lucene
Subpackage: Search
Version: $Id$

\Zend_Search_Lucene_Search_Query_Fuzzy
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Package: Zend_Search_Lucene\Search

Parent(s): \Zend_Search_Lucene_Search_Query
Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Constants

 
                DEFAULT_MIN_SIMILARITY
                = 0.5

Default minimum similarity

 
                MAX_CLAUSE_COUNT
                = 1024

Maximum number of matched terms.

Apache Lucene defines this limitation as boolean query maximum number of clauses: org.apache.lucene.search.BooleanQuery.getMaxClauseCount()

Properties

integer $_defaultPrefixLength = 3

static

Default non-fuzzy prefix length

Default value3Details

Type: integer

array $_matches = null

Matched terms.

Matched terms list. It's filled during the search (rewrite operation) and may be used for search result post-processing Array of Zend_Search_Lucene_Index_Term objects

Default valuenullDetails

Type: array

$_maxDistances = array()

Array of precalculated max distances

keys are integers representing a word size

Default valuearray()Details

Type: n/a

float $_minimumSimilarity

A value between 0 and 1 to set the required similarity between the query term and the matching terms. For example, for a _minimumSimilarity of 0.5 a term of the same length as the query term is considered similar to the query term if the edit distance between both terms is less than length(term)*0.5

Details

Type: float

integer $_prefixLength

The length of common (non-fuzzy) prefix

Details

Type: integer

array $_scores = null

Matched terms scores

Default valuenullDetails

Type: array

\Zend_Search_Lucene_Index_Term $_term

Base searching term.

Details

Type: \Zend_Search_Lucene_Index_Term

array $_termKeys = null

Array of the term keys.

Used to sort terms in alphabetical order if terms have the same socres

Default valuenullDetails

Type: array

Methods

__construct(\Zend_Search_Lucene_Index_Term $term, float $minimumSimilarity = self::DEFAULT_MIN_SIMILARITY, integer $prefixLength = null) : void

Zend_Search_Lucene_Search_Query_Wildcard constructor.

Parameters

Name	Type	Description
$term	\Zend_Search_Lucene_Index_Term
$minimumSimilarity	float
$prefixLength	integer

Throws

Exception	Description
\Zend_Search_Lucene_Exception

__toString() : string

Print a query

Returns

Type	Description
string

_calculateMaxDistance(integer $prefixLength, integer $termLength, integer $length) : integer

Calculate maximum distance for specified word length

Parameters

Name	Type	Description
$prefixLength	integer
$termLength	integer
$length	integer

Returns

Type	Description
integer

_highlightMatches(\Zend_Search_Lucene_Search_Highlighter_Interface $highlighter) : void

Query specific matches highlighting

Parameters

Name	Type	Description
$highlighter	\Zend_Search_Lucene_Search_Highlighter_Interface	Highlighter object (also contains doc for highlighting)

createWeight(\Zend_Search_Lucene_Interface $reader) : \Zend_Search_Lucene_Search_Weight

Constructs an appropriate Weight implementation for this query.

Parameters

Name	Type	Description
$reader	\Zend_Search_Lucene_Interface

Returns

Type	Description
\Zend_Search_Lucene_Search_Weight

Throws

Exception	Description
\Zend_Search_Lucene_Exception

execute(\Zend_Search_Lucene_Interface $reader, \Zend_Search_Lucene_Index_DocsFilter | null $docsFilter = null) : void

Execute query in context of index reader It also initializes necessary internal structures

Parameters

Name	Type	Description
$reader	\Zend_Search_Lucene_Interface
$docsFilter	\Zend_Search_Lucene_Index_DocsFilter \| null

Throws

Exception	Description
\Zend_Search_Lucene_Exception

getDefaultPrefixLength() : integer

static

Get default non-fuzzy prefix length

Returns

Type	Description
integer

getQueryTerms() : array

Return query terms

Returns

Type	Description
array

Throws

Exception	Description
\Zend_Search_Lucene_Exception

matchedDocs() : array

Get document ids likely matching the query

It's an array with document ids as keys (performance considerations)

Returns

Type	Description
array

Throws

Exception	Description
\Zend_Search_Lucene_Exception

optimize(\Zend_Search_Lucene_Interface $index) : \Zend_Search_Lucene_Search_Query

Optimize query in the context of specified index

Parameters

Name	Type	Description
$index	\Zend_Search_Lucene_Interface

Returns

Type	Description
\Zend_Search_Lucene_Search_Query

rewrite(\Zend_Search_Lucene_Interface $index) : \Zend_Search_Lucene_Search_Query

Re-write query into primitive queries in the context of specified index

Parameters

Name	Type	Description
$index	\Zend_Search_Lucene_Interface

Returns

Type	Description
\Zend_Search_Lucene_Search_Query

Throws

Exception	Description
\Zend_Search_Lucene_Exception

score(integer $docId, \Zend_Search_Lucene_Interface $reader) : float

Score specified document

Parameters

Name	Type	Description
$docId	integer
$reader	\Zend_Search_Lucene_Interface

Returns

Type	Description
float

Throws

Exception	Description
\Zend_Search_Lucene_Exception

setDefaultPrefixLength(integer $defaultPrefixLength) : void

static

Set default non-fuzzy prefix length

Parameters

Name	Type	Description
$defaultPrefixLength	integer

Search/Lucene/Search/Query/Fuzzy.php

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Constants

Properties

Methods

\Zend_Search_Lucene_Search_Query_Fuzzy
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