ilLuceneSearchResultFilter Class Reference

Validate Lucene search results Do access checks, create ref_ids from obj_ids... More...

Collaboration diagram for ilLuceneSearchResultFilter:

Public Member Functions
	addFilter (ilLuceneResultFilter $filter)
	add filter
	setCandidates ($a_ids)
	Set result ids.
	getCandidates ()
	get result ids
	getUserId ()
	Get user id.
	getRequiredPermission ()
	Get required permission.
	isLimitReached ()
	Check if search max hits is reached.
	getResultIds ()
	get filtered ids
	getResultObjIds ()
	get filtered ids
	getResults ()
	get results
	getMaxHits ()
	get max hits
	loadFromDb ()
	Load results from db.
	filter ()
	Filter search results.

Static Public Member Functions
static	getInstance ($a_user_id)

Protected Member Functions
	__construct ($a_user_id)
	Singleton constructor.
	checkFilter ($a_ref_id)
	check appended filter
	append ($a_ref_id, $a_obj_id)
	Append to filtered results.
	isOffsetReached ($a_current_nr)
	Check if offset is reached.

Protected Attributes
	$user_id = null
	$result = array()
	$checked = array()
	$settings
	$cache
	$required_permission = 'visible'
	$limit_reached = false
	$offset = 0
	$filters = array()

Static Protected Attributes
static	$instance = null

Detailed Description

Validate Lucene search results Do access checks, create ref_ids from obj_ids...

Author

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

Version

$Id$

Definition at line 34 of file class.ilLuceneSearchResultFilter.php.

Constructor & Destructor Documentation

ilLuceneSearchResultFilter::__construct (   $a_user_id )

protected

Singleton constructor.

Parameters

int

$a_usr_id

user id

Returns

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

References ilUserSearchCache\_getInstance(), getInstance(), and getUserId().

        {
                $this->user_id = $a_user_id;
                $this->settings = ilSearchSettings::getInstance();

                include_once('Services/Search/classes/class.ilUserSearchCache.php');
                $this->cache = ilUserSearchCache::_getInstance($this->getUserId());
                
                $this->offset = $this->settings->getMaxHits() * ($this->cache->getResultPageNumber() - 1);
        }

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Member Function Documentation

ilLuceneSearchResultFilter::addFilter

(

ilLuceneResultFilter

$filter

)

add filter

Parameters

@return

Definition at line 86 of file class.ilLuceneSearchResultFilter.php.

        {
                $this->filters[] = $filter;
        }

ilLuceneSearchResultFilter::append (   $a_ref_id,   $a_obj_id  )

protected

Append to filtered results.

Parameters

int	ref_id
int	obj_id

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

Referenced by filter().

        {
                $this->checked[$a_ref_id] = $a_obj_id;
        }

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ilLuceneSearchResultFilter::checkFilter (   $a_ref_id )

protected

check appended filter

Parameters

int

$a_ref_id

reference id

Returns

bool

Definition at line 267 of file class.ilLuceneSearchResultFilter.php.

Referenced by filter().

        {
                foreach($this->filters as $filter)
                {
                        if(!$filter->filter($a_ref_id))
                        {
                                return false;
                        }
                }
                return true;
        }

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ilLuceneSearchResultFilter::filter

(

)

Filter search results.

Do RBAC checks.

public

Parameters

int	root node id
bool	check and boolean search

Returns

bool success status

Definition at line 197 of file class.ilLuceneSearchResultFilter.php.

References $ilLog, $ref_id, ilObject\_getAllReferences(), append(), checkFilter(), getCandidates(), getRequiredPermission(), getResultIds(), and isOffsetReached().

        {
                global $ilAccess,$ilLog,$tree;

                // get ref_ids and check access
                $counter = 0;
                $offset_counter = 0;
                
                foreach($this->getCandidates() as $obj_id)
                {
                        // Check referenced objects
                        foreach(ilObject::_getAllReferences($obj_id) as $ref_id)
                        {
                                // Check filter
                                if(!$this->checkFilter($ref_id))
                                {
                                        $this->cache->appendToFailed($ref_id);
                                        continue;
                                }

                                // Access failed by prior check
                                if($this->cache->isFailed($ref_id))
                                {
                                        continue;
                                }
                                // Offset check
                                if($this->cache->isChecked($ref_id) and !$this->isOffsetReached($offset_counter))
                                {
                                        $ilLog->write(__METHOD__.': Result was checked.');
                                        $offset_counter++;
                                        break;
                                }
                                
                                // RBAC check
                                if($ilAccess->checkAccessOfUser($this->getUserId(),
                                                                                                          $this->getRequiredPermission(),
                                                                                                          '',
                                                                                                          $ref_id,
                                                                                                          '',
                                                                                                          $obj_id))
                                {
                                        ++$counter;
                                        $offset_counter++;
                                        $this->append($ref_id,$obj_id);
                                        $this->cache->appendToChecked($ref_id,$obj_id);
                                        break;
                                }
                                else
                                {
                                        $this->cache->appendToFailed($ref_id);
                                }
                        }
                        if($counter >= $this->settings->getMaxHits())
                        {
                                $this->limit_reached = true;
                                $this->cache->setResults($this->getResultIds());
                                $this->cache->save();
                                return false;
                        }
                }
                $this->cache->setResults($this->getResultIds());
                $this->cache->save();
                return true;
        }

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ilLuceneSearchResultFilter::getCandidates

(

)

get result ids

Returns

array result ids

Definition at line 105 of file class.ilLuceneSearchResultFilter.php.

Referenced by filter().

        {
                return $this->result ? $this->result : array();
        }

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static ilLuceneSearchResultFilter::getInstance (   $a_user_id )

static

Parameters

int

$a_user_id

user_id

Returns

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

References $instance.

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

        {
                if(self::$instance == null)
                {
                        return self::$instance = new ilLuceneSearchResultFilter($a_user_id);
                }
                return self::$instance;
        }

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ilLuceneSearchResultFilter::getMaxHits

(

)

get max hits

Returns

int max hits per page

Definition at line 172 of file class.ilLuceneSearchResultFilter.php.

        {
                return $this->settings->getMaxHits();            
        }

ilLuceneSearchResultFilter::getRequiredPermission

(

)

Get required permission.

Returns

string required rbac permission

Definition at line 123 of file class.ilLuceneSearchResultFilter.php.

References $required_permission.

Referenced by filter().

        {
                return $this->required_permission;
        }

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ilLuceneSearchResultFilter::getResultIds

(

)

get filtered ids

Returns

array array of filtered ref_ids

Definition at line 141 of file class.ilLuceneSearchResultFilter.php.

Referenced by filter().

        {
                return $this->checked ? $this->checked : array();
        }

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ilLuceneSearchResultFilter::getResultObjIds

(

)

get filtered ids

Returns

array array of filtered ref_ids

Definition at line 150 of file class.ilLuceneSearchResultFilter.php.

        {
                foreach($this->checked as $obj_id)
                {
                        $obj_ids[] = $obj_id;
                }
                return $obj_ids ? $obj_ids : array();
        }

ilLuceneSearchResultFilter::getResults

(

)

get results

Returns

array array of ref_ids

Definition at line 163 of file class.ilLuceneSearchResultFilter.php.

        {
                return $this->checked ? $this->checked : array();
        }

ilLuceneSearchResultFilter::getUserId

(

)

Get user id.

Returns

int user_id

Definition at line 114 of file class.ilLuceneSearchResultFilter.php.

References $user_id.

Referenced by __construct().

        {
                return $this->user_id;
        }

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ilLuceneSearchResultFilter::isLimitReached

(

)

Check if search max hits is reached.

Returns

bool max hits reached

Definition at line 132 of file class.ilLuceneSearchResultFilter.php.

References $limit_reached.

        {
                return (bool) $this->limit_reached;
        }

ilLuceneSearchResultFilter::isOffsetReached (   $a_current_nr )

protected

Check if offset is reached.

Parameters

int

$a_current_nr

Current result number

Returns

bool

Definition at line 294 of file class.ilLuceneSearchResultFilter.php.

Referenced by filter().

        {
                return $a_current_nr < $this->offset ? false : true;
        }

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ilLuceneSearchResultFilter::loadFromDb

(

)

Load results from db.

Returns

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

        {
                $this->checked = $this->cache->getResults();
        }

ilLuceneSearchResultFilter::setCandidates

(

$a_ids

)

Set result ids.

Parameters

mixed

$a_ids

Lucene result ids or instance of Iterator

Returns

void

Definition at line 96 of file class.ilLuceneSearchResultFilter.php.

        {
                $this->result = $a_ids;
        }

Field Documentation

ilLuceneSearchResultFilter::$cache

protected

Definition at line 42 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$checked = array()

protected

Definition at line 40 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$filters = array()

protected

Definition at line 47 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$instance = null

staticprotected

Definition at line 36 of file class.ilLuceneSearchResultFilter.php.

Referenced by getInstance().

ilLuceneSearchResultFilter::$limit_reached = false

protected

Definition at line 44 of file class.ilLuceneSearchResultFilter.php.

Referenced by isLimitReached().

ilLuceneSearchResultFilter::$offset = 0

protected

Definition at line 45 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$required_permission = 'visible'

protected

Definition at line 43 of file class.ilLuceneSearchResultFilter.php.

Referenced by getRequiredPermission().

ilLuceneSearchResultFilter::$result = array()

protected

Definition at line 39 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$settings

protected

Definition at line 41 of file class.ilLuceneSearchResultFilter.php.

ilLuceneSearchResultFilter::$user_id = null

protected

Definition at line 38 of file class.ilLuceneSearchResultFilter.php.

Referenced by getUserId().

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The documentation for this class was generated from the following file:

• Services/Search/classes/Lucene/class.ilLuceneSearchResultFilter.php