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cvsjoko |
1.1 |
<? |
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// ------------------------------------------------ |
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// our DataStore |
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// instantiates a DataStore-Session |
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class DataStore { |
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// ------------------------------------------------ |
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var $session_current; |
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var $objectfactory; |
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// constructor |
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// create a new DataStore-Session |
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function DataStore($cfg) { |
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slog("DataStore: new DataStore()"); |
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$this->objectfactory =& new ObjectFactory(); |
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$this->session_current =& new DSSession($cfg); |
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$this->init(); |
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} |
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function init() { |
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$this->objectfactory->init(&$this); |
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$this->session_current->init(&$this); |
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} |
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function getDataObject($type) { |
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return $this->session_current->getDataObject($type); |
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} |
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function getDataCollection($type) { |
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return $this->session_current->getDataCollection($type); |
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} |
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function getDataOperation($name) { |
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return $this->session_current->getDataOperation($name); |
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} |
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// return a new DataStore-Session |
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function &getSession() { |
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slog("DataStore: &getSession()"); |
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global $database; |
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$database->ref_dssession =& $this->session_current; |
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return $this->session_current; |
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} |
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// return a new DataStore-ObjectFactory |
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function &getObjectFactory() { |
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slog("DataStore: &getObjectFactory()"); |
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return $this->objectfactory; |
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} |
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} |
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// ------------------------------------------------ |
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// our ObjectFactory |
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// normally instantiated inside a SessionManager-Session |
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class ObjectFactory { |
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// ------------------------------------------------ |
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// a hash for remembering which classes we already built |
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var $declaredClasses; |
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var $session; |
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// constructor |
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function &ObjectFactory() { |
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slog("ObjectFactory: new &ObjectFactory()"); |
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// clear declared-classes-hash |
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//global $glbl_declaredClasses; |
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//$glbl_declaredClasses = array(); |
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//$this->session =& $parentsession; |
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} |
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function init(&$datastore) { |
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slog("ObjectFactory: init(&$datastore)"); |
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$this->session =& $datastore->getSession(); |
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} |
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// ------ |
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// declares a new class "on the fly" which might extend another (existing) class |
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function declareClass($objecttype, $extends) { |
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// ------ |
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slog("ObjectFactory: declareClass($objecttype, $extends)"); |
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global $glbl_declaredClasses; |
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// perhaps everything has already been done? ... |
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if (!isset($glbl_declaredClasses[$objecttype])) { |
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// ... no, we do all the work now |
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// remember class |
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$glbl_declaredClasses[$objecttype] = 1; |
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// does the class extend from another existing one? |
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$extends_part = ''; |
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if ($extends) { $extends_part = "extends $extends"; } |
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// build evalstring |
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$evstring = "class $objecttype $extends_part {}"; |
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// evaluate evalstring |
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eval($evstring); |
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} |
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} |
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// ------ |
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// creates and returns a new DataObject |
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function &createEmptyDSDataObject($objecttype) { |
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// debugging |
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slog("ObjectFactory: &createEmptyDataObject($objecttype)"); |
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// declare a class which extends "DSDataObject" |
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$this->declareClass($objecttype, 'DSDataObject'); |
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// create and return new object instantiated from class declared above..... ( tricky, heh? :-) ) |
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return new $objecttype($objecttype, &$this->session); |
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} |
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// ------ |
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// creates and returns a new DataObject |
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function &createEmptyDSDataCollection($objecttype) { |
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// create and return new DataCollection |
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return new DSDataCollection($objecttype, &$this->session); |
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} |
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} |
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// ============================================================== |
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// the "DataStore"-"Session" |
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class DSSession { |
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// the session's "PDLEngine"-Object, with which we can retrieve all metadata |
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var $pdlengine; |
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// the session's ObjectFactory |
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var $objectfactory; |
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// -------------------------------------------------------------- |
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// constructor |
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function DSSession($cfg) { |
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// debugging |
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slog("DSSession: new &DSSession()"); |
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// create a new "PDLEngine"-object |
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$this->pdlengine =& new PDLEngine($cfg); |
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// create a new ObjectFactory |
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//$this->objectfactory =& $datastore->getObjectFactory(); |
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} |
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// -------------------------------------------------------------- |
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// initialize session |
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function init(&$datastore) { |
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// debugging |
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slog("DSSession: init(&$datastore)"); |
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// get reference to an "ObjectFactory" |
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$this->objectfactory =& $datastore->getObjectFactory(); |
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} |
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// -------------------------------------------------------------- |
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// returns a new "DSDataObject" of given ObjectType |
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function &getDataObject($objecttype) { |
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// debugging |
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slog("DSSession: &getDataObject($objecttype)"); |
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// if we can get metadata from pdl ... |
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if (($r_mo =& $this->pdlengine->getPDLObject($objecttype))) { |
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// ... create and return new "DSDataObject" |
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return $this->objectfactory->createEmptyDSDataObject($r_mo->type); |
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} else { |
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print("DSSession->getDataObject($objecttype) failed.<br>"); |
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} |
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} |
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// -------------------------------------------------------------- |
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// returns a new "DSDataCollectionObject" of given ObjectType |
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function &getDataCollection($objecttype) { |
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// debugging |
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slog("DSSession: &getDataCollection($objecttype)"); |
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// if we can get metadata from pdl ... |
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if (($r_mo =& $this->pdlengine->getPDLObject($objecttype))) { |
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// ... create and return new "DSDataCollection" |
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return $this->objectfactory->createEmptyDSDataCollection($r_mo->type); |
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} else { |
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print("<font color=\"red\">DSSession->getDataCollection() failed, could not retrieve meta-information (from pdl-file) about object \"$objecttype\"</font><br>"); |
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} |
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} |
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function &getDataOperation($name) { |
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// if we can get metadata from pdl ... |
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if (!($r_do =& $this->pdlengine->getPDLDataOperation($name))) { |
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trigger_error("DSSession->&getDataOperation(): Could not find PDLDataOperation \"$name\"", E_USER_ERROR); |
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} |
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$unreadySql = $r_do->get_unreadySql(); |
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// create new "DataQuery" we'll return later |
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$dq = new DataQuery(); |
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// initialize "DataQuery"s sql-part with the "unready" sql-statement |
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//$this->ref_dataquery->setQuery($unreadySql); |
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$dq->setQuery($unreadySql); |
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// initialize "DataQuery"s map-part with mapping-informations |
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// $this->ref_dataquery->setMap($this->ref_pdlModelObjectAttributes); |
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return $dq; |
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} |
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} |
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// ============================================================== |
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class DSFilter { |
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// here the parts of the filter-term are stored (hash) |
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var $store_input_term; |
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// a hash keeping the values got by "DSFilter->set($varname, $value)" |
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var $store_input_values; |
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// the output-information |
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var $store_output_terms; |
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//var $logicalOperator; |
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// have we been processed? |
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var $bool_processed; |
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// -------------------------------------------------------------- |
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function DSFilter($filterstring, $logicalOperator) { |
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// initialize class-variables |
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$this->store_input_term = ''; |
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$this->store_input_values = array(); |
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$this->store_output_terms = array(); |
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$this->logicalOperator = $logicalOperator; |
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$this->bool_processed = 0; |
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// debugging |
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slog("DSFilter: DSFilter($filterstring)"); |
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// TODO: |
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// do determination of *all* kinds of filter-formats here ... (or move this as a complete block to another proper/better location, |
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// or encapsulate it into a "FilterParserEngine" or "FilterFactory" or something like this!) |
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// e.g. these two kinds ("where ... like ...", "match ... against ...") and (new ones: "<column> IS NULL", "<column> IN (<list>)") |
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// ... and handle special reactions on these also here, so we can move on from below this block in a generic way :-) |
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 1. do we have a "WHERE ... LIKE ..." - kind of filter? |
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if ( preg_match('/(.+) (.+) (.+)/', $filterstring, $regs) ) { |
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$term = array( |
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'term' => $filterstring, |
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'attribute' => trim($regs[1]), // TODO: is really the left argument the attribute? we assume it for now ... |
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'lop' => trim($regs[2]), // TODO: lop-juggling (abstract the logical operator via meta-information!?) |
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'value' => trim($regs[3]), // TODO: is really the right argument the value? we assume it for now ... |
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); |
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// determine value-encapsulator |
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$bool_isNull = (($term['lop'] == 'IS') && ($term['value'] == '<Null>')); |
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$bool_isListComparison = ($term['lop'] == 'IN'); |
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if ($bool_isNull || $bool_isListComparison) { |
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$valueEncapsulator = ""; |
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} else { |
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$valueEncapsulator = "'"; |
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} |
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$term['valueEncapsulator'] = $valueEncapsulator; |
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$this->store_input_term = $term; |
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} |
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/* |
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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// 2. do we have a "MATCH ... AGAINST ..." - kind of filter? |
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if ( eregi('MATCH (.+) AGAINST (.+)', $filterstring, $regs) ) { |
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$term = array( |
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'term' => $filterstring, |
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'attribute' => trim($regs[1]), |
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'lop' => 'MATCH AGAINST', // TODO: lop-juggling (abstract the logical operator via meta-information!?) |
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'value' => trim($regs[2]), |
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); |
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$term['valueEncapsulator'] = "'"; |
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$this->store_input_term = $term; |
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} |
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*/ |
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} |
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// -------------------------------------------------------------- |
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function set($varname, $value) { |
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slog("DSFilter: set($varname, $value)"); |
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$this->store_input_values[$varname] = $value; |
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} |
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// -------------------------------------------------------------- |
| 326 |
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function getParsed() { |
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| 328 |
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if (!$this->bool_processed) { |
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$this->_process(); |
| 330 |
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} |
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| 332 |
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$retval = ''; |
| 333 |
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$bool_first = 1; |
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reset($this->store_output_terms); |
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while($term = current($this->store_output_terms)) { |
| 336 |
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if (!$bool_first) { |
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$retval .= ' ' . $this->logicalOperator . ' '; |
| 338 |
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} |
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$retval .= '(' . $term['attribute'] . ' ' . $term['lop'] . ' ' . $term['value'] . ')'; |
| 340 |
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$bool_first = 0; |
| 341 |
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next($this->store_output_terms); |
| 342 |
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} |
| 343 |
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| 344 |
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//print $retval . "<br>"; |
| 345 |
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return $retval; |
| 346 |
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| 347 |
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} |
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| 349 |
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| 350 |
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// -------------------------------------------------------------- |
| 351 |
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function _process() { |
| 352 |
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// debugging |
| 354 |
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slog("DSFilter: getParsed()"); |
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| 356 |
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$term = $this->store_input_term; |
| 357 |
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$terms_created = array(); |
| 358 |
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| 359 |
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reset($this->store_input_values); |
| 360 |
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while ( list($name, $value) = each($this->store_input_values) ) { |
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$termkey = $name; |
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| 364 |
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if (is_array($value)) { |
| 365 |
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$value_arr = $value; |
| 366 |
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for ($i = 0; $i < count($value_arr); $i++) { |
| 367 |
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$value = $value_arr[$i]; |
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$this->_process_term($term, $value, $terms_created[$termkey . '_' . $i]); |
| 369 |
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} |
| 370 |
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} else { |
| 371 |
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$this->_process_term($term, $value, $terms_created[$termkey]); |
| 372 |
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} |
| 373 |
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} |
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//dumpVar($terms_created); |
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| 378 |
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// store a processed term to the output-terms for usage in "->getParsed()"! |
| 379 |
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//array_push($this->store_output_terms, $term); |
| 380 |
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$this->store_output_terms = $terms_created; |
| 381 |
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| 382 |
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// declare us as processed |
| 383 |
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$this->bool_processed = 1; |
| 384 |
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| 385 |
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} |
| 386 |
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// -------------------------------------------------------------- |
| 389 |
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function _process_term($term, $value, &$term_output) { |
| 390 |
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| 391 |
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$bool_encapsulateValueInBrackets = 0; |
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// - - - - - - - - - - - - - - - |
| 394 |
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// 1. patches related to attributes |
| 395 |
|
|
// determine if the "attribute-string" is really a list |
| 396 |
|
|
// if (preg_match("/\((.+)\)/", $term['attribute'], $regs)) { |
| 397 |
|
|
//$list_attributes = $regs[1]; |
| 398 |
|
|
//$list_attributes = preg_replace("/(\w+)/", ":\\1", $list_attributes); |
| 399 |
|
|
//$term['attribute'] = "(" . $list_attributes . ")"; |
| 400 |
|
|
// $term['attribute'] = preg_replace("/(\w+)/", ":\\1", $regs[1]); |
| 401 |
|
|
if ($term['attribute'] = preg_replace("/(\w+)/", ":\\1", $term['attribute'])) { |
| 402 |
|
|
} else { |
| 403 |
|
|
// prefix single attributename with ':' |
| 404 |
|
|
$term['attribute'] = ":" . $term['attribute']; |
| 405 |
|
|
} |
| 406 |
|
|
|
| 407 |
|
|
// - - - - - - - - - - - - - - - |
| 408 |
|
|
// 2. patches related to logical operators |
| 409 |
|
|
if ($term['lop'] == 'MATCH_AGAINST') { |
| 410 |
|
|
$term['attribute'] = "MATCH " . $term['attribute']; |
| 411 |
|
|
$term['lop'] = "AGAINST"; |
| 412 |
|
|
$bool_encapsulateValueInBrackets = 1; |
| 413 |
|
|
} |
| 414 |
|
|
|
| 415 |
|
|
// - - - - - - - - - - - - - - - |
| 416 |
|
|
// 3. patches related to values |
| 417 |
|
|
|
| 418 |
|
|
if ($value == '<Null>') { |
| 419 |
|
|
$term['lop'] = 'IS'; |
| 420 |
|
|
$term['value'] = 'NULL'; |
| 421 |
|
|
} else { |
| 422 |
|
|
// set the "real" value |
| 423 |
|
|
$term['value'] = $term['valueEncapsulator'] . $value . $term['valueEncapsulator']; |
| 424 |
|
|
} |
| 425 |
|
|
|
| 426 |
|
|
if (preg_match('/IN \((.+)\)/', $value, $regs)) { |
| 427 |
|
|
$term['lop'] = 'IN'; |
| 428 |
|
|
$term['value'] = $regs[1]; |
| 429 |
|
|
$bool_encapsulateValueInBrackets = 1; |
| 430 |
|
|
} |
| 431 |
|
|
|
| 432 |
|
|
// 4. do some cleanup |
| 433 |
|
|
if ($bool_encapsulateValueInBrackets) { |
| 434 |
|
|
$term['value'] = '(' . $term['value'] . ')'; |
| 435 |
|
|
} |
| 436 |
|
|
|
| 437 |
|
|
$term_output = $term; |
| 438 |
|
|
|
| 439 |
|
|
} |
| 440 |
|
|
|
| 441 |
|
|
|
| 442 |
|
|
} |
| 443 |
|
|
|
| 444 |
|
|
|
| 445 |
|
|
|
| 446 |
|
|
// ============================================================== |
| 447 |
|
|
class DSSortOrder { |
| 448 |
|
|
|
| 449 |
|
|
var $attributename; |
| 450 |
|
|
var $order_ascdesc; |
| 451 |
|
|
|
| 452 |
|
|
function DSSortOrder($attributename, $order_ascdesc) { |
| 453 |
|
|
|
| 454 |
|
|
//slog("DSOrder: DSOrder($column, $mode)"); |
| 455 |
|
|
|
| 456 |
|
|
$this->attributename = $attributename; |
| 457 |
|
|
$this->order_ascdesc = $order_ascdesc; |
| 458 |
|
|
} |
| 459 |
|
|
|
| 460 |
|
|
/* |
| 461 |
|
|
function set($varname, $value) { |
| 462 |
|
|
$this->filterstring_parsed2 = str_replace(':' . $varname, "'$value'", $this->filterstring_parsed1); |
| 463 |
|
|
} |
| 464 |
|
|
*/ |
| 465 |
|
|
|
| 466 |
|
|
function getAttribute() { |
| 467 |
|
|
return ':' . $this->attributename; |
| 468 |
|
|
} |
| 469 |
|
|
function getOrderAscDesc() { |
| 470 |
|
|
return strtoupper($this->order_ascdesc); |
| 471 |
|
|
} |
| 472 |
|
|
|
| 473 |
|
|
} |
| 474 |
|
|
?> |
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