/**
* Query the database with the given SPARQL query.
*
* @param Erfurt_SparqlQuery $query Parsed SPARQL query.
* @param string $resultform Result form. If set to 'xml' the result will be
* SPARQL Query Results XML Format as described in @link http://www.w3.org/TR/rdf-sparql-XMLres/.
*
* @return array/string array of triple arrays, or XML.
* Format depends on $resultform parameter.
*/
public function queryModel(Erfurt_Sparql_Query $query, $resultform = 'plain')
{
$this->query = $query;
require_once 'Erfurt/Sparql/EngineDb/QuerySimplifier.php';
$qsimp = new Erfurt_Sparql_EngineDb_QuerySimplifier();
$qsimp->simplify($this->query);
require_once 'Erfurt/Sparql/EngineDb/QueryOptimizer.php';
$queryOptimizer = new Erfurt_Sparql_EngineDb_QueryOptimizer($this);
$result = $queryOptimizer->optimize($this->query);
if ($result instanceof Erfurt_Sparql_Query) {
$this->query = $result;
}
$resultform = strtolower($resultform);
switch ($resultform) {
case 'xml':
require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/Xml.php';
$rc = new Erfurt_Sparql_EngineDb_ResultRenderer_Xml();
break;
//require_once 'Erfurt/Exception.php';
//throw new Erfurt_Exception('XML result format not supported yet.');
//require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/EfZendDb/Xml.php';
//$this->rc = new Erfurt_Sparql_EngineDb_ResultRenderer_RapZendDb_Xml();
//break;
//require_once 'Erfurt/Exception.php';
//throw new Erfurt_Exception('XML result format not supported yet.');
//require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/EfZendDb/Xml.php';
//$this->rc = new Erfurt_Sparql_EngineDb_ResultRenderer_RapZendDb_Xml();
//break;
case 'extended':
require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/Extended.php';
$rc = new Erfurt_Sparql_EngineDb_ResultRenderer_Extended();
break;
case 'json':
require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/Json.php';
$rc = new Erfurt_Sparql_EngineDb_ResultRenderer_Json();
break;
case 'plain':
default:
require_once 'Erfurt/Sparql/EngineDb/ResultRenderer/Plain.php';
$rc = new Erfurt_Sparql_EngineDb_ResultRenderer_Plain();
}
if (is_array($result)) {
$result = $rc->convertFromDbResults($result['data'], $this->query, $this, $result['vars']);
return $result;
}
require_once 'Erfurt/Sparql/EngineDb/SqlGenerator/Adapter/Ef.php';
$this->sg = new Erfurt_Sparql_EngineDb_SqlGenerator_Adapter_Ef($this->query, $this->arModelIdMapping);
require_once 'Erfurt/Sparql/EngineDb/TypeSorter.php';
$this->ts = new Erfurt_Sparql_EngineDb_TypeSorter($this->query, $this);
$this->_setOptions();
$arSqls = $this->sg->createSql();
#var_dump($arSqls);exit;
$this->ts->setData($this->sg);
return $rc->convertFromDbResults($this->_queryMultiple($this->ts->getOrderifiedSqls($arSqls)), $this->query, $this, $this->sg->arVarAssignments);
}
/**
* Create a prepared statement that can be executed later.
*
* @param Dataset $dataset RDF Dataset
* @param Query $query Parsed SPARQL query
*
* @return SparqlEngineDb_PreparedStatement Prepared statment that can
* be execute()d later.
*/
public function prepare(Dataset $dataset, Query $query)
{
require_once RDFAPI_INCLUDE_DIR . 'sparql/SparqlEngineDb/PreparedStatement.php';
require_once RDFAPI_INCLUDE_DIR . 'sparql/SparqlEngineDb/Preparator.php';
$this->query = $query;
$this->dataset = $dataset;
$this->sg = new SparqlEngineDb_SqlGenerator($this->query, $this->dbConn, $this->arModelIds);
$this->rc = new SparqlEngineDb_ResultConverter($this->query, $this->sg, $this);
$this->ts = new SparqlEngineDb_TypeSorter($this->query, $this->dbConn);
$this->pr = new SparqlEngineDb_Preparator($this->query, $this->dbConn);
$this->arPrepared = $this->sg->createSql();
$this->ts->setData($this->sg);
if ($this->ts->willBeDataDependent()) {
$this->bRealPrepared = false;
} else {
$this->bRealPrepared = true;
list($strSelect, $strFrom, $strWhere) = $this->arPrepared;
$this->arPreparedQueries = $this->ts->getOrderifiedSqls($strSelect, $strFrom, $strWhere);
$this->arDbStatements = $this->pr->prepareInDb($this->arPreparedQueries, $this->sg->getPlaceholders());
}
return new SparqlEngineDb_PreparedStatement($this);
}
