/**
* Converts the database results into the desired output format
* and returns the result.
*
* @param array $arRecordSets Array of (possibly several) SQL query results.
* @param Erfurt_Sparql_Query $query SPARQL query object
* @param $engine Sparql Engine to query the database
* @return array
*/
public function convertFromDbResults($arRecordSets, Erfurt_Sparql_Query $query, $engine, $vars)
{
$result = parent::convertFromDbResults($arRecordSets, $query, $engine, $vars);
$xmlString = '<?xml version="1.0" encoding="UTF-8"?>' . PHP_EOL . '<sparql xmlns="http://www.w3.org/2005/sparql-results#">' . PHP_EOL . '<head>' . PHP_EOL;
if (isset($result['head']['vars'])) {
foreach ($result['head']['vars'] as $var) {
$xmlString .= '<variable name="' . $var . '" />' . PHP_EOL;
}
}
$xmlString .= '</head>' . PHP_EOL;
if (isset($result['boolean'])) {
$xmlString .= '<boolean>' . $result['boolean'] . '</boolean>' . PHP_EOL;
} else {
$xmlString .= '<results>' . PHP_EOL;
foreach ($result['results']['bindings'] as $row) {
$xmlString .= '<result>' . PHP_EOL;
foreach ($row as $key => $value) {
$xmlString .= '<binding name="' . $key . '">' . PHP_EOL;
if ($value['type'] === 'bnode') {
$xmlString .= '<bnode>' . $value['value'] . '</bnode>' . PHP_EOL;
} else {
if ($value['type'] === 'uri') {
$xmlString .= '<uri>' . $value['value'] . '</uri>' . PHP_EOL;
} else {
if ($value['type'] === 'typed-literal') {
$xmlString .= '<literal datatype="' . $value['datatype'] . '">' . $value['value'] . '</literal>' . PHP_EOL;
} else {
if (isset($value['xml:lang'])) {
$xmlString .= '<literal xml_lang="' . $value['xml:lang'] . '">' . $value['value'] . '</literal>' . PHP_EOL;
} else {
$xmlString .= '<literal>' . $value['value'] . '</literal>' . PHP_EOL;
}
}
}
}
$xmlString .= '</binding>' . PHP_EOL;
}
$xmlString .= '</result>' . PHP_EOL;
}
$xmlString .= '</results>' . PHP_EOL;
}
$xmlString .= '</sparql>' . PHP_EOL;
return $xmlString;
}
/**
* Converts the database results into the desired output format
* and returns the result.
*
* @param array $arRecordSets Array of (possibly several) SQL query results.
* @param Erfurt_Sparql_Query $query SPARQL query object
* @param $engine Sparql Engine to query the database
* @return array
*/
public function convertFromDbResults($arRecordSets, Erfurt_Sparql_Query $query, $engine, $vars)
{
$result = parent::convertFromDbResults($arRecordSets, $query, $engine, $vars);
return json_encode($result);
}
