function get_candidate_values($pool_uri, $max = 5)
{
if (!isset($this->bigfootSparqlService)) {
$bigfoot = new Store(STORE_URI);
$this->bigfootSparqlService = $bigfoot->get_sparql_service();
}
$query = "PREFIX p: <http://purl.org/vocab/value-pools/schema#> CONSTRUCT {<{$pool_uri}> p:value ?v . } WHERE { <{$pool_uri}> p:value ?v . } LIMIT {$max}";
$triples = $this->bigfootSparqlService->graph_to_triple_list($query);
$candidates = array();
if (is_array($triples)) {
foreach ($triples as $triple) {
if ($triple['p'] = 'http://purl.org/vocab/value-pools/schema#value' && $triple['o_type'] == 'literal') {
array_push($candidates, $triple['o']);
}
}
}
return $candidates;
}
/**
* Runs the constructed query and returns the results as an instance of DataTableResult
*/
function get()
{
$store = new Store($this->_store_uri, $this->_credentials, $this->_request_factory);
$ss = $store->get_sparql_service();
$query = $this->get_sparql();
$response = $ss->query($query, 'json');
if ($response->is_success()) {
return new DataTableResult($response->body, $this->_subject);
} else {
//trigger_error("SPARQL query failed with HTTP result " . $response->status_code. " and body " . $response->to_string(), E_USER_WARNING);
return new DataTableResult('{"head": {"vars": [ ] } , "results": { "bindings": [] } }', $this->_subject);
}
}
function test_get_sparql_service_sets_credentials()
{
$credentials = new Credentials('scooby', 'shaggy');
$store = new Store("http://example.org/store", $credentials);
$this->assertEquals($credentials, $store->get_sparql_service()->credentials);
}