protected function EasyRdf_Graph::getSingleProperty

Get a single value for a property of a resource

@ignore

Parameters

string $resource The URI of the resource (e.g. http://example.com/joe#me):

string $property The name of the property (e.g. foaf:name):

string $type The type of value to filter by (e.g. literal or resource):

string $lang The language to filter by (e.g. en):

Return value

mixed A value associated with the property

File

drupal/core/vendor/easyrdf/easyrdf/lib/EasyRdf/Graph.php, line 616

Class

EasyRdf_Graph

Container for collection of EasyRdf_Resources.

Code

protected function getSingleProperty($resource, $property, $type = null, $lang = null) {
  $this
    ->checkResourceParam($resource);
  $this
    ->checkSinglePropertyParam($property, $inverse);

  // Get an array of values for the property
  $values = $this
    ->propertyValuesArray($resource, $property, $inverse);
  if (!isset($values)) {
    return null;
  }

  // Filter the results
  $result = null;
  if ($type) {
    foreach ($values as $value) {
      if ($type == 'literal' and $value['type'] == 'literal') {
        if ($lang == null or isset($value['lang']) and $value['lang'] == $lang) {
          $result = $value;
          break;
        }
      }
      elseif ($type == 'resource') {
        if ($value['type'] == 'uri' or $value['type'] == 'bnode') {
          $result = $value;
          break;
        }
      }
    }
  }
  else {
    $result = $values[0];
  }

  // Convert the internal data structure into a PHP object
  return $this
    ->arrayToObject($result);
}