public function EasyRdf_Graph::add

Add data to the graph

The resource can either be a resource or the URI of a resource.

Example: $graph->add("http://www.example.com", 'dc:title', 'Title of Page');

Parameters

mixed $resource The resource to add data to:

mixed $property The property name:

mixed $value The new value for the property:

Return value

integer The number of values added (1 or 0)

File

drupal/core/vendor/easyrdf/easyrdf/lib/EasyRdf/Graph.php, line 910

Class

EasyRdf_Graph

Container for collection of EasyRdf_Resources.

Code

public function add($resource, $property, $value) {
  $this
    ->checkResourceParam($resource);
  $this
    ->checkSinglePropertyParam($property, $inverse);
  $this
    ->checkValueParam($value);

  // No value given?
  if ($value === null) {
    return 0;
  }

  // Check that the value doesn't already exist
  if (isset($this->index[$resource][$property])) {
    foreach ($this->index[$resource][$property] as $v) {
      if ($v == $value) {
        return 0;
      }
    }
  }
  $this->index[$resource][$property][] = $value;

  // Add to the reverse index if it is a resource
  if ($value['type'] == 'uri' or $value['type'] == 'bnode') {
    $uri = $value['value'];
    $this->revIndex[$uri][$property][] = array(
      'type' => substr($resource, 0, 2) == '_:' ? 'bnode' : 'uri',
      'value' => $resource,
    );
  }

  // Success
  return 1;
}