public function getTree($node, $ontology)
{
$filename = getcwd() . "/cache/onto-" . urlencode($ontology->url) . ".json";
if (is_readable($filename)) {
return json_decode(file_get_contents($filename));
}
$count = new PrefixCounter($ontology->prefix);
$graph = new Graphite();
$xml = simplexml_load_file($ontology->url);
foreach ($xml->getNamespaces(true) as $prefix => $uri) {
$graph->ns($prefix, stripslashes($uri));
}
$graph->load($ontology->url);
$classes = $graph->allOfType("owl:Class");
$classes = $classes->append($graph->allOfType("rdfs:Class"));
$toplevel = $classes->except($classes->all("-rdfs:subClassOf"));
$json = array();
foreach ($toplevel as $class) {
$uri = $graph->shrinkUri($class);
$children = Ontology::getChildren($graph, $class, $count);
$count->step();
$json[] = array("id" => $count->value(), "text" => $uri, "iconCls" => "class", "children" => $children, "leaf" => empty($children));
}
file_put_contents($filename, json_encode($json));
return $json;
}
