/**
* @param GraphSchema $schema
* @param null|int $seed
* @return Graph
*/
public function process(GraphSchema $schema, $seed = null)
{
$this->nodesByIdentifier = new ObjectCollection();
$this->nodes = new ObjectCollection();
$this->relationships = new ObjectCollection();
foreach ($schema->getNodes() as $node) {
$this->processNodeDefinition($node, $seed);
}
foreach ($schema->getRelationships() as $relationship) {
$this->processRelationshipDefinition($relationship, $seed);
}
$graph = new Graph();
$graph->setNodes($this->nodes);
$graph->setEdges($this->relationships);
$graph->setSchema($schema);
return $graph;
}