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   1  <?php
   2  
   3  final class CelerityResourceGraph extends AbstractDirectedGraph {
   4  
   5    private $resourceGraph = array();
   6    private $graphSet = false;
   7  
   8    protected function loadEdges(array $nodes) {
   9      if (!$this->graphSet) {
  10        throw new Exception(
  11          'Call setResourceGraph before loading the graph!'
  12        );
  13      }
  14  
  15      $graph = $this->getResourceGraph();
  16      $edges = array();
  17      foreach ($nodes as $node) {
  18        $edges[$node] = idx($graph, $node, array());
  19      }
  20      return $edges;
  21    }
  22  
  23    final public function setResourceGraph(array $graph) {
  24      $this->resourceGraph = $graph;
  25      $this->graphSet = true;
  26      return $this;
  27    }
  28  
  29    private function getResourceGraph() {
  30      return $this->resourceGraph;
  31    }
  32  }