Parse Tree

parseTree.cls

class Node{
  Id value;
  List<Node> children;
  {
     children = new List<Node>();
  }
}

parseTree( Map<String,List<Id>>  treeMap,String parentId){

	List<Id> childrenNode childrenNode = treeMap.get(parentId);
	Node parenNode = new Node();
	parenNode.value = parentId;
	
	for(Id childId:childrenNode){
		parenNode.children.add(   parseTree(treeMap,childId) );
	}
	
	return parenNode;
}