#!/usr/bin/python -u
import libxml2

class federated_virtual_topology:
    class callback:
	def __init__(self):
	    self.experiment = { };
	    self.in_node=0;
	    self.in_lan=0;
	    self.rows = []
	    self.row = { }
	    self.node_fields = set(["vname", "ips"]);
	    self.lan_fields = set(["vname", "vnode", "bandwidth", "delay", "member", "ip"]);
	    self.long_fields = set(["bandwidth"]);
	    self.float_fields = set(["delay"]);
	    self.last_chars = "";
	    pass

	def startDocument(self):
	    pass

	def endDocument(self):
	    pass

	def startElement(self, tag, attrs):
	    if ( tag == "node"):
		self.in_node = 1
	    elif tag == "lan":
		self.in_lan = 1
	    pass

	def endElement(self, tag):
	    if self.in_node >0 :
		if tag in self.node_fields :
		    if tag in self.long_fields:
			self.row[tag] = long(self.last_chars);
		    elif tag in self.float_fields:
			self.row[tag] = float(self.last_chars);
		    else:
		        self.row[tag] = self.last_chars;
		    pass
		    self.last_chars = "";
		pass
		if tag == "node":
		    # end of a row
		    self.rows.append(self.row);
		    self.row = { };
		    self.in_node=0
		pass
	    pass
	    if tag == "nodes": 
		self.experiment["nodes"] = self.rows;
		self.rows = [];
	    pass
	    if self.in_lan >0 :
		if tag in self.lan_fields :
		    if tag in self.long_fields:
			self.row[tag] = long(self.last_chars);
		    elif tag in self.float_fields:
			self.row[tag] = float(self.last_chars);
		    else:
		        self.row[tag] = self.last_chars;
		    pass
		    self.last_chars = "";
		pass
		if tag == "lan":
		    # end of a row
		    self.rows.append(self.row);
		    self.row = { };
		    self.in_lan=0
		pass
	    pass
	    if tag == "lans": 
		self.experiment["lans"] = self.rows;
		self.rows = [];
	    pass

	def characters(self, data):
	    self.last_chars = data;
	    pass

	def warning(self, msg):
	    print "Warning: %s!" %  msg
	    pass

	def error(self, msg):
	    print "Error: %s!" %  msg
	    pass

	def fatalError(self, msg):
	    global log
	    print "fatalError: %s:" % (msg)

    def __init__(self, file):
	self.handler = self.callback()
	self.rv = { };
	libxml2.SAXParseFile(self.handler, file, 0);
	self.rv["experiment"] = self.handler.experiment;
	libxml2.cleanupParser()
	pass
pass

if __name__ == "__main__":
    import sys;
    parse = federated_virtual_topology(sys.argv[1]);
    print parse.rv
pass