def readEvent(self,xml):
label = self.readTerm(xml.find('label'))
compromisetype = self.readText(xml.find('compromisetype'))
follows = xml.findall('follows')
bindinglist = []
for follow in follows:
follaf = follow.find('after')
if follaf == None:
# Ignore follow definitions that do not contain after
continue
follev = (int(follaf.get('run')),int(follaf.get('index')))
# Parse and store the binding label
blabel = self.readTerm(follow)
if blabel != None:
binding = (follev,blabel)
bindinglist.append(binding)
(etype,index) = (xml.get('type'),int(xml.get('index')))
if etype in ('send','read','recv'):
fr = self.readTerm(xml.find('from'))
to = self.readTerm(xml.find('to'))
message = self.readTerm(xml.find('message'))
if (etype == 'send'):
return Trace.EventSend(index,label,fr,to,message,compromisetype=compromisetype,bindinglist=bindinglist)
else:
return Trace.EventRead(index,label,fr,to,message,compromisetype=compromisetype,bindinglist=bindinglist)
elif xml.get('type') == 'claim':
role = self.readTerm(xml.find('role'))
etype = self.readTerm(xml.find('type'))
argument = self.readTerm(xml.find('argument'))
# Freshness claims are implemented as Empty claims with
# (Fresh,Value) as arguments
try:
if etype == 'Empty' and argument[0] == 'Fresh':
etype = Term.TermConstant('Fresh')
argument = argument[1]
elif etype == 'Empty' and argument[0] == 'Compromised':
etype = Term.TermConstant('Compromised')
argument = argument[1]
except:
pass
return Trace.EventClaim(index,label,role,etype,argument,compromisetype=compromisetype,bindinglist=bindinglist)
else:
raise Trace.InvalidAction, "Invalid action in XML: %s" % (xml.get('type'))
