def parseConditions(self, root):
"""
return an array of Condition objects
for example, from
<condition alias='C30'>
<variable name='gamma irradiation' value='false'/>
<variable name='time' value='30' units='minutes'/>
</condition>
<condition alias='G0'>
<variable name='gamma irradiation' value='true'/>
<variable name='time' value='0' units='minutes'/>
</condition>
string representation of the two resulting condition objects:
[note that no units ('None') are specified for irradiation]
condition: C30, gamma irradiation: false, None, time: 30, minutes
condition: G0 gamma irradiation: true, None time: 0, minutes
"""
conditionElements = root.getChildren("condition")
result = [] # use an array so that conditions can be stored in the
# order in which they appear in the file, which may
# reflect an order the user carefully created
for c in conditionElements:
alias = c.getAttribute("alias").value
assert alias
condition = Condition(alias)
for v in c.getChildren("variable"):
name = v.getAttribute("name").value
value = v.getAttribute("value").value
unitsAttribute = v.getAttribute("units")
units = None
if unitsAttribute:
units = unitsAttribute.value
condition.addVariable(Variable(name, value, units))
result.append(condition)
return result
