def frag_flow_lcia(fragmentflows,
quantity_ref,
scenario=None,
refresh=False,
ignore_uncached=True):
"""
Recursive function to compute LCIA of a traversal record contained in a set of Fragment Flows.
:param fragmentflows:
:param quantity_ref:
:param scenario: necessary if any remote traversals are required
:param refresh: whether to refresh the LCIA CFs
:param ignore_uncached: [True] whether to allow zero scores for un-cached, un-computable fragments
:return:
"""
result = LciaResult(quantity_ref)
for ff in fragmentflows:
if ff.term.is_null:
continue
node_weight = ff.node_weight
if node_weight == 0:
continue
try:
v = ff.term.score_cache(quantity=quantity_ref,
refresh=refresh,
ignore_uncached=ignore_uncached)
except SubFragmentAggregation:
# if we were given interior fragments, recurse on them. otherwise ask remote.
if len(ff.subfragments) == 0:
v = ff.term.term_node.fragment_lcia(quantity_ref,
scenario=scenario,
refresh=refresh)
else:
v = frag_flow_lcia(ff.subfragments,
quantity_ref,
refresh=refresh)
if v.is_null:
continue
if ff.term.direction == ff.fragment.direction:
# if the directions collide (rather than complement), the term is getting run in reverse
node_weight *= -1
result.add_summary(ff.fragment.uuid, ff, node_weight, v)
return result
def add_lcia_score(self, quantity, score, scenario=None):
res = LciaResult(quantity, scenario=scenario)
res.add_summary(self._parent.uuid, self._parent, 1.0, score)
self._score_cache.add(res)