def and_operator(str, loc, toks):
"""
method to support logical 'and' operator expression
"""
# print str, loc, toks
# print toks[0][0::2]
and_filter = AndFilter()
for op_filter in toks[0][0::2]:
and_filter.child_add(op_filter)
return and_filter
def handle_filter_max_component_limit(handle, l_filter):
"""
Method checks the filter count and if the filter count exceeds
the max_components(number of filters), then the given filter
objects get distributed among small groups and then again binded
together in complex filters(like and , or) so that the
count of filters can be reduced.
"""
from ucscore import AbstractFilter
from ucsfiltertype import AndFilter, OrFilter
max_components = 10
if l_filter is None or l_filter.child_count() <= max_components:
return l_filter
if not isinstance(l_filter, AndFilter) and not isinstance(l_filter,
OrFilter):
return l_filter
result_filter = None
if isinstance(l_filter, AndFilter):
parent_filter = AndFilter()
child_filter = AndFilter()
parent_filter.child_add(child_filter)
for childf in l_filter.GetChild():
if isinstance(childf, AbstractFilter):
if child_filter.child_count() == max_components:
child_filter = AndFilter()
parent_filter.child_add(child_filter)
child_filter.child_add(childf)
result_filter = parent_filter
else:
parent_filter = OrFilter()
child_filter = OrFilter()
parent_filter.child_add(child_filter)
for childf in l_filter.GetChild():
if isinstance(childf, AbstractFilter):
if child_filter.child_count() == max_components:
child_filter = OrFilter()
parent_filter.child_add(child_filter)
child_filter.child_add(childf)
result_filter = parent_filter
return handle_filter_max_component_limit(handle, result_filter)
