def query(self, **kwargs):
indexes = filter(self.__contains__, kwargs.keys())
results = (self[key].apply(value) for key, value in kwargs.items())
return ResultSet(
self,
reduce(lambda x, y: intersection(x, y)
if x and y else (), results))
def apply(self, cache, context=None):
results = []
for term in self.terms:
result = term.cached_apply(cache, context)
if not result:
# Empty results
return result
results.append(result)
if len(results) == 1:
return results[0]
# Sort results to have the smallest set first to optimize the
# set operation.
results.sort(key=lambda r: len(r))
result = results.pop(0)
for r in results:
if self.weighted:
_, result = weightedIntersection(result, r)
else:
result = intersection(result, r)
if not result:
# Empty results
return result
return result
def _reindex_doc(self, docid, text):
# Touch as few docid->w(docid, score) maps in ._wordinfo as possible.
old_wids = self.get_words(docid)
old_wid2w, old_docw = self._get_frequencies(old_wids)
new_wids = self._lexicon.sourceToWordIds(text)
new_wid2w, new_docw = self._get_frequencies(new_wids)
old_widset = IFTreeSet(old_wid2w.keys())
new_widset = IFTreeSet(new_wid2w.keys())
in_both_widset = intersection(old_widset, new_widset)
only_old_widset = difference(old_widset, in_both_widset)
only_new_widset = difference(new_widset, in_both_widset)
del old_widset, new_widset
for wid in only_old_widset.keys():
self._del_wordinfo(wid, docid)
for wid in only_new_widset.keys():
self._add_wordinfo(wid, new_wid2w[wid], docid)
for wid in in_both_widset.keys():
# For the Okapi indexer, the "if" will trigger only for words
# whose counts have changed. For the cosine indexer, the "if"
# may trigger for every wid, since W(d) probably changed and
# W(d) is divided into every score.
newscore = new_wid2w[wid]
if old_wid2w[wid] != newscore:
self._add_wordinfo(wid, newscore, docid)
self._docweight[docid] = new_docw
self._docwords[docid] = widcode.encode(new_wids)
return len(new_wids)
def apply(self, query):
"""see IIndexSearch.apply
expected query is a 2-tuple with datetime.datetime
Use case as following:
search:
q_start|--------------------|q_end
cases:
1) i_start|---------------------------|i_end
2) i_start|---------------|i_end
3) i_start|-----------------|i_end
4) i_start|-----|i_end
"""
if len(query) != 2 or not isinstance(query, tuple):
raise TypeError("two-length tuple expected", query)
q_start, q_end = query
###################################
# do 1) objects with "both outside"
#
# objects starting before q_start
query1_1 = (None, q_start)
res1_1 = self._i_start.apply(query1_1)
# objects ending after q_end
query1_2 = (q_end, None)
res1_2 = self._i_end.apply(query1_2)
res1 = intersection(res1_1, res1_2)
#####################################
# do 2) objects with "start inside"
#
query2 = (q_start, q_end)
res2 = self._i_start.apply(query2)
###################################
# do 3) objects with "end inside"
query3 = (q_start, q_end)
res3 = self._i_end.apply(query3)
###################################
# do 4) object where both are inside
# -> already found with 2) and 3) :-)
###################################
# union the three results
result = multiunion([res1, res2, res3])
return result
def intersection(self, *args):
from BTrees.IFBTree import intersection
return intersection(*args)
def intersect(self, r1, r2):
return r1 is None and r2 or intersection(r1, r2)
def intersect(self, r1, r2):
return r1 is None and r2 or intersection(r1, r2)
def query(self, **kwargs):
indexes = filter(self.__contains__, kwargs.keys())
results = (self[key].apply(value) for key, value in kwargs.items())
return ResultSet(self, reduce(
lambda x, y: intersection(x, y) if x and y else (), results))
