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R3600/modules/bibrank/lib/bibrank_citation_searcher.py
bd1af89db038maint-1.2

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bibrank_citation_searcher.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
__revision__ = "$Id$"
import re
from invenio.dbquery import run_sql, get_table_update_time, OperationalError, \
deserialize_via_marshal
from invenio.intbitset import intbitset
from invenio.data_cacher import DataCacher
class CitationDictsDataCacher(DataCacher):
"""
Cache holding all citation dictionaries (citationdict,
reversedict, selfcitdict, selfcitedbydict).
"""
def __init__(self):
def cache_filler():
alldicts = {}
try:
res = run_sql("SELECT object_name,object_value FROM rnkCITATIONDATA")
except OperationalError:
# database problems, return empty cache
return {}
for row in res:
object_name = row[0]
object_value = row[1]
try:
object_value_dict = deserialize_via_marshal(object_value)
except:
object_value_dict = {}
alldicts[object_name] = object_value_dict
if object_name == 'citationdict':
# for cited:M->N queries, it is interesting to cache also
# some preprocessed citationdict:
alldicts['citationdict_keys'] = object_value_dict.keys()
alldicts['citationdict_keys_intbitset'] = intbitset(object_value_dict.keys())
return alldicts
def timestamp_verifier():
res = run_sql("""SELECT DATE_FORMAT(last_updated, '%Y-%m-%d %H:%i:%s')
FROM rnkMETHOD WHERE name='citation'""")
if res:
return res[0][0]
else:
return '0000-00-00 00:00:00'
DataCacher.__init__(self, cache_filler, timestamp_verifier)
try:
cache_citation_dicts.is_ok_p
except Exception:
cache_citation_dicts = CitationDictsDataCacher()
def get_citation_dict(dictname):
"""Return cached value of a citation dictionary. DICTNAME can be
citationdict, reversedict, selfcitdict, selfcitedbydict.
"""
cache_citation_dicts.recreate_cache_if_needed()
return cache_citation_dicts.cache.get(dictname, {})
def get_cited_by(recordid):
"""Return a list of records that cite recordid"""
ret = []
cache_cited_by_dictionary = get_citation_dict("citationdict")
if cache_cited_by_dictionary.has_key(recordid):
ret = cache_cited_by_dictionary[recordid]
return ret
def get_cited_by_count(recordid):
"""Return how many records cite given RECORDID."""
cache_cited_by_dictionary = get_citation_dict("citationdict")
return len(cache_cited_by_dictionary.get(recordid, []))
def get_records_with_num_cites(numstr, allrecs = intbitset([])):
"""Return an intbitset of record IDs that are cited X times,
X defined in numstr.
Warning: numstr is string and may not be numeric! It can
be 10,0->100 etc
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
cache_cited_by_dictionary_keys = get_citation_dict("citationdict_keys")
cache_cited_by_dictionary_keys_intbitset = get_citation_dict("citationdict_keys_intbitset")
matches = intbitset([])
#once again, check that the parameter is a string
if not (type(numstr) == type("thisisastring")):
return intbitset([])
numstr = numstr.replace(" ",'')
numstr = numstr.replace('"','')
num = 0
#first, check if numstr is just a number
singlenum = re.findall("(^\d+$)", numstr)
if singlenum:
num = int(singlenum[0])
if num == 0:
#we return recids that are not in keys
return allrecs - cache_cited_by_dictionary_keys_intbitset
for k in cache_cited_by_dictionary_keys:
li = cache_cited_by_dictionary[k]
if len(li) == num:
matches.add(k)
return matches
#try to get 1->10 or such
firstsec = re.findall("(\d+)->(\d+)", numstr)
if firstsec:
first = 0
sec = -1
try:
first = int(firstsec[0][0])
sec = int(firstsec[0][1])
except:
return intbitset([])
if (first == 0):
#start with those that have no cites..
matches = allrecs - cache_cited_by_dictionary_keys_intbitset
if (first <= sec):
for k in cache_cited_by_dictionary_keys:
li = cache_cited_by_dictionary[k]
if len(li) >= first:
if len(li) <= sec:
matches.add(k)
return matches
firstsec = re.findall("(\d+)\+", numstr)
if firstsec:
first = firstsec[0]
for k in cache_cited_by_dictionary_keys:
li = cache_cited_by_dictionary[k]
if len(li) > int(first):
matches.add(k)
return matches
def get_cited_by_list(recordlist):
"""Return a tuple of ([recid,list_of_citing_records],...) for all the
records in recordlist.
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
result = []
for recid in recordlist:
result.append([recid, cache_cited_by_dictionary.get(recid, [])])
return result
def get_refersto_hitset(ahitset):
"""
Return a hitset of records that refers to (cite) some records from
the given ahitset. Useful for search engine's
refersto:author:ellis feature.
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
out = intbitset()
if ahitset:
try:
for recid in ahitset:
out = out | intbitset(cache_cited_by_dictionary.get(recid, []))
except OverflowError:
# ignore attempt to iterate over infinite ahitset
pass
return out
def get_citedby_hitset(ahitset):
"""
Return a hitset of records that are cited by records in the given
ahitset. Useful for search engine's citedby:author:ellis feature.
"""
cache_cited_by_dictionary = get_citation_dict("reversedict")
out = intbitset()
if ahitset:
try:
for recid in ahitset:
out = out | intbitset(cache_cited_by_dictionary.get(recid, []))
except OverflowError:
# ignore attempt to iterate over infinite ahitset
pass
return out
def get_cited_by_weight(recordlist):
"""Return a tuple of ([recid,number_of_citing_records],...) for all the
records in recordlist.
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
result = []
for recid in recordlist:
result.append([recid, len(cache_cited_by_dictionary.get(recid, []))])
return result
def calculate_cited_by_list(record_id, sort_order="d"):
"""Return a tuple of ([recid,citation_weight],...) for all the
record citing RECORD_ID. The resulting recids is sorted by
ascending/descending citation weights depending or SORT_ORDER.
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
citation_list = []
result = []
# determine which record cite RECORD_ID:
if cache_cited_by_dictionary:
citation_list = cache_cited_by_dictionary.get(record_id, [])
#add weights i.e. records that cite each of the entries in citation_list
for c in citation_list:
ccited = cache_cited_by_dictionary.get(c, [])
result.append([c, len(ccited)])
# sort them:
if result:
if sort_order == "d":
result.sort(lambda x, y: cmp(y[1], x[1]))
else:
result.sort(lambda x, y: cmp(x[1], y[1]))
return result
def get_author_cited_by(authorstring):
"""Return a list of doc ids [y1,y2,..] for the
author given as param, such that y1,y2.. cite that author
"""
citations = []
res = run_sql("select hitlist from rnkAUTHORDATA where aterm=%s",
(authorstring,))
if res and res[0] and res[0][0]:
#has to be prepared for corrupted data!
try:
citations = deserialize_via_marshal(res[0][0])
except:
citations = []
return citations
def get_self_cited_by(record_id):
"""Return a list of doc ids [y1,y2,..] for the
rec id x given as param, so that x cites y1,y2,.. and x and each y share an author
"""
cache_selfcit_dictionary = get_citation_dict("selfcitdict")
result = []
if cache_selfcit_dictionary and cache_selfcit_dictionary.has_key(record_id):
result.extend(cache_selfcit_dictionary[record_id])
if not result:
return None
return result
def get_self_cited_in(record_id):
"""Return a list of doc ids [y1,y2,..] for the
rec id x given as param, so that x is cited in y1,y2,.. and x and each y share an author
"""
cache_selfcitedby_dictionary = get_citation_dict("selfcitedbydict")
result = []
if cache_selfcitedby_dictionary and cache_selfcitedby_dictionary.has_key(record_id):
result.extend(cache_selfcitedby_dictionary[record_id])
if not result:
return None
return result
def calculate_co_cited_with_list(record_id, sort_order="d"):
"""Return a tuple of ([recid,co-cited weight],...) for records
that are co-cited with RECORD_ID. The resulting recids is sorted by
ascending/descending citation weights depending or SORT_ORDER.
"""
cache_cited_by_dictionary = get_citation_dict("citationdict")
cache_reference_list_dictionary = get_citation_dict("reversedict")
result = []
result_intermediate = {}
citation_list = []
if cache_cited_by_dictionary:
citation_list = cache_cited_by_dictionary.get(record_id, [])
for cit_id in citation_list:
reference_list = []
if cache_reference_list_dictionary:
reference_list = cache_reference_list_dictionary.get(cit_id, [])
for ref_id in reference_list:
if not result_intermediate.has_key(ref_id):
result_intermediate[ref_id] = 1
else: result_intermediate[ref_id] += 1
for key, value in result_intermediate.iteritems():
if not (key==record_id):
result.append([key, value])
if result:
if sort_order == "d":
result.sort(lambda x, y: cmp(y[1], x[1]))
else:
result.sort(lambda x, y: cmp(x[1], y[1]))
return result
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