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bibauthorid_general_functions.py
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Fri, Dec 13, 20:15

bibauthorid_general_functions.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2011 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.
"""
bibauthorid_general_functions
Provides the plug-in (module) functionality and handles the final chaining
of the comparison functions in the modules which result in a final
probability of a virtual author belonging to a real author entity.
"""
import glob
import os.path as osp
import sys
import bibauthorid_config as bconfig
def cmp_virtual_to_real_author(va_id, ra_id):
"""
Chain function to compare a virtualauthor to a realauthor.
Functions are specified in the config file and are chained
and weighted as specified in the configfile.
config file entry in format: function_name,[+|*],[0..1]
the last two parameters are optional
@param va_id: The ID of the virtual author
@type va_id: in
@param ra_id: The ID of the real author to compare to
@return: The probability of the compatability of VA and RA
@rtype: float
"""
module = None
module_paths = glob.glob(bconfig.MODULE_PATH)
if not module_paths:
bconfig.LOGGER.exception("Sorry, no modules found for comparison.")
raise Exception('ModuleError')
sum_count = 1.0
sum_result = 0.0
mult_result = 1.0
decrease_sum_counter = -1
comparison_result_str = "RA: %s" % (ra_id)
# consideration_threshold = float(
# get_config_parameter('CONSIDERATION_THRESHOLD')[0])
consideration_threshold = bconfig.CONSIDERATION_THRESHOLD
if consideration_threshold == "-1":
return - 1
for module_path in module_paths:
module_id = osp.splitext(osp.basename(module_path))[0]
module = None
module_import_name = ("bibauthorid_comparison_functions.%s"
% (module_id))
try:
__import__(module_import_name)
module = sys.modules[module_import_name]
except ImportError, err:
bconfig.LOGGER.exception("Error while importing %s" % (module_id))
print err
continue
module_name = ""
module_operator = ""
module_weight = 0.0
try:
module_name = module.MODULE_NAME
except AttributeError:
module_name = "Default Module Name"
try:
module_operator = module.MODULE_OPERATOR
except AttributeError:
module_operator = "+"
try:
module_weight = module.MODULE_WEIGHT
except AttributeError:
module_weight = 1.0
# comparison_result_str = "%s, %s:" % (comparison_result_str,
# module_name)
chain_link_result = -1
try:
chain_link_result = module.compare_va_to_ra(va_id, ra_id)
except AttributeError:
bconfig.LOGGER.info("The module %s does not have a comparison"
" method. Please check your files!"
% (module_id))
if chain_link_result >= consideration_threshold:
if module_operator == '+':
sum_count += 1
sum_result += float(module_weight) * float(chain_link_result)
elif module_operator == '*':
mult_result *= float(module_weight) * float(chain_link_result)
comparison_result_str = "%s %s %s %.2f*%.2f" % (comparison_result_str,
module_operator,
module_name,
float(module_weight),
float(chain_link_result))
if sum_count == 0.0:
sum_count = 1.0
if sum_count > 2.0:
sum_count = sum_count - 1
if decrease_sum_counter > -1:
sum_count -= decrease_sum_counter
comparison_result = (sum_result / sum_count) * mult_result
bconfig.LOGGER.log(25, "|--> Final comparison: [%s] => %s / %s = %s"
% (comparison_result_str, sum_count * comparison_result,
sum_count, comparison_result))
return comparison_result

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