# -*- coding: utf-8 -*-
# goma
# ----
# Generic object mapping algorithm.
#
# Author: pbrisk <pbrisk_at_github@icloud.com>
# Copyright: 2016, 2017 Deutsche Postbank AG
# Website: https://github.com/pbrisk/goma
# License: APACHE Version 2 License (see LICENSE file)
from basematch import BaseMatch
[docs]class ExactMatch(BaseMatch):
[docs] def match(self, match_details, mapping_list):
""" matching based on exact entries of all columns of the
mapping list
Parameters:
match_details (list): holds the information based on which the mapping
should be conducted, a row entry is structured as
['Detail', 'Value']
mapping_list (list): holds the mapping information, the first row describes
the properties on which mapping should be conducted and
a column named target
start_col (int): starting column for the matching algorithms of the mapping_list
The exact match uses a given mapping_list, e.g
+-------------------------+------------+----------+
| Property1 | Property2 | Property3 | Target |
+============+============+============+==========+
| Value1_1 | Value2_1 | Value3_1 | Target1 |
+------------+------------+------------+----------+
| Value1_2 | Value2_2 | Value3_2 | Target2 |
+------------+------------+------------+----------+
Given the above tables, the matching searches row by row,
if all criteria in the matching list of a given list of
details (match_details) are met.
For a given list of match_details, e.g.
+------------+-----------+
| Property1 | Value1_2 |
+------------+-----------+
| Property2 | Value2_2 |
+------------+-----------+
| Property3 | Value3_2 |
+------------+-----------+
the match returns in a Target 2. If one matching criteria is not
met, the match returns None.
"""
match_obj = None
mapping_list_cols = [map_col for map_col in mapping_list[0]]
target_col = [i for i, name in enumerate(mapping_list[0]) if name == 'Target'][0]
for i in range(1, len(mapping_list)):
matches = 0
for j, attr in enumerate(mapping_list_cols[:-1]):
detail_value = None
for c in range(0, len(match_details)):
if match_details[c][0] == attr:
detail_value = match_details[c][1]
break
if detail_value != '':
if self._has_relation_operator(mapping_list[i][j]):
if self._apply_relation_match(mapping_list[i][j], detail_value):
matches += 1
else:
break
elif not detail_value:
break
elif type(detail_value)(mapping_list[i][j]) == detail_value:
matches += 1
else:
break
else:
break
if matches == len(mapping_list_cols[:-1]):
match_obj = mapping_list[i][target_col]
break
return match_obj