def drs_from_raw_field(self, field: (str, str, str)) -> DRS:
"""
Given a field and source name, it returns a DRS with its representation
:param field: a tuple with the name of the field, (db_name, source_name, field_name)
:return: a DRS with the source-field internal representation
"""
db, source, field = field
nid = id_from(db, source, field)
h = Hit(nid, db, source, field, 0)
return self.drs_from_hit(h)
def _node_to_hit(self, node: (str, str, str)) -> Hit:
"""
Given a field and source name, it returns a Hit with its representation
:param node: a tuple with the name of the field,
(db_name, source_name, field_name)
:return: Hit
"""
db, source, field = node
nid = id_from(db, source, field)
hit = Hit(nid, db, source, field, 0)
return hit
def schema_neighbors(self, field: (str, str, str)) -> DRS:
"""
Returns all the other attributes/fields that appear in the same relation than the provided field
:param field: the provided field
:return: returns a list of Hit elements of the form (id, source_name, field_name, score)
"""
db_name, source_name, field_name = field
hits = self.__network.get_hits_from_table(source_name)
origin_hit = Hit(id_from(db_name, source_name, field_name), db_name, source_name, field_name, 0)
o_drs = DRS([x for x in hits], Operation(OP.TABLE, params=[origin_hit]))
return o_drs