DOF_Manager QGIS plugin (2) - inserting parsed data into PostGIS database

This post won't be revealing if you familiar with previous posts related to insert data into database.

Method dof_dat_file2postgis simply reads each line of the data file, parse it and after parsing 10 000 lines (or all file if there is less lines) into database.  Notice, that before executing inert satatement parsed data is validated by method check_dof_parsed_data(), which at this satge does nothing and will be completed in the next post.:

Dealing with obstacles data stored in CSV files (2) - validating parsed data

Data should be checked - e. g. coordinates have 'sense' before inserting it into database.
In this post I am  going to write method which checks data in terms of constraint imposed by our model of obstacle database.