# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4

#
# LICENSE
#
# Copyright (c) 2010-2017, GEM Foundation, G. Weatherill, M. Pagani,
# D. Monelli.
#
# The Hazard Modeller's Toolkit is free software: you can redistribute
# it and/or modify it under the terms of the GNU Affero General Public
# License as published by the Free Software Foundation, either version
# 3 of the License, or (at your option) any later version.
#
# You should have received a copy of the GNU Affero General Public License
# along with OpenQuake. If not, see <http://www.gnu.org/licenses/>
#
# DISCLAIMER
# 
# The software Hazard Modeller's Toolkit (openquake.hmtk) provided herein
# is released as a prototype implementation on behalf of
# scientists and engineers working within the GEM Foundation (Global
# Earthquake Model).
#
# It is distributed for the purpose of open collaboration and in the
# hope that it will be useful to the scientific, engineering, disaster
# risk and software design communities.
#
# The software is NOT distributed as part of GEM’s OpenQuake suite
# (http://www.globalquakemodel.org/openquake) and must be considered as a
# separate entity. The software provided herein is designed and implemented
# by scientific staff. It is not developed to the design standards, nor
# subject to same level of critical review by professional software
# developers, as GEM’s OpenQuake software suite.
#
# Feedback and contribution to the software is welcome, and can be
# directed to the hazard scientific staff of the GEM Model Facility
# (hazard@globalquakemodel.org).
#
# The Hazard Modeller's Toolkit (openquake.hmtk) is therefore distributed 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.
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# The GEM Foundation, and the authors of the software, assume no
# liability for use of the software.

"""
Module :mod:`openquake.hmtk.parsers.source_model.base` defines an abstract base class
for :class:`SourceModelParser <BaseSourceModelParser>`.
"""
import abc
import os.path


class BaseSourceModelParser(object):
    """
    A base class for a Source Model Parser
    """
    __metaclass__ = abc.ABCMeta

    def __init__(self, input_file):
        """
        Initialise the object and check input file existance
        """
        self.input_file = input_file
        if not os.path.exists(self.input_file):
            raise IOError('File not found')

    @abc.abstractmethod
    def read_file(self, identifier, mfd_spacing=0.1,
            simple_mesh_spacing=1.0, complex_mesh_spacing=4.0,
            area_discretization=10.):
        """
        Return an instance of the class :class:`mtkSourceModel`
        """
