Source code for openquake.hmtk.parsers.catalogue.base

# -*- coding: utf-8 -*-
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# D. Monelli.
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"""
Module :mod:`openquake.hmtk.parsers.catalogue.base` defines an abstract base
class for :class:`CatalogueParser <BaseCatalogueParser>`.
"""
import abc
import os.path


[docs]class BaseCatalogueParser(object):
    """
    A base class for a Catalogue Parser
    """

    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: %s" % input_file)

[docs]    @abc.abstractmethod
    def read_file(self):
        """
        Return an instance of the class :class:`Catalogue`
        """


[docs]class BaseCatalogueWriter(object):
    """
    A base class for a Catalogue writer
    """

    def __init__(self, output_file):
        """
        Initialise the object and check output file existance. If file already
        exists then raise error
        """
        self.output_file = output_file
        if os.path.exists(self.output_file):
            raise IOError(
                "Catalogue output file %s already exists!" % self.output_file
            )

[docs]    @abc.abstractmethod
    def write_file(self):
        """
        Return an instance of the class :class:`Catalogue`
        """