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mat2/src/parser_factory.py

38 lines
952 B
Python

import mimetypes
import importlib
import pkgutil
from . import abstract
from typing import TypeVar
T = TypeVar('T', bound='abstract.AbstractParser')
# This loads every parser in a dynamic way
for module_loader, name, ispkg in pkgutil.walk_packages('.src'):
if not name.startswith('src.'):
continue
elif name == 'src.abstract':
continue
importlib.import_module(name)
def _get_parsers() -> list:
""" Get all our parsers!"""
def __get_parsers(cls):
return cls.__subclasses__() + \
[g for s in cls.__subclasses__() for g in __get_parsers(s)]
return __get_parsers(abstract.AbstractParser)
def get_parser(filename: str) -> (T, str):
mtype, _ = mimetypes.guess_type(filename)
for c in _get_parsers():
if mtype in c.mimetypes:
try:
return c(filename), mtype
except ValueError:
return None, mtype
return None, mtype