Module hoshmap.value.strictival

#  Copyright (c) 2021. Davi Pereira dos Santos
#  This file is part of the hoshmap project.
#  Please respect the license - more about this in the section (*) below.
#
#  hoshmap is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  hoshmap is distributed in the hope that it will be useful,
#  but 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.
#
#  You should have received a copy of the GNU General Public License
#  along with hoshmap.  If not, see <http://www.gnu.org/licenses/>.
#
#  (*) Removing authorship by any means, e.g. by distribution of derived
#  works or verbatim, obfuscated, compiled or rewritten versions of any
#  part of this work is illegal and it is unethical regarding the effort and
#  time spent here.
#
import pickle
from typing import Union

from hosh import Hosh

from hoshmap.value.ival import iVal


class StrictiVal(iVal):
    """
    Identified value

    >>> StrictiVal(2)
    2
    """

    def __init__(self, value, id: Union[str, Hosh] = None):
        self.value = value
        if id is None:
            if hasattr(value, "hosh"):
                self.hosh = value.hosh
            else:
                try:
                    self.hosh = Hosh(pickle.dumps(value, protocol=5))
                except TypeError as e:
                    raise Exception(f"Cannot pickle. Pickling is needed to hosh idict values ({value}): {e}")
        else:
            self.hosh = self.handle_id(id)
        self.results = {self.hosh.id: value}

    def __repr__(self):
        return repr(self.value)