Source code for httk.atomistic.models.protopattern.label_string

"""Backend wrapping a raw canonical protopattern label string."""

from typing import Any, Self

from httk.atomistic.models.protopattern.backend import ProtopatternBackend
from httk.atomistic.models.protopattern.notation import try_parse_protopattern




class ProtopatternLabelString(ProtopatternBackend):
    r"""Wrap a canonical protopattern label held as a plain string.

    The string must be a canonical unsuffixed protopattern label (no ``:`` species
    suffix); anything else is declined. Parsing is eager, so the wrapped value is
    validated at adoption.

    :param obj: The canonical protopattern label text.
    :param \*\*hints: Backend-selection hints.
    """



    kind = "protopattern"

    _raw: str

    @classmethod
    def _backend_adopt(cls, obj: Any, **hints: Any) -> Self | None:
        r"""Adopt a canonical protopattern label string.

        :param obj: The source object to adopt.
        :param \**hints: Backend-selection hints.
        :return: An initialized backend, or ``None`` when this backend declines ``obj``.
        """
        if hints and hints.get("kind", "protopattern") != "protopattern":
            return None
        if not isinstance(obj, str):
            return None
        if try_parse_protopattern(obj) is None:
            return None
        return cls(obj, **hints)

    def __init__(self, obj: str, **hints: Any) -> None:
        self._raw = obj
        parsed = try_parse_protopattern(obj)
        assert parsed is not None  # _backend_adopt guarantees a canonical label
        self._value = parsed

    @property


    def spacegroup(self):
        """Return the standard-setting space group of the parsed label."""
        return self._value.spacegroup


    @property


    def occupations(self):
        """Return the class-partitioned occupations of the parsed label."""
        return self._value.occupations




    def unwrap(self) -> str:
        """Return the original label text."""
        return self._raw