"""The CPIO path specification implementation."""

from dfvfs.lib import definitions
from dfvfs.path import factory
from dfvfs.path import location_path_spec


class CPIOPathSpec(location_path_spec.LocationPathSpec):
    """CPIO file path specification."""

    TYPE_INDICATOR = definitions.TYPE_INDICATOR_CPIO

    def __init__(self, location=None, parent=None, **kwargs):
        """Initializes a path specification.

        Note that the CPIO file path specification must have a parent.

        Args:
          location (Optional[str]): CPIO file internal location string prefixed
              with a path separator character.
          parent (Optional[PathSpec]): parent path specification.

        Raises:
          ValueError: when parent is not set.
        """
        if not parent:
            raise ValueError("Missing parent value.")

        super().__init__(location=location, parent=parent, **kwargs)


factory.Factory.RegisterPathSpec(CPIOPathSpec)
