# -*- coding: utf-8 -*-
"""The BDE file entry implementation."""
from dfdatetime import filetime as dfdatetime_filetime
from dfvfs.lib import bde_helper
from dfvfs.lib import definitions
from dfvfs.lib import errors
from dfvfs.resolver import resolver
from dfvfs.vfs import root_only_file_entry
[docs]
class BDEFileEntry(root_only_file_entry.RootOnlyFileEntry):
"""File system file entry that uses pybde."""
TYPE_INDICATOR = definitions.TYPE_INDICATOR_BDE
[docs]
def __init__(
self, resolver_context, file_system, path_spec, is_root=False,
is_virtual=False):
"""Initializes the file entry object.
Args:
resolver_context (Context): resolver context.
file_system (FileSystem): file system.
path_spec (PathSpec): path specification.
is_root (Optional[bool]): True if the file entry is the root file entry
of the corresponding file system.
is_virtual (Optional[bool]): True if the file entry is a virtual file
Raises:
BackEndError: when the BDE volume is missing.
"""
bde_volume = file_system.GetBDEVolume()
if bde_volume is None:
raise errors.BackEndError('Missing BDE volume.')
super(BDEFileEntry, self).__init__(
resolver_context, file_system, path_spec, is_root=is_root,
is_virtual=is_virtual)
self._bde_volume = bde_volume
self.entry_type = definitions.FILE_ENTRY_TYPE_FILE
@property
def creation_time(self):
"""dfdatetime.DateTimeValues: creation time or None if not available."""
timestamp = self._bde_volume.get_creation_time_as_integer()
return dfdatetime_filetime.Filetime(timestamp=timestamp)
@property
def size(self):
"""int: size of the file entry in bytes or None if not available."""
return self._bde_volume.get_size()
[docs]
def IsLocked(self):
"""Determines if the file entry is locked.
Returns:
bool: True if the file entry is locked.
"""
return self._bde_volume.is_locked()
[docs]
def Unlock(self):
"""Unlocks the file entry.
Returns:
bool: True if the file entry was unlocked.
"""
return bde_helper.BDEUnlockVolume(
self._bde_volume, self.path_spec, resolver.Resolver.key_chain)