rename property module to fsproperty

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>
This commit is contained in:
Steven Armstrong 2011-10-10 16:37:56 +02:00
parent 0963237321
commit 915ec6d9ad

View file

@ -40,17 +40,17 @@ class FileList(collections.MutableSequence):
def __init__(self, path, initial=None): def __init__(self, path, initial=None):
if not os.path.isabs(path): if not os.path.isabs(path):
raise AbsolutePathRequiredError(path) raise AbsolutePathRequiredError(path)
self._path = path self.path = path
if initial: if initial:
# delete existing file # delete existing file
os.unlink(self._path) os.unlink(self.path)
for i in initial: for i in initial:
self.append(i) self.append(i)
def __read(self): def __read(self):
lines = [] lines = []
try: try:
with open(self._path) as fd: with open(self.path) as fd:
for line in fd: for line in fd:
lines.append(line.rstrip('\n')) lines.append(line.rstrip('\n'))
except EnvironmentError as e: except EnvironmentError as e:
@ -60,7 +60,7 @@ class FileList(collections.MutableSequence):
def __write(self, lines): def __write(self, lines):
try: try:
with open(self._path, 'w') as fd: with open(self.path, 'w') as fd:
for line in lines: for line in lines:
fd.write(str(line) + '\n') fd.write(str(line) + '\n')
except EnvironmentError as e: except EnvironmentError as e:
@ -98,14 +98,43 @@ class FileList(collections.MutableSequence):
class FileListProperty(FileList): class FileListProperty(FileList):
def __init__(self, path):
"""
:param path: string or callable
Usage:
class Foo(object):
parameters = DirectoryDictProperty(lambda obj: os.path.join(obj.absolute_path, 'parameter'))
other_dict = DirectoryDictProperty('/tmp/folder')
def __init__(self):
self.absolute_path = '/tmp/foo'
"""
self.path = None
self.__path = path
def _set_path(self, *args, **kwargs):
if self.path is None:
path = self.__path
if callable(path):
path = path(*args, **kwargs)
if not os.path.isabs(path):
raise AbsolutePathRequiredError(path)
self.path = path
# Descriptor Protocol # Descriptor Protocol
def __get__(self, obj, objtype=None): def __get__(self, obj, objtype=None):
if obj is None: if obj is None:
return self.__class__ return self.__class__
self._set_path(obj)
return self return self
def __set__(self, obj, value): def __set__(self, obj, value):
os.unlink(self._path) self._set_path(obj)
os.unlink(self.path)
for item in value: for item in value:
self.append(item) self.append(item)
@ -117,13 +146,13 @@ class DirectoryDict(collections.MutableMapping):
"""A dict that stores it's state in a directory. """A dict that stores it's state in a directory.
""" """
def __init__(self, path, dict=None, **kwargs): def __init__(self, path, initial=None, **kwargs):
if not os.path.isabs(path): if not os.path.isabs(path):
raise AbsolutePathRequiredError(path) raise AbsolutePathRequiredError(path)
self._path = path self.path = path
if dict is not None: if initial is not None:
self.update(dict) self.update(initial)
if len(kwargs): if kwargs:
self.update(kwargs) self.update(kwargs)
def __repr__(self): def __repr__(self):
@ -131,36 +160,65 @@ class DirectoryDict(collections.MutableMapping):
def __getitem__(self, key): def __getitem__(self, key):
try: try:
with open(os.path.join(self._path, key), "r") as fd: with open(os.path.join(self.path, key), "r") as fd:
return fd.read().rstrip('\n') return fd.read().rstrip('\n')
except EnvironmentError: except EnvironmentError:
raise KeyError(key) raise KeyError(key)
def __setitem__(self, key, value): def __setitem__(self, key, value):
with open(os.path.join(self._path, key), "w") as fd: with open(os.path.join(self.path, key), "w") as fd:
fd.write(str(value)) fd.write(str(value))
def __delitem__(self, key): def __delitem__(self, key):
os.remove(os.path.join(self._path, key)) os.remove(os.path.join(self.path, key))
def __iter__(self): def __iter__(self):
return iter(os.listdir(self._path)) return iter(os.listdir(self.path))
def __len__(self): def __len__(self):
return len(os.listdir(self._path)) return len(os.listdir(self.path))
class DirectoryDictProperty(DirectoryDict): class DirectoryDictProperty(DirectoryDict):
def __init__(self, path):
"""
:param path: string or callable
Usage:
class Foo(object):
parameters = DirectoryDictProperty(lambda obj: os.path.join(obj.absolute_path, 'parameter'))
other_dict = DirectoryDictProperty('/tmp/folder')
def __init__(self):
self.absolute_path = '/tmp/foo'
"""
self.path = None
self.__path = path
def _set_path(self, *args, **kwargs):
if self.path is None:
path = self.__path
if callable(path):
path = path(*args, **kwargs)
if not os.path.isabs(path):
raise AbsolutePathRequiredError(path)
self.path = path
# Descriptor Protocol # Descriptor Protocol
def __get__(self, obj, objtype=None): def __get__(self, obj, objtype=None):
if obj is None: if obj is None:
return self.__class__ return self.__class__
self._set_path(obj)
return self return self
def __set__(self, obj, value): def __set__(self, obj, value):
for name in self.keys(): self._set_path(obj)
del self[name]
if value is not None: if value is not None:
for name in self.keys():
del self[name]
self.update(value) self.update(value)
def __delete__(self, obj): def __delete__(self, obj):