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from __future__ import print_function

try:

from collections import MutableMapping

except ImportError:

from UserDict import DictMixin as MutableMapping

class ObjectDB(object):

def __init__(self, db, validation):

self.db = db

self.validation = validation

self.observers = []

self.files = db.files

def validate_files(self):

for file in list(self.files):

if not self.validation.is_file_valid(file):

del self.files[file]

self._file_removed(file)

def validate_file(self, file):

if file not in self.files:

return

for key in list(self.files[file]):

if not self.validation.is_scope_valid(file, key):

del self.files[file][key]

def file_moved(self, file, newfile):

if file not in self.files:

return

self.files.rename(file, newfile)

self._file_removed(file)

self._file_added(newfile)

def get_files(self):

return self.files.keys()

def get_returned(self, path, key, args):

scope_info = self._get_scope_info(path, key, readonly=True)

result = scope_info.get_returned(args)

if self.validation.is_value_valid(result):

return result

def get_pername(self, path, key, name):

scope_info = self._get_scope_info(path, key, readonly=True)

result = scope_info.get_per_name(name)

if self.validation.is_value_valid(result):

return result

def get_callinfos(self, path, key):

scope_info = self._get_scope_info(path, key, readonly=True)

return scope_info.get_call_infos()

def add_callinfo(self, path, key, args, returned):

scope_info = self._get_scope_info(path, key, readonly=False)

old_returned = scope_info.get_returned(args)

if self.validation.is_more_valid(returned, old_returned):

scope_info.add_call(args, returned)

def add_pername(self, path, key, name, value):

scope_info = self._get_scope_info(path, key, readonly=False)

old_value = scope_info.get_per_name(name)

if self.validation.is_more_valid(value, old_value):

scope_info.save_per_name(name, value)

def add_file_list_observer(self, observer):

self.observers.append(observer)

def write(self):

self.db.write()

def _get_scope_info(self, path, key, readonly=True):

if path not in self.files:

if readonly:

return _NullScopeInfo()

self.files.create(path)

self._file_added(path)

if key not in self.files[path]:

if readonly:

return _NullScopeInfo()

self.files[path].create_scope(key)

result = self.files[path][key]

if isinstance(result, dict):

print(self.files, self.files[path], self.files[path][key])

return result

def _file_removed(self, path):

for observer in self.observers:

observer.removed(path)

def _file_added(self, path):

for observer in self.observers:

observer.added(path)

def __str__(self):

scope_count = 0

for file_dict in self.files.values():

scope_count += len(file_dict)

return 'ObjectDB holds %s file and %s scope infos' % \

(len(self.files), scope_count)

class _NullScopeInfo(object):

def __init__(self, error_on_write=True):

self.error_on_write = error_on_write

def get_per_name(self, name):

pass

def save_per_name(self, name, value):

if self.error_on_write:

raise NotImplementedError()

def get_returned(self, parameters):

pass

def get_call_infos(self):

return []

def add_call(self, parameters, returned):

if self.error_on_write:

raise NotImplementedError()

class FileInfo(MutableMapping):

def create_scope(self, key):

pass

class FileDict(MutableMapping):

def create(self, key):

pass

def rename(self, key, new_key):

pass

class ScopeInfo(object):

def get_per_name(self, name):

pass

def save_per_name(self, name, value):

pass

def get_returned(self, parameters):

pass

def get_call_infos(self):

pass

def add_call(self, parameters, returned):

pass

class CallInfo(object):

def __init__(self, args, returned):

self.args = args

self.returned = returned

def get_parameters(self):

return self.args

def get_returned(self):

return self.returned

class FileListObserver(object):

def added(self, path):

pass

def removed(self, path):

pass