1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
# Copyright (C) 2007, One Laptop Per Child
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import gobject
from sugar.datastore import dbus_helpers
class DSObject(gobject.GObject):
__gsignals__ = {
'updated': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([]))
}
def __init__(self, object_id, metadata, file_path):
gobject.GObject.__init__(self)
self.object_id = object_id
self._metadata = metadata
self._file_path = file_path
def __getitem__(self, key):
return self.metadata[key]
def __setitem__(self, key, value):
if not self.metadata.has_key(key) or self.metadata[key] != value:
self.metadata[key] = value
self.emit('updated')
def get_metadata(self):
return self._metadata
def set_metadata(self, metadata):
if self._metadata != metadata:
self._metadata = metadata
self.emit('updated')
metadata = property(get_metadata, set_metadata)
def get_file_path(self):
return self._file_path
def set_file_path(self, file_path):
if self._file_path != file_path:
self._file_path = file_path
self.emit('updated')
file_path = property(get_file_path, set_file_path)
def get(object_id):
logging.debug('datastore.get')
metadata = dbus_helpers.get_properties(object_id)
file_path = dbus_helpers.get_filename(object_id)
ds_object = DSObject(object_id, metadata, file_path)
# TODO: register the object for updates
return ds_object
def create():
return DSObject(object_id=None, metadata={}, file_path=None)
def write(ds_object):
logging.debug('datastore.write')
if ds_object.object_id:
dbus_helpers.update(ds_object.object_id,
ds_object.metadata,
ds_object.file_path)
else:
ds_object.object_id = dbus_helpers.create(ds_object.metadata,
ds_object.file_path)
# TODO: register the object for updates
logging.debug('Written object %s to the datastore.' % ds_object.object_id)
def find(query):
object_ids = dbus_helpers.find({})
objects = []
for object_id in object_ids:
objects.append(get(object_id))
return objects
|
