1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # Implements `app::data_store` using `NSUserDefaults`
18 import app
::data_store
19 import cocoa
::foundation
24 # The `NSUserDefaults` used to implement `DataStore`
25 var user_defaults
= new NSUserDefaults.standard_user_defaults
is lazy
29 var nsstr
= user_defaults
.string_for_key
(key
.to_nsstring
)
31 if nsstr
.address_is_null
then return null
34 var deserializer
= new JsonDeserializer(nsstr
.to_s
)
35 var deserialized
= deserializer
.deserialize
37 var errors
= deserializer
.errors
38 if errors
.not_empty
then
39 # An update may have broken the versioning compatibility
40 print_error
"{class_name} error at deserialization: {errors.join(", ")}"
41 return null # Let's be safe
47 redef fun []=(key
, value
)
49 var nsobject
: NSString
52 nsobject
= new NSString.nil
54 var serialized_string
= new StringWriter
55 var serializer
= new JsonSerializer(serialized_string
)
56 serializer
.serialize
(value
)
59 nsobject
= serialized_string
.to_s
.to_nsstring
62 user_defaults
.set_object
(nsobject
, key
.to_nsstring
)