Hi,
Sebastian asked me for a solution to the following problem: reading a JSON map
where the values should be instances of a specific domain object. This was
already possible for lists.
Using the newly added NeoJSONCustomMapping>>#mapWithValueSchema: this is now
possible, as the following unit test shows:
testDictionaryOfObject2
| data json reader |
data := Dictionary new.
data
at: #one put: NeoJSONTestObject2 example1;
at: #two put: NeoJSONTestObject2 example1.
json := NeoJSONWriter toString: data.
reader := NeoJSONReader on: json readStream.
reader for: #DictionaryOfObject2 customDo: [ :mapping |
mapping mapWithValueSchema: NeoJSONTestObject2 ].
self
assert: (reader nextAs: #DictionaryOfObject2)
equals: data
Note that the mapping mechanism in NeoJSON is optional. Without mapping you get
Arrays and Dictionaries back, that you can then convert to your domain objects
in the a next step. With mapping however, these intermediary representations
are not used and maps or lists are parsed while creating and populating your
domain objects directly, which should be more efficient. This does of course
introduce the necessity of adding some form of static typing.
http://www.smalltalkhub.com/#!/~SvenVanCaekenberghe/Neo
Sven
