ooc-yajl is an ooc binding to yet another json library by lloyd - thanks for the great library!
ooc-yajl is capable of JSON parsing and generation.
ooc-yajl is licensed under the MIT license (see LICENSE for details).
Usage of ooc-yajl is quite simple and abstracted. See simple-test.ooc for - well, yeah, a simple test.
First, let's import the package. To make it clearer where all the names come from, we're using a namespaced import here:
import yajl/Yajl into JSON
You can now use a simple shortcut for JSON parsing from a string:
str := "{\"key\":\"value\",\"list\":[1,\"2\",[3]]}"
map := JSON parse(str, ValueMap)
This line gets a ValueMap object (you pass the root object's type to parse).
You can be sure that the returning object is a ValueMap object,
since ooc-yajl performs a type check.
ooc-yajl uses ooc's standard types for all normal datatypes
(Int, Bool, String, ...), except for objects (maps) and arrays
There are the ValueMap and ValueList classes for this, which in
fact are simple subclasses of HashMap and ArrayList.
You should also know that ooc-yajl internally uses a container class
for all values called Value. ValueMap and ValueList internally
store Value instances which store the actual values. To retrieve the
actual value, not the container Value, make sure you use the getValue
and setValue methods or the special operators.
All get* methods perform type checks.
Note
Umm no, currently I have disabled the type checks. I have to think about that.
map getValue("key", String)
// is equivalent to
map["key", String]
map putValue("foo", "bar")
// is equivalent to
map["foo"] = "bar"
array getValue(1, String)
// is equivalent to
array[1, String]
Let's continue with our example now. You now got a nice ValueMap object. To get
its members, do this:
// gets the "key" value as String. myValue := map["key", String] // or get the "list" value as ValueList. myList := map["list", JSON ValueList] // this will fail with a ``JSON JSONException``, since you passed the wrong type: myInt := map["list", Int] // you can, of course, also handle lists: myFirstElement := myList[0, Int]
You see, parsing is easy, let's go to generation. Basically, you can just build your own
ooc-yajl object structure like the one you receive from parse and call generate
on it:
str := JSON generate(map)
Let's see how'd construct JSON manually:
info := JSON ValueMap new()
info["real_name"] = "John Doe"
info["age"] = 56
info["is_cool"] = true
secretNames := JSON ValueList new()
secretNames addValue("Herbert YouHaveNoIdeaWhoIAmCauseIGotACoupleOfSecretNames") .addValue("Dohn Joe") .addValue(009)
info["secret_names"] = secretNames
// and now, generate it!
string := JSON generate(info)
string println()
Yay.
If you have any questions, please join #ooc-lang on freenode and ask. You are loved.