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#kotson
  • g

    gregschlom

    12/15/2016, 7:42 PM
    Copy code
    /*
   I need to:
    - Have Gson deserialize this, even there's no 0-arg constructor
    - Have an exception thrown if "name" is null, missing, or not a string in the JSON data
    - Have favoriteColor be "blue" if it's null or missing 
 */
class Person(
        val name: String,
        val favoriteColor: String = "blue") {
}
  • g

    gregschlom

    12/15/2016, 7:42 PM
    Can kotson help? Or should I look for a different library?
  • g

    gregschlom

    12/15/2016, 7:43 PM
    I’m thinking that kotson’s property delegates might help
  • g

    gregschlom

    12/15/2016, 7:45 PM
    I’m happy to add annotationsor modify my code. The one thing I really care about is not getting 
    null
    if I say that a kotlin type is non-nullable. I should get a deserialization excpetion instead. Not an NPE when I try to access the field
  • j

    jkwatson

    12/15/2016, 8:01 PM
    Is the problem the default value on the constructor arg?
  • g

    gregschlom

    12/15/2016, 8:04 PM
    @jkwatson No, the problem (again, with Gson, not tried Kotson at all) is that Gson will make 
    name
    null if it’s missing or null in the json
  • j

    jkwatson

    12/15/2016, 8:05 PM
    oh, ok. yeah, gson doesn’t know anything about nullable/non-nullable.
  • j

    jkwatson

    12/15/2016, 8:05 PM
    One option is to use jackson with the kotlin extension. it works really well
  • g

    gregschlom

    12/15/2016, 8:06 PM
    Yeah, tht’s actually what I’m investigating right now. Thanks for confirming my intuition
  • j

    jkwatson

    12/15/2016, 8:06 PM
    gson doesn’t ever call constructors, so it would never hit the kotlin code that would disallow the null values
  • g

    gregschlom

    12/15/2016, 8:07 PM
    yeah. I really don’t like that design decision from gson. That’s unfortunate
  • j

    jkwatson

    12/15/2016, 8:07 PM
    ymmv. I like gson a lot better than jackson for java (I think the defaults work better for me), but for kotlin, it’s a lot dicier.
  • g

    gregschlom

    12/15/2016, 8:11 PM
    Yeah, Gson has always been my go-to json library for java as well, really bummed it doesn’t work well with kotlin
  • g

    gregschlom

    12/15/2016, 8:11 PM
    On the other hand, just tried jackson and it does exactly what I need
  • s

    salomonbrys

    01/17/2017, 1:36 PM
    Kotson 
    2.5.0
    is out 😉 As usual, everything in the changelog : https://github.com/SalomonBrys/Kotson/blob/master/CHANGELOG.md#250-17-01-2017
  • a

    altero

    01/19/2017, 1:45 PM
    @altero has left the channel
  • s

    sorinirimies

    01/20/2017, 11:38 PM
    Hi there. I was just wondering if there is a plan to make bindings for Moshi aswell?
  • s

    salomonbrys

    01/21/2017, 11:37 AM
    Hi @sorinirimies. Sorry to say no, there isn't 😉
  • i

    Ian

    01/28/2017, 10:18 PM
    Having a hard time getting this to work: 
    val event : String = gson.fromJson(returnEventStr)
  • i

    Ian

    01/28/2017, 10:18 PM
    I get “None of the following functions can be called with the arguments supplied”, it seems that it’s not finding the kotson extension function
  • i

    Ian

    01/28/2017, 10:19 PM
    I’ve included 
    import com.github.salomonbrys.kotson.*
    but it’s greyed out, Idea says it’s not being used
  • i

    Ian

    01/28/2017, 10:19 PM
    Anyone have any ideas?
  • i

    Ian

    01/29/2017, 3:26 PM
    @salomonbrys ^^^
  • s

    salomonbrys

    01/29/2017, 4:25 PM
    @Ian 
    fromJson
    takes a JSON String and a Class and returns an object. Not sure what you are trying to achive here
  • i

    Ian

    01/29/2017, 4:27 PM
    Shouldn’t Kotlin infer the generic type? I’ve had trouble regardless of whether I specify the generic type or allow it to be inferred
  • i

    Ian

    01/29/2017, 4:28 PM
    It doesn’t seem to be seeing Kotson’s extension to the Gson class
  • s

    salomonbrys

    01/29/2017, 4:35 PM
    Does 
    val event : String = gson.fromJson<String>(returnEventStr)
    works ?
  • i

    Ian

    01/29/2017, 4:37 PM
    Sorry, will take me a sec to get back into that code...
  • i

    Ian

    01/29/2017, 4:39 PM
    Ok, now it’s working - I must have been doing something stupid. Sorry for bothering you
  • s

    sreich

    02/12/2017, 8:56 PM
    trying to save jodatime thing with kotson...i'm not married to jodatime though, but i can't target java 8 api
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