json4s Questions
3
I have some scala code that needs to be able to serialize/deserialize some Java classes using Json4s.
I am using "org.json4s" %% "json4s-ext" % "4.0.5" and "org.j...
3
I am receiving the following error while attempting to parse JSON with json4s:
Non-standard token 'NaN': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow
How do I enable this feature...
3
I`m using json4s-jackson(version 3.2.11).
I'm trying to ignore field using annotations(like jackson java version).
Here's exmaple:
case class User(id: Long, name: String, accessToken: String)
...
1
I have a case class with many members, two of which are non-primitive:
import com.twitter.util.Duration
case class Foo(
a: Int,
b: Int,
...,
y: Int,
z: Int,
timeoutSeconds: Duration,
runtim...
Bridgework asked 29/11, 2014 at 4:35
8
Solved
Is there a simple way to converting a given Row object to json?
Found this about converting a whole Dataframe to json output:
Spark Row to JSON
But I just want to convert a one Row to json.
Here...
Allusion asked 11/1, 2017 at 22:28
2
How to easily rename field-names in json4s? From their documentation, i've tried the following snippet but it doesn't seem to rename the serial field to id.
case class Person(serial: Int, firstNa...
1
Set up
I'm using json4s 3.2.11 and Scala 2.11.
I have an enumeration defined using sealed trait, and a custom serializer for it:
import org.json4s.CustomSerializer
import org.json4s.JsonAST.JStr...
Putnem asked 17/4, 2019 at 3:55
2
I am using Json4s classes inside of a Spark 2.2.0 closure. The "workaround" for a failure to serialize DefaultFormats is to include their definition inside every closure executed by Spark that need...
Ethnology asked 26/1, 2018 at 1:31
3
Solved
Basically, i have to analyze some complex JSON's on HDFS with Spark.
I use "for comprehensions" to (pre)filter the JSON's and "extract" method
of json4s to wrap it into a case class
This one wor...
Rosenthal asked 16/7, 2014 at 16:49
0
Below is my sample JSON and can be nested to any level deep:
{
"key1": {
"keyA": 'valueI'
},
"key2": {
"keyB": 'valueII'
},
"key3": [
{
"a":1,
"b":2
},
{
"a":1,
"b":2
}
]
}
This ...
Knap asked 3/8, 2018 at 8:27
2
I've a strange problem with spark 2.1.1 and json4s.jackson.
I upgraded my streaming project from spark 1.5.1. Now when I execute code in IDE everything works fine.
But after assembly and code sta...
Vermination asked 24/7, 2017 at 7:11
2
Solved
The following test snippet
implicit val formats = DefaultFormats + FullTypeHints(Contacts.classList)
val serialized = Serialization.write(List(Mail(field = "[email protected]", note = "Rando...
Redintegration asked 19/10, 2017 at 15:55
2
Solved
This snippet of code works very well, but it generates compact JSON (no line breaks / not very human readable).
import org.json4s.native.Serialization.write
implicit val jsonFormats = DefaultForma...
1
I have a really simple example:
import org.json4s._
import org.json4s.native.JsonMethods._
import org.json4s.JsonDSL._
val json = ("english" -> JString("serialization")) ~ ("japanese" -> JS...
Sewing asked 3/2, 2016 at 4:20
1
I want to convert a jvalue to json string. Here is what my code look like:
import org.json4s._
import org.json4s.JsonDSL._
import org.json4s.native.JsonMethods._
import org.json4s.DefaultFormats._...
2
I'm trying to prevent one of the properties of a Scala case class being serialised. I've tried annotating the property in question with the usual @JsonIgnore and I've also tried attaching the @Json...
2
Solved
I am currently extracting some metrics from different data sources and storing them in a map of type Map[String,Any] where the key corresponds to the metric name and the value corresponds to the me...
2
I have a nested json whose structure is not defined. It can be different each time I run since I am reading from a remote file. I need to convert this json into a map of type Map[String, Any]. I tr...
2
Solved
I've run into an issue with attempting to parse json in my spark job. I'm using spark 1.1.0, json4s, and the Cassandra Spark Connector. The exception thrown is:
java.io.NotSerializableException: ...
Hame asked 15/4, 2015 at 22:36
2
Solved
I'm having a problem very similar to what's described here: Combining type and field serializers
case class(id: Option[UUID], otherValue:String, … )
The answer to the related question would allo...
Mondragon asked 1/6, 2014 at 7:48
2
Solved
I have a sample array:
[{
"abc":"1",
"de":"1"
},
{
"fgh":"2",
"ij":"4"
}]
which is a org.json4s.JsonAST.JValue.
How is it possible to iterate over each object inside the array, to operate o...
2
In the example given on the json4s readme https://github.com/json4s/json4s#serializing-non-supported-types the match only works if the fields are order {"start":0,"end":0}. If the start and end fie...
1
Solved
I have a common problem but still couldn't wrap my head around what I was reading around.
In a scalatra app, I am receiving the following json:
{
_type: "hello",
timestamp: 123,
data: [
{table: "...
Eared asked 29/10, 2015 at 11:35
2
Solved
I have some case classes defined like follows:
sealed trait Breed
case object Beagle extends Breed
case object Mastiff extends Breed
case object Yorkie extends Breed
case class Dog(name: String, ...
3
Spark has a dependency on json4s 3.2.10, but this version has several bugs and I need to use 3.2.11. I added json4s-native 3.2.11 dependency to build.sbt and everything compiled fine. But when I sp...
Crimpy asked 23/3, 2015 at 17:35
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