Codec not found for frozen<map<frozen<map<text, text>>,int>>

[Jakub Liska]

Hey,

I can create table with : 

data frozen<map<frozen<map<text, text>>,int>>

but when I'm trying to read it (Scala) : 

row.getMap("data", classOf[java.util.Map[String,String]], classOf[Integer])

Codec not found for requested operation: [map<varchar, varchar> <-> java.util.Map]

So I'm thinking, is frozen<map<frozen<map<text, text>>,int>> supported ?

[Andrew Tolbert]

Hi Jakub,

I think this might because because generic type information is not discernible (in java) when using classOf because of type erasure.

Instead, you could try using the TypeToken variant of getMap, i.e.:

import static com.datastax.driver.core.TypeTokens;

import com.google.common.reflect.TypeToken

row.getMap("data", TypeTokens.mapOf(classOf[String], classOf[String]), TypeToken.of(classOf[Integer]))

Thanks,

Andy

[Andrew Tolbert]

A bit of a copy paste fail on my part:

import static com.datastax.driver.core.TypeTokens;

should be:

import com.datastax.driver.core.TypeTokens

[Jakub Liska]

Big thanks Andrew, I didn't find it in TypeToken and I completely missed the TypeTokens class.