Cassandra mapper not handling CQLType Tuple

Question

I am using datastax cassandra 3.1.0. I have created the following table in cassandra and inserted a record.

CREATE TABLE collect_things (   k int PRIMARY KEY,   v frozen <tuple <int, text, double>> );
INSERT INTO collect_things (k, v) VALUES(0, (3, 'bar', 2.1));
select * from collect_things ;
k | v
---+-----------------
 0 | (3, 'bar', 2.1)

When I am trying to fetch the above row in Java using Cassandra Mapper with the below code:

this.cluster = Cluster.builder().addContactPoint(node).withPort(port).build();
session = cluster.connect();
MappingManager manager = new MappingManager(session);
Mapper<CollectThings> mapper = manager.mapper(CollectThings.class);
Integer  k = 0;
mapper.get(k);

I am getting the below exception:

Exception in thread "main" com.datastax.driver.core.exceptions.CodecNotFoundException: Codec not found for requested operation: [frozen<tuple<int, varchar, double>> <-> com.datastax.driver.core.TupleType]
    at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:56)
    at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:25)
    at com.datastax.driver.mapping.DriverThrowables.propagateCause(DriverThrowables.java:41)
    at com.datastax.driver.mapping.Mapper.get(Mapper.java:432)

I have the following java bean for the above table. CollectThings.java

import com.datastax.driver.core.TupleType;
import com.datastax.driver.mapping.annotations.Frozen;
import com.datastax.driver.mapping.annotations.PartitionKey;
import com.datastax.driver.mapping.annotations.Table;

@Table(keyspace = "user_info", name = "collect_things")
public class CollectThings {

    private Integer k;
    private TupleType v;

    public CollectThings() {

    }

    @PartitionKey
    public Integer getK() {
        return k;
    }

    public void setK(Integer k) {
        this.k = k;
    }

    @Frozen
    public TupleType getV() {
        return v;
    }

    public void setV(TupleType v) {
        this.v = v;
    }
}

Could somebody please tell how to handle tuple types here? Does mapper out of the box not support cql tuple types?

Answer 1

You should be using TupleValue instead of TupleType. TupleType represents the type information for a particular tuple, where TupleValue represents an actual value. Using your example, I was able to retrieve data by changing all references of TupleType to TupleValue.