DataType.asJavaClass - Is there a replacement/alternative ?

[IP]

Is there way to get the Java Class of the Datatype on the java driver version > 2.1 ?

Looks like the method that does it( com.datastax.driver.core.DataType.asJavaClass() )  was removed from on v2.2 on.

Here is the piece of code that depends on that method.

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        ResultSet resultSet = session.execute(boundStatement);

        int totRows = resultSet.getAvailableWithoutFetching();

        if (totRows > 0) {

            tList = new ArrayList<T>(totRows);

            List<ColumnDefinitions.Definition> columnDefinitions = resultSet.getColumnDefinitions().asList();

            Iterator<Row> rowsIterator = resultSet.iterator();
            while (rowsIterator.hasNext()) {

                Row row = rowsIterator.next();
                T instance = (T) clazz.newInstance();

                for (ColumnDefinitions.Definition columnDefinition : columnDefinitions) {
                   
                    Object value = row.getObject(columnDefinition.getName());
                   
                    PropertyDescriptor propertyDescriptor = new PropertyDescriptor(columnDefinition.getName(),
                            columnDefinition.getType().asJavaClass());

                    Method method = propertyDescriptor.getWriteMethod();

                    method.invoke(instance, value);

                }

            }

        }

        return tList;

    }
-----   
   

Thanks
IPVP

[DuyHai Doan]

Since the introduction of the codec system, the .asJavaClass() method has been removed. Alternative way:

TypeToken<?> typeToken = session.getCluster().getConfiguration().getCodecRegistry().codecFor(myDataType).getJavaType()

From the TypeToken of Guava, you can call getRawType() to obtain a raw Class<?> or getImmediateRawTypes()

[Jeremy Truelove]

What about the getCustomTypeClassName function what is the replacement on DataType for that now?

[Alexandre Dutra]

Hi Jeremy,

Try this:

DataType dataType = ...;

if (dataType instanceof DataType.CustomType) {

    String customTypeClassName = ((DataType.CustomType) dataType).getCustomTypeClassName();

}

Hope that helps,

Alexandre

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Alexandre Dutra

Driver & Tools Engineer @ DataStax

[Jacques-Henri Berthemet]

You now have to use getJavaClass() from a CassandraSession instance;

 

Regards,

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Jacques-Henri Berthemet