org.simpleflatmapper.datastax.impl.getter.DatastaxTupleGetter Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of sfm-datastax Show documentation

Cassandra Datastax SFM supports.

There is a newer version: 8.2.3

package org.simpleflatmapper.datastax.impl.getter;

import com.datastax.driver.core.DataType;
import com.datastax.driver.core.GettableByIndexData;
import com.datastax.driver.core.TupleType;
import org.simpleflatmapper.datastax.DatastaxColumnKey;
import org.simpleflatmapper.datastax.DatastaxMapperFactory;
import org.simpleflatmapper.map.ContextualSourceMapper;
import org.simpleflatmapper.map.SourceMapper;
import org.simpleflatmapper.map.property.FieldMapperColumnDefinition;
import org.simpleflatmapper.map.mapper.ConstantSourceMapperBuilder;
import org.simpleflatmapper.reflect.Getter;
import org.simpleflatmapper.tuple.Tuple2;

import java.lang.reflect.Type;
import java.util.List;

public class DatastaxTupleGetter> implements Getter {
    private final ContextualSourceMapper mapper;
    private final int index;

    public DatastaxTupleGetter(ContextualSourceMapper mapper, int index) {
        this.mapper = mapper;
        this.index = index;
    }

    @Override
    public T get(GettableByIndexData target) throws Exception {
        return mapper.map(target.getTupleValue(index));
    }

    @SuppressWarnings("unchecked")
    public static > Getter newInstance(DatastaxMapperFactory factory, Type target,  TupleType tt, int index) {
        ContextualSourceMapper mapper = newTupleMapper(target, tt, factory);
        return new DatastaxTupleGetter
(mapper, index);
    }

    public static > ContextualSourceMapper newTupleMapper(Type target, TupleType tt, DatastaxMapperFactory factory) {
        ConstantSourceMapperBuilder builder =
                DatastaxUDTGetter.newFieldMapperBuilder(factory, target);

        List componentTypes = tt.getComponentTypes();
        for(int i = 0; i < componentTypes.size(); i++) {
            FieldMapperColumnDefinition identity = FieldMapperColumnDefinition.identity();
            builder.addMapping(new DatastaxColumnKey("elt" + i, i, componentTypes.get(i)),
                    identity);
        }

        return builder.mapper();
    }
}