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/*
 *
 *  * Copyright 2016 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 */

package org.deeplearning4j.spark.impl.computationgraph.dataset;

import org.apache.spark.api.java.function.PairFunction;
import org.deeplearning4j.nn.graph.util.ComputationGraphUtil;
import org.nd4j.linalg.dataset.DataSet;
import org.nd4j.linalg.dataset.api.MultiDataSet;
import scala.Tuple2;

/**Simple conversion function to convert from a {@code JavaPairRDD} to a {@code JavaPairRDD}
 * @author Alex Black
 */
public class PairDataSetToMultiDataSetFn implements PairFunction,K,MultiDataSet> {

    @Override
    public Tuple2 call(Tuple2 in) throws Exception {
        return new Tuple2<>(in._1(), ComputationGraphUtil.toMultiDataSet(in._2()));
    }
}