/*
 *  ******************************************************************************
 *  *
 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * 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.
 *  *
 *  * SPDX-License-Identifier: Apache-2.0
 *  *****************************************************************************
 */

package org.datavec.local.transforms.rank;

import org.datavec.api.writable.LongWritable;
import org.datavec.api.writable.Writable;
import org.nd4j.common.function.Function;
import org.nd4j.common.primitives.Pair;

import java.util.ArrayList;
import java.util.List;

public class UnzipForCalculateSortedRankFunction
                implements Function<Pair<Pair<Writable, List<Writable>>, Long>, List<Writable>> {
    @Override
    public List<Writable> apply(Pair<Pair<Writable, List<Writable>>, Long> v1) {
        List<Writable> inputWritables = new ArrayList<>(v1.getFirst().getSecond());
        inputWritables.add(new LongWritable(v1.getSecond()));
        return inputWritables;
    }
}
