/*
 *  ******************************************************************************
 *  *
 *  *
 *  * 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.functions;


import lombok.extern.slf4j.Slf4j;
import org.datavec.api.records.reader.SequenceRecordReader;
import org.datavec.api.writable.Writable;
import org.nd4j.common.function.Function;
import org.nd4j.common.primitives.Pair;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.List;

@Slf4j
public class SequenceRecordReaderFunction
                implements Function<Pair<String, InputStream>, List<List<Writable>>> {
    protected SequenceRecordReader sequenceRecordReader;

    public SequenceRecordReaderFunction(SequenceRecordReader sequenceRecordReader) {
        this.sequenceRecordReader = sequenceRecordReader;
    }

    @Override
    public List<List<Writable>> apply(Pair<String, InputStream> value) {
        URI uri = URI.create(value.getFirst());
        try (DataInputStream dis = (DataInputStream) value.getRight()) {
            return sequenceRecordReader.sequenceRecord(uri, dis);
        } catch (IOException e) {
            log.error("",e);
        }

        throw new IllegalStateException("Something went wrong");
    }
}
