/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.hyracks.hdfs.lib;

import java.io.DataOutput;

import org.apache.hyracks.api.context.IHyracksTaskContext;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference;
import org.apache.hyracks.hdfs.api.ITupleWriter;
import org.apache.hyracks.hdfs.api.ITupleWriterFactory;

public class TextTupleWriterFactory implements ITupleWriterFactory {
    private static final long serialVersionUID = 1L;

    @Override
    public ITupleWriter getTupleWriter(IHyracksTaskContext ctx, int partition, int nPartition) {
        return new ITupleWriter() {
            private byte newLine = "\n".getBytes()[0];

            @Override
            public void open(DataOutput output) {

            }

            @Override
            public void write(DataOutput output, ITupleReference tuple) throws HyracksDataException {
                byte[] data = tuple.getFieldData(0);
                int start = tuple.getFieldStart(0);
                int len = tuple.getFieldLength(0);
                try {
                    output.write(data, start, len);
                    output.writeByte(newLine);
                } catch (Exception e) {
                    throw HyracksDataException.create(e);
                }
            }

            @Override
            public void close(DataOutput output) {

            }

        };
    }

}
