/**
 * 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.hcatalog.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.hcatalog.data.DefaultHCatRecord;
import org.apache.hcatalog.data.HCatRecord;
import org.apache.hcatalog.data.transfer.DataTransferFactory;
import org.apache.hcatalog.data.transfer.HCatWriter;
import org.apache.hcatalog.data.transfer.WriterContext;

public class DataWriterSlave {

    public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {

        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(args[0]));
        WriterContext cntxt = (WriterContext) ois.readObject();
        ois.close();

        HCatWriter writer = DataTransferFactory.getHCatWriter(cntxt);
        writer.write(new HCatRecordItr(args[1]));

    }

    private static class HCatRecordItr implements Iterator<HCatRecord> {

        BufferedReader reader;
        String curLine;

        public HCatRecordItr(String fileName) throws FileNotFoundException {
            reader = new BufferedReader(new FileReader(new File(fileName)));
        }

        @Override
        public boolean hasNext() {
            try {
                curLine = reader.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null == curLine ? false : true;
        }

        @Override
        public HCatRecord next() {

            String[] fields = curLine.split("\t");
            List<Object> data = new ArrayList<Object>(3);
            data.add(fields[0]);
            data.add(Integer.parseInt(fields[1]));
            data.add(Double.parseDouble(fields[2]));
            return new DefaultHCatRecord(data);
        }

        @Override
        public void remove() {
            // TODO Auto-generated method stub

        }
    }
}