content: /**
   * 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.bigtop.datagenerators.weatherman.internal;
  
  import java.io.BufferedInputStream;
  import java.io.File;
  import java.io.InputStream;
  import java.util.List;
  import java.util.Scanner;
  
  import org.apache.commons.lang3.tuple.Pair;
  
  import com.google.common.collect.Lists;
  
  public class WeatherParametersReader {
    private InputStream getResource(File filename) throws Exception {
      InputStream stream = getClass()
              .getResourceAsStream("/input_data/" + filename);
      return new BufferedInputStream(stream);
    }
  
    private WeatherStationParameters parseLine(String line) {
      line = line.trim();
      String[] cols = line.split(",");
  
      String WBAN = cols[0];
      String city = cols[1];
      String state = cols[2];
      double latitude = Double.parseDouble(cols[3]);
      double longitude = Double.parseDouble(cols[4]);
      Pair<Double, Double> coordinates = Pair.of(latitude, longitude);
      double temperatureAverage = Double.parseDouble(cols[5]);
      double temperatureRealCoeff = Double.parseDouble(cols[6]);
      double temperatureImagCoeff = Double.parseDouble(cols[7]);
      double temperatureDerivStd = Double.parseDouble(cols[8]);
      double precipitationAverage = Double.parseDouble(cols[9]);
      double windSpeedRealCoeff = Double.parseDouble(cols[10]);
      double windSpeedImagCoeff = Double.parseDouble(cols[11]);
      double windSpeedK = Double.parseDouble(cols[12]);
      double windSpeedTheta = Double.parseDouble(cols[13]);
  
      return new WeatherStationParameters(WBAN, city, state, coordinates,
              temperatureAverage, temperatureRealCoeff, temperatureImagCoeff,
              temperatureDerivStd, precipitationAverage, windSpeedRealCoeff,
              windSpeedImagCoeff, windSpeedK, windSpeedTheta);
    }
  
    public List<WeatherStationParameters> readParameters() throws Exception {
      InputStream inputStream = getResource(
              WeatherConstants.WEATHER_PARAMETERS_FILE);
      Scanner scanner = new Scanner(inputStream);
  
      // skip header
      scanner.nextLine();
  
      List<WeatherStationParameters> parameterList = Lists.newArrayList();
      while (scanner.hasNextLine()) {
        String line = scanner.nextLine();
        WeatherStationParameters parameters = parseLine(line);
        parameterList.add(parameters);
      }
  
      scanner.close();
  
      return parameterList;
    }
  }
  