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 org.apache.bigtop.datagenerators.samplers.samplers.ConditionalSampler;
  import org.apache.bigtop.datagenerators.samplers.samplers.Sampler;
  import org.apache.bigtop.datagenerators.weatherman.WeatherRecord;
  import org.joda.time.LocalDate;
  
  public class WeatherSampler implements Sampler<WeatherRecord> {
    private final ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> tempSampler;
    private final ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> windSpeedSampler;
    private final ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> precipitationSampler;
    private LocalDate date;
  
    public WeatherSampler(LocalDate startDate,
            ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> tempSampler,
            ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> windSpeedSampler,
            ConditionalSampler<WeatherRecordBuilder, WeatherRecordBuilder> precipitationSampler) {
      this.tempSampler = tempSampler;
      this.windSpeedSampler = windSpeedSampler;
      this.precipitationSampler = precipitationSampler;
      date = startDate;
    }
  
    public WeatherRecord sample() throws Exception {
      WeatherRecordBuilder weatherRecord = new WeatherRecordBuilder(date);
  
      weatherRecord = tempSampler.sample(weatherRecord);
      weatherRecord = windSpeedSampler.sample(weatherRecord);
      weatherRecord = precipitationSampler.sample(weatherRecord);
  
      date = date.plusDays(WeatherConstants.WEATHER_TIMESTEP);
  
      return weatherRecord.build();
    }
  }
  