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/**
* 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.locations;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import java.util.Vector;
import org.apache.commons.lang3.tuple.Pair;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
public class LocationReader
{
private static class ZipcodeLocationRecord
{
public final Pair<Double, Double> coordinates;
public final String state;
public final String city;
public ZipcodeLocationRecord(Pair<Double, Double> coordinates,
String city, String state)
{
this.coordinates = coordinates;
this.city = city;
this.state = state;
}
}
private InputStream getResource(File filename)
{
InputStream stream = getClass().getResourceAsStream("/input_data/" + filename);
return new BufferedInputStream(stream);
}
private ImmutableMap<String, Double> readIncomeData(InputStream path) throws FileNotFoundException
{
Scanner scanner = new Scanner(path);
// skip headers
scanner.nextLine();
scanner.nextLine();
Map<String, Double> entries = Maps.newHashMap();
while(scanner.hasNextLine())
{
String line = scanner.nextLine().trim();
String[] cols = line.split(",");
// zipcodes are in the form "ZCTA5 XXXXX"
String zipcode = cols[2].split(" ")[1].trim();
try
{
double medianHouseholdIncome = Integer.parseInt(cols[5].trim());
entries.put(zipcode, medianHouseholdIncome);
}
catch(NumberFormatException e)
{
}
}
scanner.close();
return ImmutableMap.copyOf(entries);
}
private ImmutableMap<String, Long> readPopulationData(InputStream path) throws FileNotFoundException
{
Scanner scanner = new Scanner(path);
// skip header
scanner.nextLine();
Map<String, Long> entries = Maps.newHashMap();
while(scanner.hasNextLine())
{
String line = scanner.nextLine().trim();
if(line.length() == 0)
continue;
String[] cols = line.split(",");
String zipcode = cols[0].trim();
Long population = Long.parseLong(cols[1].trim());
if(entries.containsKey(zipcode))
{
entries.put(zipcode, Math.max(entries.get(zipcode), population));
}
else
{
entries.put(zipcode, population);
}
}
scanner.close();
return ImmutableMap.copyOf(entries);
}
private ImmutableMap<String, ZipcodeLocationRecord> readCoordinates(InputStream path) throws FileNotFoundException
{
Scanner scanner = new Scanner(path);
// skip header
scanner.nextLine();
Map<String, ZipcodeLocationRecord> entries = Maps.newHashMap();
while(scanner.hasNextLine())
{
String line = scanner.nextLine().trim();
String[] cols = line.split(", ");
// remove quote marks
String zipcode = cols[0].substring(1, cols[0].length() - 1);
String state = cols[1].substring(1, cols[1].length() - 1);
Double latitude = Double.parseDouble(cols[2].substring(1, cols[2].length() - 1));
Double longitude = Double.parseDouble(cols[3].substring(1, cols[3].length() - 1));
String city = cols[4].substring(1, cols[4].length() - 1);
Pair<Double, Double> coords = Pair.of(latitude, longitude);
ZipcodeLocationRecord record = new ZipcodeLocationRecord(coords, city, state);
entries.put(zipcode, record);
}
scanner.close();
return ImmutableMap.copyOf(entries);
}
public ImmutableList<Location> readData() throws FileNotFoundException
{
ImmutableMap<String, Double> incomes = readIncomeData(getResource(LocationConstants.INCOMES_FILE));
ImmutableMap<String, Long> populations = readPopulationData(getResource(LocationConstants.POPULATION_FILE));
ImmutableMap<String, ZipcodeLocationRecord> coordinates = readCoordinates(getResource(LocationConstants.COORDINATES_FILE));
Set<String> zipcodeSubset = new HashSet<String>(incomes.keySet());
zipcodeSubset.retainAll(populations.keySet());
zipcodeSubset.retainAll(coordinates.keySet());
List<Location> table = new Vector<Location>();
for(String zipcode : zipcodeSubset)
{
Location record = new Location(zipcode,
coordinates.get(zipcode).coordinates,
coordinates.get(zipcode).city,
coordinates.get(zipcode).state,
incomes.get(zipcode),
populations.get(zipcode));
table.add(record);
}
return ImmutableList.copyOf(table);
}
}
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