Java-Programming-Solving-Problems-with-Software/src/main/java/week3/WeatherCSVProblem.java at master · anein/Java-Programming-Solving-Problems-with-Software · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
package week3;

import edu.duke.DirectoryResource;
import edu.duke.FileResource;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;

import java.io.File;

/**
 * Created by white on 11/18/15.
 */


public class WeatherCSVProblem {

    final static String filename = "../../resources/main/nc_weather/2014/weather-2014-01-08.csv";

    public static void main(String[] args) {

        FileResource fr = new FileResource(filename);

        CSVParser parser = fr.getCSVParser();

        // test 1
//        coldestHourInFile(parser);
        // test 2


    }

    /**
     * Returns the CSVRecord with the coldest temperature in the file and
     * thus all the information about the coldest temperature
     *
     * @param parser
     */
    public static CSVRecord coldestHourInFile(CSVParser parser) {

        CSVRecord resultRecord = null;

        for (CSVRecord record : parser) {

            if (resultRecord == null) {
                resultRecord = record;
            } else {
                double temperatureF = Double.parseDouble(record.get("TemperatureF"));
                double coldestTemp = Double.parseDouble(resultRecord.get("TemperatureF"));
                resultRecord = (temperatureF < coldestTemp) ? record : resultRecord;
            }

        }

        return resultRecord;

    }

    /**
     * should return a string that is the name of the file
     * from selected files that has the coldest temperature
     */
    public static String fileWithColdestTemperature() {

        CSVRecord coldestRecord = null;
        DirectoryResource dr = new DirectoryResource();
        String filename = "";

        for (File f : dr.selectedFiles()) {

            FileResource fr = new FileResource(f);

            CSVRecord record = coldestHourInFile(fr.getCSVParser());

            double recordTemp = Double.parseDouble(record.get("TemperatureF"));

            if (recordTemp == -9999) {
                continue;
            }

            if (coldestRecord == null) {
                coldestRecord = record;
                filename = f.getAbsolutePath();
            } else {
                double coldestTemp = Double.parseDouble(coldestRecord.get("TemperatureF"));

                if (recordTemp < coldestTemp) {
                    coldestRecord = record;
                    filename = f.getAbsolutePath();
                }
            }

        }

        return filename;
    }

    /**
     * This method returns the CSVRecord that has the lowest humidity
     *
     * @param parser
     */
    public static CSVRecord lowestHumidityInFile(CSVParser parser) {

        CSVRecord resultRecord = null;

        for (CSVRecord record : parser) {

            if (record.get("Humidity").equals("N/A")) {
                continue;
            }

            if (resultRecord == null) {
                resultRecord = record;
            } else {

                double temperatureF = Double.parseDouble(record.get("Humidity"));
                double coldestTemp = Double.parseDouble(resultRecord.get("Humidity"));
                resultRecord = (temperatureF < coldestTemp) ? record : resultRecord;

            }

        }

        return resultRecord;
    }

    /**
     * @param parser
     * @return
     */
    public static double averageTemperatureInFile(CSVParser parser) {

        double averageTemp = 0.0;
        double sum = 0;
        int counter = 0;
        for (CSVRecord record : parser) {


            double recordTemp = Double.parseDouble(record.get("TemperatureF"));

            if (recordTemp == -9999) {
                continue;
            } else {
                sum += Double.parseDouble(record.get("TemperatureF"));
                counter++;
            }


        }

        averageTemp = sum / counter;

        return averageTemp;
    }

    /**
     * This method returns a double that represents the average temperature of only
     * those temperatures when the humidity was greater than or equal to value
     *
     * @param parser
     * @param level
     */
    public static double averageTemperatureWithHighHumidityInFile(CSVParser parser, double level) {

        double averageTemp;
        double sum = 0;
        int counter = 0;

        for (CSVRecord record : parser) {

            double humidity = Double.parseDouble(record.get("Humidity"));

            if (humidity >= level) {
                sum += Double.parseDouble(record.get("TemperatureF"));
                counter++;
            }

        }

        averageTemp = sum / counter;

        return averageTemp;

    }

}