romanov73/time-series-smoothing
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#5 -- parse date value csv file

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This commit is contained in:
Anton Romanov 2021-06-25 16:46:02 +04:00
parent 88249612ec
commit 5b325a122a
3 changed files with 32 additions and 4 deletions
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10
src/main/java/ru/ulstu/db/DbFileService.java
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@ -15,8 +15,10 @@ import ru.ulstu.db.model.TimeSeriesSet;
import ru.ulstu.service.UtilService;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.ArrayList;
@ -56,7 +58,7 @@ public class DbFileService implements DbService {
String row;
TimeSeries result = new TimeSeries(timeSeriesKey);
while ((row = csvReader.readLine()) != null) {
TimeSeries partOfTimeSeries = new UtilService().getTimeSeriesFromString(row);
TimeSeries partOfTimeSeries = new UtilService().getTimeSeriesFromDateValueString(row);
if (partOfTimeSeries.getLength() > 0) {
result.getValues().addAll(partOfTimeSeries.getValues());
}
@ -76,9 +78,11 @@ public class DbFileService implements DbService {
}
@Override
public boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) {
public boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException {
validateTimeSeriesSet(timeSeriesSet);
BufferedWriter writer = new BufferedWriter(new FileWriter(Paths.get(timeSeriesDbPath, timeSeriesSet.getKey()).toFile()));
writer.write(new UtilService().getTimeSeriesToDateValueString(timeSeries));
writer.close();
return true;
}

2
src/main/java/ru/ulstu/db/DbService.java
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@ -22,5 +22,5 @@ public interface DbService {
boolean addNewSet(String key);
boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries);
boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException;
}

24
src/main/java/ru/ulstu/service/UtilService.java
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@ -59,4 +59,28 @@ public class UtilService {
.map(v -> v.getValue().toString().replace("\\.", ","))
.collect(Collectors.joining(";"));
}
public String getTimeSeriesToDateValueString(TimeSeries timeSeries) {
return timeSeries
.getValues()
.stream()
.map(v -> v.getDate().toString() + ";" + v.getValue().toString().replace("\\.", ","))
.collect(Collectors.joining("\n"));
}
public TimeSeries getTimeSeriesFromDateValueString(String tsString) {
List<TimeSeriesValue> tsValues = Arrays.stream(tsString.split("\n"))
.filter(v -> {
try {
Double.parseDouble(v);
return true;
} catch (NumberFormatException e) {
return false;
}
})
.map(Double::parseDouble)
.map(TimeSeriesValue::new)
.collect(Collectors.toList());
return TimeSeriesUtils.fillDates(new TimeSeries(tsValues));
}
}