102 lines
2.9 KiB
Java
102 lines
2.9 KiB
Java
package org.gcube.data_catalogue.grsf_publish_ws.utils;
|
|
|
|
import java.io.BufferedWriter;
|
|
import java.io.File;
|
|
import java.io.FileOutputStream;
|
|
import java.io.OutputStreamWriter;
|
|
import java.util.List;
|
|
|
|
import org.gcube.data_catalogue.grsf_publish_ws.json.input.TimeSeriesBean;
|
|
import org.slf4j.LoggerFactory;
|
|
|
|
|
|
/**
|
|
* Convert lists to csv format helpers
|
|
* @author Costantino Perciante at ISTI-CNR (costantino.perciante@isti.cnr.it)
|
|
*/
|
|
public class CSVHelpers {
|
|
|
|
private static final org.slf4j.Logger logger = LoggerFactory.getLogger(CSVHelpers.class);
|
|
private static final String CSV_SEPARATOR = ",";
|
|
private static final String UPLOAD_LOCATION_LOCAL = System.getProperty("java.io.tmpdir");
|
|
private static final String GRSF_SUB_PATH = "GRSF_TIME_SERIES";
|
|
|
|
/**
|
|
* Write a time series to a csv file, and returns the file reference.<br>
|
|
* Please give the timeSeries already sorted per year
|
|
* @param timeSeries
|
|
* @param <T>
|
|
* @param <T1>
|
|
*/
|
|
public static <T, T1> File listToCSV(List<TimeSeriesBean<T, T1>> timeSeries){
|
|
|
|
if(timeSeries == null || timeSeries.isEmpty()){
|
|
logger.warn("The time series provided is null or empty ... " + timeSeries );
|
|
return null;
|
|
}else
|
|
|
|
try{
|
|
String fileName = UPLOAD_LOCATION_LOCAL + File.separator + GRSF_SUB_PATH + File.separator + "time_series_" + System.currentTimeMillis() + ".csv";
|
|
File file = new File(fileName);
|
|
file.getParentFile().mkdirs();
|
|
file.createNewFile();
|
|
FileOutputStream fo = new FileOutputStream(file);
|
|
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fo, "UTF-8"));
|
|
|
|
boolean isUnitPresent = false;
|
|
|
|
StringBuffer headerLine = new StringBuffer();
|
|
|
|
headerLine.append("year");
|
|
headerLine.append(CSV_SEPARATOR);
|
|
headerLine.append("value");
|
|
|
|
// first line is csv header, check the type of object
|
|
if(timeSeries.get(0).getUnit() != null && !timeSeries.get(0).getUnit().getClass().equals(Void.class)){
|
|
|
|
isUnitPresent = true;
|
|
headerLine.append(CSV_SEPARATOR);
|
|
headerLine.append("unit");
|
|
|
|
}else{
|
|
// ....nothing
|
|
}
|
|
|
|
bw.write(headerLine.toString());
|
|
bw.newLine();
|
|
bw.flush();
|
|
|
|
// now iterate over the rows.. they are already sorted in ascending order
|
|
for (TimeSeriesBean<T, T1> bean : timeSeries)
|
|
{
|
|
StringBuffer oneLine = new StringBuffer();
|
|
oneLine.append(bean.getYear());
|
|
oneLine.append(CSV_SEPARATOR);
|
|
oneLine.append(bean.getValue());
|
|
|
|
if(isUnitPresent){
|
|
oneLine.append(CSV_SEPARATOR);
|
|
oneLine.append(bean.getUnit() != null? bean.getUnit() : "");
|
|
}
|
|
|
|
bw.write(oneLine.toString());
|
|
bw.newLine();
|
|
bw.flush();
|
|
}
|
|
|
|
// file created
|
|
logger.info("CSV file created correctly on this machine!");
|
|
|
|
bw.close();
|
|
|
|
// on exit delete it...
|
|
file.deleteOnExit();
|
|
return file;
|
|
}
|
|
catch(Exception e){
|
|
logger.error("Failed to create csv file for time series", e);
|
|
return null;
|
|
}
|
|
}
|
|
}
|