Extract interface for DataSeries

This will make it possible to have DataSeries that do not require a csv
file on disk.

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/AggregateHandler.java

@@ -6,6 +6,8 @@ import org.lucares.recommind.logs.DataSeries;
 
 public interface AggregateHandler {
 	
+	// TODO handle aggregates as normal DataSeries
+	
 	void addGnuplotDefinitions(StringBuilder result, String separator, Collection<DataSeries> dataSeries);
 	
 	default void appendfln(final StringBuilder builder, final String format, final Object... args) {

pdb-plotting/src/main/java/org/lucares/pdb/plot/api/MeanAggregate.java

@@ -3,30 +3,32 @@ package org.lucares.pdb.plot.api;
 import java.util.Collection;
 
 import org.lucares.recommind.logs.DataSeries;
+import org.lucares.recommind.logs.FileBackedDataSeries;
 
 public class MeanAggregate implements AggregateHandler{
 
-	
-
 	@Override
 	public void addGnuplotDefinitions(StringBuilder result, String separator, Collection<DataSeries> dataSeries) {
 		int count = 1;
 		for (final DataSeries dataSerie : dataSeries) {
-			
-			appendfln(result, "stats '%s' using 2 prefix \"A%d\"", dataSerie.getDataFile(),count);
+			if (dataSerie instanceof FileBackedDataSeries){
+				appendfln(result, "stats '%s' using 2 prefix \"A%d\"", ((FileBackedDataSeries) dataSerie).getDataFile(),count);
 				count++;
 			}
 		}
+	}
 
 	@Override
 	public void addPlots(StringBuilder result, Collection<DataSeries> dataSeries) {
 		int count = 1;
 		for (final DataSeries dataSerie : dataSeries) {
+			if (dataSerie instanceof FileBackedDataSeries){
 				appendfln(result, "A%d_mean title '%s Mean', \\", count,
 						dataSerie.getTitle(), dataSerie.getTitle());
 				count++;
 			}
 		}
+	}
 
 	@Override
 	public CustomAggregator createCustomAggregator(long minDate, long maxDate) {

pdb-plotting/src/main/java/org/lucares/recommind/logs/DataSeries.java

@@ -1,6 +1,5 @@
 package org.lucares.recommind.logs;
 
-import java.io.File;
 import java.util.Comparator;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -9,7 +8,7 @@ import java.util.Map;
 import org.lucares.pdb.plot.api.AggregatedData;
 import org.lucares.pdb.plot.api.Limit;
 
-public class DataSeries {
+public interface DataSeries {
 	public static final Comparator<? super DataSeries> BY_NUMBER_OF_VALUES = (
 			a, b) -> {
 		return a.getValues() - b.getValues();
@@ -20,40 +19,15 @@ public class DataSeries {
 		return result < 0 ? -1 : (result > 0 ? 1 : 0);
 	};
 
-	private final String title;
+	public String getId();
 
-	private CsvSummary csvSummary;
+	public String getTitle();
+	public int getValues();
+	public long getMaxValue();
 	
-	private String id;
+	public AggregatedData getAggregatedData();
 	
-	public DataSeries(String id, String title, CsvSummary csvSummary) {
-		this.id = id;
-		this.title = title;
-		this.csvSummary = csvSummary;
-	}
-	public String getId() {
-		return id;
-	}
-	
-	public File getDataFile() {
-		return csvSummary.getDataFile();
-	}
-
-	public String getTitle() {
-		return title;
-	}
-
-	public int getValues() {
-		return csvSummary.getValues();
-	}
-
-	public long getMaxValue() {
-		return csvSummary.getMaxValue();
-	}
-	
-	public AggregatedData getAggregatedData() {
-		return csvSummary.getAggregatedData();
-	}
+	public String getGnuplotPlotDefinition();
 
 	public static Map<String, Integer> toMap(final List<DataSeries> dataSeries) {
 		final Map<String, Integer> result = new LinkedHashMap<>();

pdb-plotting/src/main/java/org/lucares/recommind/logs/FileBackedDataSeries.java

@@ -0,0 +1,48 @@
+package org.lucares.recommind.logs;
+
+import java.io.File;
+
+import org.lucares.pdb.plot.api.AggregatedData;
+
+public class FileBackedDataSeries implements DataSeries {
+
+	private final String title;
+
+	private CsvSummary csvSummary;
+
+	private String id;
+
+	public FileBackedDataSeries(String id, String title, CsvSummary csvSummary) {
+		this.id = id;
+		this.title = title;
+		this.csvSummary = csvSummary;
+	}
+	public String getId() {
+		return id;
+	}
+	
+	public File getDataFile() {
+		return csvSummary.getDataFile();
+	}
+
+	public String getTitle() {
+		return title;
+	}
+
+	public int getValues() {
+		return csvSummary.getValues();
+	}
+
+	public long getMaxValue() {
+		return csvSummary.getMaxValue();
+	}
+	
+	public AggregatedData getAggregatedData() {
+		return csvSummary.getAggregatedData();
+	}
+	@Override
+	public String getGnuplotPlotDefinition() {
+		return String.format("'%s' using 1:2 title '%s' with points, \\", getDataFile(),
+					getTitle());
+	}
+}

pdb-plotting/src/main/java/org/lucares/recommind/logs/GnuplotFileGenerator.java

@@ -62,8 +62,7 @@ public class GnuplotFileGenerator {
 		appendf(result, "plot ");
 		
 		for (final DataSeries dataSerie : dataSeries) {
-			appendfln(result, "'%s' using 1:2 title '%s' with points, \\", dataSerie.getDataFile(),
-					dataSerie.getTitle());
+			appendfln(result, dataSerie.getGnuplotPlotDefinition());
 		}
 		settings.getAggregate().addPlots(result, dataSeries);
 

pdb-plotting/src/main/java/org/lucares/recommind/logs/ScatterPlot.java

@@ -102,7 +102,7 @@ public class ScatterPlot {
 	
 					final int id = idCounter.getAndIncrement();
 					final String title = title(groupResult.getGroupedBy(), csvSummary.getValues());
-					final DataSeries dataSerie = new DataSeries("id"+id, title, csvSummary);
+					final DataSeries dataSerie = new FileBackedDataSeries("id"+id, title, csvSummary);
 					if (dataSerie.getValues() > 0) {
 						dataSeries.add(dataSerie);
 					}