add histogram plots

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

@@ -10,7 +10,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 public class AxisSettings {
 
     public enum Type {
-        Number, Time, Duration, Percent
+        Number, Time, Duration, Percent, HistogramBin, HistogramCount
     }
 
     private String format = "";
@@ -38,7 +38,7 @@ public class AxisSettings {
         return format;
     }
 
-    public void setFormat(String format) {
+    public void setFormat(final String format) {
         this.format = format;
     }
 
@@ -46,7 +46,7 @@ public class AxisSettings {
         return label;
     }
 
-    public void setLabel(String label) {
+    public void setLabel(final String label) {
         this.label = label;
     }
 
@@ -54,7 +54,7 @@ public class AxisSettings {
         return rotateLabel;
     }
 
-    public void setRotateLabel(int rotateLabel) {
+    public void setRotateLabel(final int rotateLabel) {
         this.rotateLabel = rotateLabel;
     }
 
@@ -62,7 +62,7 @@ public class AxisSettings {
         return from;
     }
 
-    public void setFrom(String from) {
+    public void setFrom(final String from) {
         this.from = from;
     }
 
@@ -70,7 +70,7 @@ public class AxisSettings {
         return to;
     }
 
-    public void setTo(String to) {
+    public void setTo(final String to) {
         this.to = to;
     }
 
@@ -78,7 +78,7 @@ public class AxisSettings {
         return type;
     }
 
-    public void setType(Type type) {
+    public void setType(final Type type) {
         this.type = type;
     }
 
@@ -86,11 +86,11 @@ public class AxisSettings {
         return axis;
     }
 
-    public void setAxis(GnuplotAxis axis) {
+    public void setAxis(final GnuplotAxis axis) {
         this.axis = axis;
     }
 
-    public void setTicIncrement(double ticIncrement) {
+    public void setTicIncrement(final double ticIncrement) {
         this.ticIncrement = ticIncrement;
     }
 
@@ -98,7 +98,7 @@ public class AxisSettings {
         return ticIncrement;
     }
 
-    public void setTicsEnabled(boolean ticsEnabled) {
+    public void setTicsEnabled(final boolean ticsEnabled) {
         this.ticsEnabled = ticsEnabled;
     }
 
@@ -106,7 +106,7 @@ public class AxisSettings {
         return ticsEnabled;
     }
 
-    public void setLogscale(boolean logscale) {
+    public void setLogscale(final boolean logscale) {
         this.logscale = logscale;
     }
 
@@ -114,7 +114,7 @@ public class AxisSettings {
         return logscale;
     }
 
-    public void setTics(List<String> ticsLabels) {
+    public void setTics(final List<String> ticsLabels) {
         this.ticsLabels = ticsLabels;
     }
 
@@ -122,8 +122,8 @@ public class AxisSettings {
         return ticsLabels;
     }
 
-    public String toGnuplotDefinition(boolean renderLabels) {
-        StringBuilder result = new StringBuilder();
+    public String toGnuplotDefinition(final boolean renderLabels) {
+        final StringBuilder result = new StringBuilder();
         if (type == Type.Time) {
             appendfln(result, "set %sdata time", axis);
         }
@@ -171,10 +171,10 @@ public class AxisSettings {
 
     @Override
     public String toString() {
-        ObjectMapper mapper = new ObjectMapper();
+        final ObjectMapper mapper = new ObjectMapper();
         try {
             return mapper.writeValueAsString(this);
-        } catch (JsonProcessingException e) {
+        } catch (final JsonProcessingException e) {
             return e.getMessage();
         }
     }

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

@@ -24,7 +24,7 @@ public class GnuplotFileGenerator implements Appender {
         appendfln(result, "set timefmt '%s'", settings.getTimefmt());
 
         final List<AxisSettings> xAxisDefinitions = settings.getAggregates().getXAxisDefinitions(settings, dataSeries);
-        for (AxisSettings axisSettings : xAxisDefinitions) {
+        for (final AxisSettings axisSettings : xAxisDefinitions) {
             appendln(result, axisSettings.toGnuplotDefinition(settings.isRenderLabels()));
         }
 
@@ -34,10 +34,9 @@ public class GnuplotFileGenerator implements Appender {
             // Workaround is to explicitly specify the y-axis range.
             // We choose a range for which no ticks are defined. This creates an empty
             // y-axis.
-            yAxisDefinitions.forEach(s -> s.setFrom("0"));
             yAxisDefinitions.forEach(s -> s.setFrom("-1"));
         }
-        for (AxisSettings axisSettings : yAxisDefinitions) {
+        for (final AxisSettings axisSettings : yAxisDefinitions) {
             appendln(result, axisSettings.toGnuplotDefinition(settings.isRenderLabels()));
         }