add interval splitting for bar charts

pdb-ui/src/main/java/org/lucares/pdbui/PlotSettingsTransformer.java

@@ -7,6 +7,7 @@ import org.lucares.pdb.plot.api.AggregateHandlerCollection;
 import org.lucares.pdb.plot.api.BarChartHandler;
 import org.lucares.pdb.plot.api.CumulativeDistributionHandler;
 import org.lucares.pdb.plot.api.HistogramHandler;
+import org.lucares.pdb.plot.api.Interval;
 import org.lucares.pdb.plot.api.ParallelRequestsAggregate;
 import org.lucares.pdb.plot.api.PlotSettings;
 import org.lucares.pdb.plot.api.ScatterAggregateHandler;
@@ -33,6 +34,7 @@ class PlotSettingsTransformer {
         result.setY1(request.getY1());
         result.setY2(request.getY2());
         result.setAggregates(toAggregateInternal(request.getY1(), request.getY2(), request.getAggregates()));
+        result.setInterval(Interval.create(request.getIntervalUnit(), request.getIntervalValue(), result.dateRange()));
 
         return result;
     }

pdb-ui/src/main/java/org/lucares/pdbui/domain/PlotRequest.java

@@ -34,6 +34,8 @@ public class PlotRequest {
     private boolean keyOutside;
 
     private boolean generateThumbnail;
+    private String intervalUnit;
+    private int intervalValue;
 
     public String getQuery() {
         return query;
@@ -151,4 +153,20 @@ public class PlotRequest {
     public void setY2(final YAxisDefinition y2) {
         this.y2 = y2;
     }
+
+    public String getIntervalUnit() {
+        return intervalUnit;
+    }
+
+    public void setIntervalUnit(final String intervalUnit) {
+        this.intervalUnit = intervalUnit;
+    }
+
+    public int getIntervalValue() {
+        return intervalValue;
+    }
+
+    public void setIntervalValue(final int intervalValue) {
+        this.intervalValue = intervalValue;
+    }
 }