Pagination in bar chart with series - jasper-reports

Question

I have to create a bar chart which can have a large amount (around 50) of categories (X Axis). I wish to split this report into multiple pages so that I can apply pagination. I have found an answer here:
How can I generate paginated bar chart in jasper report
But the above answer discusses a bar chart with single series.
Following is a sample report which I intend to create:
Assuming we have around 50 dates in X axis, the report will become large. So I have to break this report such that I am showing a configurable amount (say 3) of categories per page. Following is my approach:
Create a group of date field
Create a variable which counts this group.
Create another group with groupExpression $V{variable1} - 1 - ( ($V{variable1} - 1) % 3 )
Following is the jrxml file:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="paginationBar3d" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="a9331cff-3045-47b5-8399-17a89e2ac39c">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<queryString>
<![CDATA[select a.year_built, aty.description, count(*) as count
from aircraft a, aircraft_types aty
where a.aircraft_type_id = aty.aircraft_type_id
group by year_built, description order by a.year_built;]]>
</queryString>
<field name="year_built" class="java.sql.Date">
<fieldDescription><![CDATA[]]></fieldDescription>
</field>
<field name="description" class="java.lang.String">
<fieldDescription><![CDATA[]]></fieldDescription>
</field>
<field name="count" class="java.lang.Long"/>
<variable name="variable1" class="java.lang.Integer" incrementType="Group" incrementGroup="yearGroup" calculation="Count">
<variableExpression><![CDATA[Boolean.TRUE]]></variableExpression>
</variable>
<group name="yearGroup">
<groupExpression><![CDATA[$F{year_built}]]></groupExpression>
</group>
<group name="splitter">
<groupExpression><![CDATA[$V{variable1} - 1 - ( ($V{variable1} - 1) % 3)]]></groupExpression>
<groupFooter>
<band height="802">
<bar3DChart>
<chart>
<reportElement uuid="7114e305-2cfb-4757-b034-b0a12dd412d9" x="0" y="0" width="555" height="802"/>
<chartTitle/>
<chartSubtitle/>
<chartLegend/>
</chart>
<categoryDataset>
<dataset resetType="Group" resetGroup="splitter"/>
<categorySeries>
<seriesExpression><![CDATA[$F{description}]]></seriesExpression>
<categoryExpression><![CDATA[$F{year_built}]]></categoryExpression>
<valueExpression><![CDATA[$F{count}]]></valueExpression>
</categorySeries>
</categoryDataset>
<bar3DPlot>
<plot/>
<itemLabel/>
<categoryAxisFormat>
<axisFormat/>
</categoryAxisFormat>
<valueAxisFormat>
<axisFormat/>
</valueAxisFormat>
</bar3DPlot>
</bar3DChart>
</band>
</groupFooter>
</group>
</jasperReport>
This generates a single category per page. What should be the correct approach in this scenario?

Answer 1

This can be done using Reports Group, I have done it earlier ,
You can try this Link :-
Split a chart in to multiple pages
and just replace
$V{REPORT_COUNT} - 1 - ( ($V{REPORT_COUNT} - 1) % 3 )
with
$V{REPORT_COUNT} - 1 - ( ($V{REPORT_COUNT} - 1) % 18 )

Answer 2

The above report works as intended if I define yearGroup after splitter. I am not sure how ordering of groups matter.