How to introduce the page break after pre-defined number of rows in the jr:table component? - jasper-reports

Question

I am using jasper report version 6.1 and wanted page break after pre-defined number of rows in the jr:table component. I have also tried doing the same in version 5 and it works fine but in version 6+ I am not able to do it.
Sharing the links which I followed if any one have other solution please let me know.
http://community.jaspersoft.com/wiki/ireport-how-introduce-page-break-after-pre-defined-number-rows-table-component
http://community.jaspersoft.com/questions/845487/inserting-break-table-print-only-10-rows-page-jasper-reports-372
This is what I have tried:
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.1.0.final using JasperReports Library version 6.1.0 -->
<!-- 2017-05-29T15:29:33 -->
<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="Blank_A4_4" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="957c1fea-8994-4195-9d7a-2bbf0baf7180">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Max apex"/>
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="Dataset1" uuid="435d51b0-6d3e-442e-9a96-ae7412b12278">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Max apex"/>
<queryString>
<![CDATA[select * from dept]]>
</queryString>
<field name="DEPTNO" class="java.math.BigDecimal"/>
<field name="DNAME" class="java.lang.String"/>
<field name="LOC" class="java.lang.String"/>
<group name="DEPTNO">
<groupExpression><![CDATA[$F{DEPTNO}]]></groupExpression>
</group>
<group name="DNAME">
<groupExpression><![CDATA[$F{DNAME}]]></groupExpression>
</group>
<group name="LOC">
<groupExpression><![CDATA[$F{LOC}]]></groupExpression>
</group>
</subDataset>
<queryString>
<![CDATA[select * from dept]]>
</queryString>
<field name="DEPTNO" class="java.math.BigDecimal"/>
<field name="DNAME" class="java.lang.String"/>
<field name="LOC" class="java.lang.String"/>
<group name="DEPTNO">
<groupExpression><![CDATA[$F{DEPTNO}]]></groupExpression>
</group>
<group name="DNAME">
<groupExpression><![CDATA[$F{DNAME}]]></groupExpression>
</group>
<group name="LOC">
<groupExpression><![CDATA[$F{LOC}]]></groupExpression>
</group>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="79" splitType="Stretch"/>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="61" splitType="Stretch"/>
</columnHeader>
<detail>
<band height="145" splitType="Stretch">
<componentElement>
<reportElement positionType="FixRelativeToBottom" x="10" y="0" width="500" height="110" uuid="b37c89ae-600a-4fb8-ac64-e142bfe22e13"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="Dataset1" uuid="8f84378b-9508-4763-8265-69e68c41febe">
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column width="100" uuid="00a00921-f5fa-4352-924c-f0531c919f71">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="d88580f8-05d2-4eb0-a098-00e877c58c39"/>
<text><![CDATA[DEPTNO]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="90" height="30" uuid="15fda94a-b686-4808-b55c-3e08a8e86187"/>
<textFieldExpression><![CDATA[$F{DEPTNO}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="140" uuid="72e58aec-00f1-4937-8600-b32a6010d4d6">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="130" height="30" uuid="942c89ca-e914-4809-bb18-3b7065b413f7"/>
<text><![CDATA[DNAME]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="130" height="30" uuid="8b936e63-5f84-4fd7-b21c-8c08fb9550a5"/>
<textFieldExpression><![CDATA[$F{DNAME}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="140" uuid="f312cbac-4554-492c-928f-dd84b5a55d42">
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="120" height="30" uuid="ce385917-88aa-4e51-9cae-a7a142f78323"/>
<text><![CDATA[LOC]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="120" height="30" uuid="0e43f425-558c-4001-9c44-ca14798bcb75"/>
<textFieldExpression><![CDATA[$F{LOC}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>

Answer 1

The solution to use a a group expression inside the subdatset works perfectly fine also in jasper reports v6+.
Example (built from code and data from this answer)
Adding groupExpression to the subDataset to break to new page every 2 records ($V{REPORT_COUNT}-1)/2)
<subDataset name="tableDataset" uuid="7a53770f-0350-4a73-bfc1-48a5f6386594">
<field name="User" class="java.lang.String"/>
<field name="Rep" class="java.math.BigDecimal"/>
<group name="pageBreakGroup" isStartNewPage="true">
<groupExpression><![CDATA[(int)(($V{REPORT_COUNT}-1)/2)]]></groupExpression>
</group>
</subDataset>
Expand code snippet for full code.
<?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="reputation" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="a88bd694-4f90-41fc-84d0-002b90b2d73e">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="CVS"/>
<style name="table">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="tableDataset" uuid="7a53770f-0350-4a73-bfc1-48a5f6386594">
<field name="User" class="java.lang.String"/>
<field name="Rep" class="java.math.BigDecimal"/>
<group name="pageBreakGroup" isStartNewPage="true">
<groupExpression><![CDATA[(int)(($V{REPORT_COUNT}-1)/2d)]]></groupExpression>
</group>
</subDataset>
<parameter name="displayRecordNumber" class="java.lang.Boolean">
<defaultValueExpression><![CDATA[true]]></defaultValueExpression>
</parameter>
<queryString>
<![CDATA[]]>
</queryString>
<title>
<band height="50">
<componentElement>
<reportElement key="table" style="table" x="0" y="0" width="555" height="47" uuid="76ab08c6-e757-4785-a43d-b65ad4ab1dd5"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="tableDataset" uuid="07e5f1c2-af7f-4373-b653-c127c47c9fa4">
<dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression>
</datasetRun>
<jr:column width="90" uuid="918270fe-25c8-4a9b-a872-91299cddbc31">
<printWhenExpression><![CDATA[$P{displayRecordNumber}]]></printWhenExpression>
<jr:columnHeader style="table_CH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="90" height="30" uuid="5cd6da41-01d5-4f74-99c2-06784f891d1e"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Record number]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table_TD" height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="30" uuid="5fe48359-0e7e-44b2-93ac-f55404189832"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$V{REPORT_COUNT}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="7979d8a2-4e3c-42a7-9ff9-86f8e0b164bc">
<jr:columnHeader style="table_CH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="90" height="30" uuid="61d5f1b6-7677-4511-a10c-1fb8a56a4b2a"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Username]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table_TD" height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="30" uuid="a3cdb99d-3bf6-4c66-b50c-259b9aabfaef"/>
<box leftPadding="3" rightPadding="3"/>
<textElement verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{User}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="625e4e5e-5057-4eab-b4a9-c5b22844d25c">
<jr:columnHeader style="table_CH" height="30" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="90" height="30" uuid="e1c07cb8-a44c-4a8d-8566-5c86d6671282"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Reputation]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="table_TD" height="30" rowSpan="1">
<textField pattern="#,##0">
<reportElement x="0" y="0" width="90" height="30" uuid="6be2d79f-be82-4c7b-afd9-0039fb8b3189"/>
<box leftPadding="3" rightPadding="3"/>
<textElement textAlignment="Right" verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{Rep}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</title>
</jasperReport>
Result in JasperStudio version 6.2
As you can see 3 pages (2 records on each, total record count 5).