subreport

You can pass datasource via the built-in REPORT_DATA_SOURCE parameter. The example: <subreport> <reportElement x=”261″ y=”25″ width=”200″ height=”100″/> <dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression> <subreportExpression><![CDATA[$P{SUBREPORT_DIR} + “subreport.jasper”]]></subreportExpression> </subreport> You can create new instance of datasource based on variable, parameter or field. The sample: <variable name=”HeadingsCollection” class=”java.util.Collection” calculation=”System”> <initialValueExpression><![CDATA[new java.util.ArrayList()]]></initialValueExpression> </variable> … <subreport> <reportElement x=”0″ y=”0″ width=”515″ height=”20″/> <subreportParameter name=”ReportTitle”> <subreportParameterExpression><![CDATA[$P{ReportTitle}]]></subreportParameterExpression> </subreportParameter> … Read more