I need to generate multiple charts in a report given a `List<List<ChartBean<Double,Double>>` which is populated with the data I get from a file. ChartBean is declared as follows: public class ChartBean<T,U> { T xCoordinate; U yCoordinate; String series; public ChartBean(T x,U y,String series) { this.xCoordinate = x; this.yCoordinate = y; this.series = series; } public void setxCoordinate(T x) { this.xCoordinate = x; } public void setyCoordinate(U y) { this.yCoordinate = y; } public T getxCoordinate() { return xCoordinate; } public U getyCoordinate() { return yCoordinate; } public String setseries() { return series; } public String getseries() { return series; } }[/code]I pass the parameters to the template generator in the following way `parameters.put("XYDataSource", values);` , where values contains the list of list of coordinates. What I get is that my application hangs and does not generate any report. I checked multiple times the content of the XML and it seems in line with what is described in the post. I tried also to generate one chart (without using list of lists) and it works. I have a top report whose summary band contains a sub report "sub_charts.xml". In its detail band I put another subreport which contains the line chart and I use the "_THIS" field to pass the `List<ChartBean<Double,Double>` The content of the subreports is reported here. sub_charts.jrxml <?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="subcharts_2" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="97e07501-37b1-4c04-970b-33f120c8264d"> <parameter name="REPORT_DIR" class="java.lang.String"/> <field name="_THIS" class="java.util.List"> <fieldDescription><![CDATA[_THIS]]></fieldDescription> </field> <detail> <band height="359"> <subreport> <reportElement x="22" y="25" width="510" height="320" uuid="6ea2325b-969e-472a-9d49-d5c33667fab5"/> <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{_THIS})]]></dataSourceExpression> <subreportExpression><![CDATA[$P{REPORT_DIR}+"/sub_chart.jasper"]]></subreportExpression> </subreport> </band> </detail> </jasperReport> sub_chart.jrxml <?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="subchart_2" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="6cdd6eb2-73da-4026-823b-574910e37c68"> <field name="series" class="java.lang.String"/> <field name="xCoordinate" class="java.lang.Double"/> <field name="yCoordinate" class="java.lang.Double"/> <summary> <band height="270"> <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/> <xyLineChart> <chart evaluationTime="Report"> <reportElement isPrintRepeatedValues="false" x="0" y="0" width="555" height="270" uuid="4bfd2379-7617-47fb-9c2a-4eeb0b72eadf"/> <chartTitle/> <chartSubtitle/> <chartLegend/> </chart> <xyDataset> <xySeries autoSort="true"> <seriesExpression><![CDATA[$F{series}]]></seriesExpression> <xValueExpression><![CDATA[$F{xCoordinate}]]></xValueExpression> <yValueExpression><![CDATA[$F{yCoordinate}]]></yValueExpression> </xySeries> </xyDataset> <linePlot> <plot/> <categoryAxisFormat> <axisFormat labelColor="#000000" tickLabelColor="#000000" axisLineColor="#000000"/> </categoryAxisFormat> <valueAxisFormat> <axisFormat labelColor="#000000" tickLabelColor="#000000" axisLineColor="#000000"/> </valueAxisFormat> </linePlot> </xyLineChart> </band> </summary> </jasperReport>
