[plot timeSeriex chart with multipleDataSet OR pass a Collection Object in JRBeanCollectionDataSource]

Acually I have to plot timeSeries using jasperReport . How to generate the time series graph for different data sets? I am able to generate the time series graph when i have one data set to plot over a period of time. However when i have multiple data set to plot then i am facing problem.

 

I am using List data source.

 

    public class KpiReportPoints {

        private String deviceDn;

        private List<KpiReportPoint> kpiPoints;

    }

    

    public class KPiReportPoint{

        private Date time;

        private Double value;

    

    public Date getTime() {

          

          return time;

       }

    

       

       /**

        * @param time the time to set

        */

       public void setTime(Date time) {

          this.time = time;

       }

    

       

       /**

        * @return the value

        */

       public Double getValue() {

          return value;

       }

    

       

       /**

        * @param value the value to set

        */

       public void setValue(Double value) {

          this.value = value;

       }

    

       @Override

       public int hashCode() {

          return time.hashCode();

       }

    

       @Override

       public boolean equals(Object obj) {

          boolean equal = false;

          if (obj instanceof KPIReportPoint){

             KPIReportPoint point  = (KPIReportPoint) obj;

             equal = time.equals(point.getTime())&& value.equals(point.getValue());

          }

          return equal;

       }

       

       @Override

       public int compareTo(KPIReportPoint o) {

          return this.time.compareTo(o.getTime());

       }

    

    }

 

Both the above classes have their getters and setters and all are public ,so no problem according to me is there in the definition of each. I am passing the populated List<KpiReportPoints> as JRBEanCollectionDataSource(kpiReportpointsList)

 

Now below is my 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="KPI_Reports" pageWidth="842" pageHeight="595" orientation="Landscape" columnWidth="802" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">

    <property name="ireport.zoom" value="1.0"/>

    <property name="ireport.x" value="0"/>

    <property name="ireport.y" value="191"/>

    <subDataset name="Dataset">

    <field name="time" class="java.util.Date"/>

    <field name="value" class="java.lang.Double"/>

    </subDataset>

    <parameter name="X_UNIT" class="java.lang.String">

    <parameterDescription><![CDATA[]]></parameterDescription>

    <defaultValueExpression><![CDATA["Date"]]></defaultValueExpression>

    </parameter>

    <parameter name="Y_UNIT" class="java.lang.String">

    <parameterDescription><![CDATA[]]></parameterDescription>

    <defaultValueExpression><![CDATA["%"]]></defaultValueExpression>

    </parameter>

    <parameter name="REPORT_NAME" class="java.lang.String">

    <defaultValueExpression><![CDATA["KPI Report"]]></defaultValueExpression>

    </parameter>

    <parameter name="from" class="java.util.Date"/>

    <parameter name="to" class="java.util.Date"/>

    <field name="deviceDn" class="java.lang.String"/>

    <field name="kpiPoints" class="java.util.List"/>

    <background>

    <band splitType="Stretch"/>

    </background>

    <title>

    <band height="20" splitType="Stretch">

    <textField pattern="EEE, d MMM yyyy HH:mm:ss Z" isBlankWhenNull="true">

    <reportElement x="513" y="0" width="253" height="20"/>

    <textElement/>

    <textFieldExpression><![CDATA[new java.util.Date()]]></textFieldExpression>

    </textField>

    </band>

    </title>

    <summary>

    <band height="443">

    <timeSeriesChart>

    <chart isShowLegend="true" customizerClass="com.ipaccess.nos.business.pm.impl.KPIChartCustomizer">

    <reportElement mode="Opaque" x="0" y="0" width="766" height="443" isPrintInFirstWholeBand="true"/>

    <chartTitle position="Top">

    <font size="14" isBold="true" pdfFontName="Courier-Bold" isPdfEmbedded="true"/>

    <titleExpression><![CDATA[$P{REPORT_NAME}]]></titleExpression>

    </chartTitle>

    <chartSubtitle/>

    <chartLegend position="Bottom"/>

    </chart>

    <timeSeriesDataset timePeriod="Second">

                        <datasetRun subDataset="Dataset">

                            <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{kpiPoints})]]></dataSourceExpression>

                        </datasetRun>

    <timeSeries>

    <seriesExpression><![CDATA[$F{deviceDn}]]></seriesExpression>

    <timePeriodExpression><![CDATA[$F{time}]]></timePeriodExpression>

    <valueExpression><![CDATA[$F{value}]]></valueExpression>

    </timeSeries>

    </timeSeriesDataset>

    <timeSeriesPlot isShowLines="true" isShowShapes="true">

    <plot labelRotation="90.0"/>

    <timeAxisLabelExpression><![CDATA[$P{X_UNIT}]]></timeAxisLabelExpression>

    <valueAxisLabelExpression><![CDATA[$P{Y_UNIT}]]></valueAxisLabelExpression>

    <valueAxisFormat>

    <axisFormat>

    <labelFont>

    <font size="10"/>

    </labelFont>

    </axisFormat>

    </valueAxisFormat>

    <domainAxisMinValueExpression><![CDATA[$P{from}]]></domainAxisMinValueExpression>

    <domainAxisMaxValueExpression><![CDATA[$P{to}]]></domainAxisMaxValueExpression>

    </timeSeriesPlot>

    </timeSeriesChart>

    </band>

    </summary>

    </jasperReport>

 

This issue is jrxml compiles fine but on trying to generate a report it throws the exception :

 

    [#|2014-10-10T09:59:05.769+0530|SEVERE|glassfish3.1.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=290;_ThreadName=Thread-3;|net.sf.jasperreports.engine.JRException: Error retrieving field value from bean : time

            at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDataSource.java:127)

            at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getFieldValue(JRAbstractBeanDataSource.java:100)

            at net.sf.jasperreports.engine.data.JRBeanCollectionDataSource.getFieldValue(JRBeanCollectionDataSource.java:104)

        at net.sf.jasperreports.engine.fill.JRFillData

 

I have been completely mad with this issue and not able to find even a single problem in the above code which may cause this . If any of you is able to see that and have any time faced this error then please give me some clue as to what is wrong . Thanks a lot in advance 

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