javaspringspring-bootjasper-reports

Access non-static methods from Jasper reports


I was recently tasked to clean an old repo which includes the following Jasper report:

<?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="Main Report" pageWidth="842" pageHeight="595" orientation="Landscape" whenNoDataType="AllSectionsNoDetail" columnWidth="802" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="4123fb0b-673b-4db3-9fe3-29adda726395">
    <import value="org.thmasker.jasper.accessor.StatusJasperAccessor"/>
    <columnHeader>
        <band height="25" splitType="Stretch">
            <property name="com.jaspersoft.studio.unit.height" value="px"/>
            <staticText>
                <reportElement mode="Opaque" x="339" y="0" width="84" height="20" forecolor="#FFFFFF" backcolor="#0D9DDB" uuid="44984c48-65ae-4d88-afb1-5567a8ff122d">
                    <property name="net.sf.jasperreports.export.xls.auto.fit.column" value="true"/>
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                    <property name="com.jaspersoft.studio.unit.y" value="px"/>
                    <property name="com.jaspersoft.studio.unit.x" value="px"/>
                </reportElement>
                <box>
                    <pen lineStyle="Solid" lineColor="#0D9DDB"/>
                    <topPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                </box>
                <textElement textAlignment="Center">
                    <font size="8"/>
                </textElement>
                <text><![CDATA[ID #]]></text>
            </staticText>
        </band>
    </columnHeader>
    <detail>
        <band height="15" splitType="Stretch">
            <property name="com.jaspersoft.studio.unit.height" value="px"/>
            <textField textAdjust="StretchHeight">
                <reportElement positionType="Float" stretchType="ElementGroupHeight" x="339" y="-5" width="84" height="15" uuid="8a4cef1f-0fa3-4abf-994f-b0bf11d4a156">
                    <property name="net.sf.jasperreports.export.xls.auto.fit.column" value="true"/>
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                    <property name="com.jaspersoft.studio.unit.x" value="px"/>
                    <property name="com.jaspersoft.studio.unit.leftIndent" value="px"/>
                    <property name="com.jaspersoft.studio.unit.spacingBefore" value="px"/>
                </reportElement>
                <box>
                    <pen lineColor="#0D9DDB"/>
                    <topPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                    <rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#0D9DDB"/>
                </box>
                <textElement verticalAlignment="Justified">
                    <font size="8"/>
                    <paragraph leftIndent="3" spacingBefore="3"/>
                </textElement>
                <textFieldExpression><![CDATA[StatusJasperAccessor.getStatus()]]></textFieldExpression>
            </textField>
        </band>
    </detail>
</jasperReport>

and this is the corresponding StatusJasperAccessor:

@Component
@RequiredArgsConstructor
public class StatusJasperAccessor implements Serializable {

  private static StatusService statusService;

  private final StatusService tStatusService;

  @PostConstruct
  public void init() {
    statusService = tStatusService;
  }

  @Autowired
  public static String getStatus() {
      return statusService.getStatus();
  }

}

Now, I'm trying to get rid of this awful piece of code, but I can't make any alternative work. How can I make this work on the XML file?

@Component
@RequiredArgsConstructor
public class StatusJasperAccessor implements Serializable {

  private final StatusService statusService;

  @Autowired
  public String getStatus() {
      return statusService.getStatus();
  }

}

Solution

  • Found a solution:

    I need to add this in the report XML:

    
    <import value="org.thmasker.jasper.accessor.StatusJasperAccessor"/>
    <parameter name="statusAccessor" class="org.thmasker.jasper.accessor.StatusJasperAccessor"/>
    

    and use it with:

    <textFieldExpression><![CDATA[$P{statusAccessor}.getStatus()]]></textFieldExpression>
    

    Accessor can be:

    @Component
    @RequiredArgsConstructor
    public class StatusJasperAccessor implements Serializable {
    
      private final StatusService statusService;
    
      @Autowired
      public String getStatus() {
          return statusService.getStatus();
      }
    
    }
    

    and I need to also add this bean as a parameter before filling the report:

    @Autowired
    StatusJasperAccessor accessor;
    
    Map<String, Object> params = new HashMap<>();
    params.put("statusAccessor", accessor);
    
    JasperPrint jp = JasperFillManager.fillReport(jasperReport, params, dataSource);