How to fix "No generic element handlers found for namepsace" error in case using custom genericElement?

Question

I am trying to adapted the example of jasper reports to customized a generic element with a HTML handler to an Example with a PDF handler. But I got all the time the same error message, when trying to run the

net.sf.jasperreports.engine.JRRuntimeException: No generic element handlers found for namespace http://jasperreports.sourceforge.net/jasperreports/customPDFexpoter.
at net.sf.jasperreports.engine.export.GenericElementHandlerEnviroment.getElementHandler(GenericElementHandlerEnviroment.java:112)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportGenericElement(JRPdfExporter.java:4136)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportElements(JRPdfExporter.java:1290)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportPage(JRPdfExporter.java:1210)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:1074)
at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:691)
at com.jaspersoft.studio.editor.preview.actions.export.AExportAction.exportWithProgress(AExportAction.java:223)
at com.jaspersoft.studio.editor.preview.actions.export.AExportAction.doPreview(AExportAction.java:347)
at com.jaspersoft.studio.editor.preview.actions.export.AExportAction$3.run(AExportAction.java:191)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

Also I've followed this example how to embedd a controller to a PDF, without success. Also there the namespace can't be found. Did I miss something in the project configuration?

here is my JRXML:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.14.0.final using JasperReports Library version 6.14.0-2ab0d8625be255bf609c78e1181801213e51db8f  -->
<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" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="c685fd77-7e9f-4762-9a4a-422d1c15aed0">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <background>
        <band splitType="Stretch"/>
    </background>
    <title>
        <band height="500" splitType="Stretch">
            <property name="com.jaspersoft.studio.unit.height" value="px"/>
            <genericElement>
                <reportElement x="94" y="93" width="236" height="107" uuid="0dbdbc2d-cead-47eb-8605-e18cc325259a"/>
                <genericElementType namespace="http://jasperreports.sourceforge.net/jasperreports/customPDFexpoter" name="print"/>
            </genericElement>
        </band>
    </title>
</jasperReport>

My jasperreports_extension.properties (inside src-Folder)

net.sf.jasperreports.extension.registry.factory.jr.statistics=net.sf.jasperreports.extensions.SpringExtensionsRegistryFactory
net.sf.jasperreports.extension.jr.statistics.spring.beans.resource=com/test/beans.xml

The beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="pdfExportHandlerBundle" 
        class="net.sf.jasperreports.engine.export.DefaultElementHandlerBundle">
    <property name="namespace" value="http://jasperreports.sourceforge.net/jasperreports/customPDFexpoter"/>
    <property name="elementHandlers">
        <map>
            <entry key="print">
                <map>
                    <entry key="net.sf.jasperreports.pdf">
                        <ref bean="basePdfExportHandler"/>
                    </entry>
                </map>
            </entry>
        </map>
    </property>
</bean>
<bean id="basePdfExportHandler" class="com.test.TestPDFHandler"
        abstract="true">
</bean>

The Java-File (src/com/test)

package com.test;

import net.sf.jasperreports.engine.JRGenericPrintElement;
import net.sf.jasperreports.engine.JRPropertiesMap;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.export.GenericElementHandler;
import net.sf.jasperreports.engine.export.GenericElementHandlerBundle;
import net.sf.jasperreports.engine.export.GenericElementPdfHandler;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.engine.export.JRPdfExporterContext;
import net.sf.jasperreports.extensions.ExtensionsRegistry;
import net.sf.jasperreports.extensions.ExtensionsRegistryFactory;
import net.sf.jasperreports.extensions.SingletonExtensionRegistry;

import com.lowagie.text.Chunk;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.ColumnText;
import com.lowagie.text.pdf.PdfAction;

public class TestPDFHandler implements GenericElementPdfHandler {

@Override
public boolean toExport(JRGenericPrintElement element) {
    return true;
}

@Override
public void exportElement(JRPdfExporterContext exporterContext,
        JRGenericPrintElement element) {
    Phrase phrase = new Phrase();
    Chunk chunk = new Chunk("print me");
    chunk.setAction(PdfAction.javaScript("this.print(null,this.pageNum,this.pageNum)", exporterContext.getPdfWriter()));
    phrase.add(chunk);

    ColumnText colText = new ColumnText(exporterContext.getPdfWriter().getDirectContent());
    colText.setSimpleColumn(phrase, 
            element.getX(), 
            exporterContext.getExportedReport().getPageHeight() - element.getY(),
            element.getX() + element.getWidth(), 
            exporterContext.getExportedReport().getPageHeight() - element.getY() - element.getHeight(), 
            0, 
            Element.ALIGN_LEFT);

    try {
        colText.go();
    } catch (DocumentException e) {
        throw new JRRuntimeException(e);
    }

}
/*
@Override
public String getNamespace() {
    return "helloWorld";
}

@Override
public GenericElementHandler getHandler(String elementName, String exporterKey) {
    if (elementName.equals("print") && exporterKey.equals(JRPdfExporter.PDF_EXPORTER_KEY)) {
        return this;
    }
    
    return null;
}

@Override
public ExtensionsRegistry createRegistry(String registryId, JRPropertiesMap properties) {
    return new SingletonExtensionRegistry<GenericElementHandlerBundle>(GenericElementHandlerBundle.class, this);
}*/
}

Petter Friberg · Accepted Answer · 2020-11-04T08:50:45.763

You need to register it as a factory in jasperreports_extension.properties add

net.sf.jasperreports.extension.registry.factory.me=com.test.TestPDFHandler

When this is done, then you need to implement the interface that are missing in your TestPDFHandler and getNamespace() needs to correspond with the namespace that you have given to the genericElementType*

public class TestPDFHandler implements GenericElementPdfHandler, GenericElementHandlerBundle, ExtensionsRegistryFactory {

    @Override
    public boolean toExport(JRGenericPrintElement element) {
        return true;
    }

    @Override
    public void exportElement(JRPdfExporterContext exporterContext,
            JRGenericPrintElement element) {
        Phrase phrase = new Phrase();
        Chunk chunk = new Chunk("print me");
        chunk.setAction(PdfAction.javaScript("this.print(null,this.pageNum,this.pageNum)", exporterContext.getPdfWriter()));
        phrase.add(chunk);

        ColumnText colText = new ColumnText(exporterContext.getPdfWriter().getDirectContent());
        colText.setSimpleColumn(phrase,
                element.getX(),
                exporterContext.getExportedReport().getPageHeight() - element.getY(),
                element.getX() + element.getWidth(),
                exporterContext.getExportedReport().getPageHeight() - element.getY() - element.getHeight(),
                0,
                Element.ALIGN_LEFT);

        try {
            colText.go();
        } catch (DocumentException e) {
            throw new JRRuntimeException(e);
        }

    }

    @Override
    public String getNamespace() {
        return "http://jasperreports.sourceforge.net/jasperreports/customPDFexpoter";
    }

    @Override
    public GenericElementHandler getHandler(String elementName, String exporterKey) {
        if (elementName.equals("print") && exporterKey.equals(JRPdfExporter.PDF_EXPORTER_KEY)) {
            return this;
        }

        return null;
    }

    @Override
    public ExtensionsRegistry createRegistry(String registryId, JRPropertiesMap properties) {
        return new SingletonExtensionRegistry<GenericElementHandlerBundle>(GenericElementHandlerBundle.class, this);
    }
}

_{*You can indicate whatever namespace, I would not use http://jasperreports.sourceforge.net/jasperreports/customPDFexpoter since it's not my domain but to follow your code it is used in example below}

Thanks for the replay. but I get still the sam eerror. Did I have to configure something more inside the Project? — carsten, Nov 04 '20 at 11:14
@carsten No nothing more (I tested), check that your factory registration work, for example by setting an incorrect class name net.sf.jasperreports.extension.registry.factory.me=com.test.TestPDFHandlerTestError, jasper should throw error missing class. — Petter Friberg, Nov 04 '20 at 11:58
Do note that your beans settings as indicated in question is not relevant to this problem — Petter Friberg, Nov 04 '20 at 12:00
I guess the Project did not recordzied my jasperreports_extension.properties file. I've set a wrong Class name and still get the error. I've checked the Java Build path and it's point to my src folder. I have created a git Project feel free to have a look at it: https://github.com/Carsten64/my-jasper-report — carsten, Nov 05 '20 at 12:12
@carsten [it works](http://i.stack.imgur.com/cnzt8.png) for me, the difference that I have is that I had to add jar in classpath. I think some of the classes that you have in class-path already have a jasperreports_extension.properties that overrides yours (maybe in the server container or in some fonts-extensions) — Petter Friberg, Nov 06 '20 at 07:48
I can see you are wokring with eclipse direktly. I am wokring with Jaspersoft Studio 6.14. Are there any bigger differences? I also Included JasperReports Library, Jaspersoft Server Library and JasperReports Library Dependencies. — carsten, Nov 06 '20 at 12:12
Ahhhh I got it I had to delete the Jaspersoft Server Libray. now I get the same result. Thanks a lot for your help. — carsten, Nov 06 '20 at 12:16

Samuel Morales · Answer 2 · 2021-05-05T22:00:42.903

0

Im SAM;

Download .JAR jasperreports-htmlcomponent-5.0.1.jar , and save in ANYFOLDER.
With terminal o console typing cd ANYFOLDER
exec on terminal

mvn install:install-file \
-Dfile=jasperreports-htmlcomponent-5.0.1.jar \
-DgroupId=net.sf.jasperreports \
-DartifactId=jasperreports-htmlcomponent \
-Dversion=5.0.1 \
-Dpackaging=jar  \
-DgeneratePom=true

GO TO PROJECT in pom.xml

 <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports-htmlcomponent</artifactId>
            <version>5.0.1</version>
        </dependency>

compile.
Ready ...Enjoy.

edited May 05 '21 at 22:00

answered May 05 '21 at 01:49

Samuel Morales

21
2

Work only Maven >3.6.1 – Samuel Morales May 05 '21 at 22:01
download JAR on http://maven.cantabria.es/artifactory/amap/net/sf/jasperreports/jasperreports-htmlcomponent/5.0.1/ – Samuel Morales May 06 '21 at 00:23

How to fix "No generic element handlers found for namepsace" error in case using custom genericElement?

2 Answers2