Nuclos JasperReports scriptlet: JRDefaultScriptlet, Scriptlet Class, $P{REPORT_SCRIPTLET}, extension, jasperreports-6.17.0.jar.

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Scriptlets

Extend report logic with a Java scriptlet – JRDefaultScriptlet, testing in the designer, registration as an extension.

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What are scriptlets?

Scriptlets are custom Java classes that influence the execution of a report/form. For a simple scriptlet, derive from net.sf.jasperreports.engine.JRDefaultScriptlet (empty default methods) and override only the methods you need.

Workflow

Create the scriptlet class and package it as a JAR.
Test the scriptlet in Jaspersoft Studio.
Register the scriptlet in Nuclos as an extension.

Create the scriptlet class

Create a Java library project; keep all your classes in one package.
Use a current JDK.
Add jasperreports-6.17.0.jar and further dependencies.

Test in Jaspersoft Studio

First make the class(es) known to the classpath: Extras → Options → Classpath tab, add the scriptlet JAR (and all dependencies incl. jasperreports-6.17.0.jar) via Add Jar; tick reloadable. For a single scriptlet the full class name in the document property Scriptlet Class is enough. It is called via $P{REPORT_SCRIPTLET}.method() in the image/text expression.

Jaspersoft Studio 6.17.0 has a bug that prevents reports with scriptlets from compiling correctly. Use a different version for testing.

For reports with scriptlets to run in Nuclos, the scriptlets must be registered as server-side extensions.

Related pages

Working with Jasper Studio

Overview.

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Jasper extensions in Nuclos

Register.

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