1338241 - getParameterFields method returns null in Crystal Reports for Java

SAP Knowledge Base Article - Public

1338241 - getParameterFields method returns null in Crystal Reports for Java

Symptom

After assigning a reportsource to the viewer, calling the method "getParameterFields()" off of the CrystalReportViewer object returns null (If not caught - it will throw a java.lang.NullPointerException)

Cause

In version 12, a call to processHttpRequest is required before this method will return a value.

Resolution

Instead of using the getParameterFields method off of the viewer object, use the following method:

myReportClientDocument.getDataDefController().getDataDefinition().getParameterFields();

Keywords

KBA , BI-DEV-JAV , BI Software Development Kits (SDKs) - Java , Problem

Product

Crystal Reports for Java 1.0