Bug 121111 Bad event handler class name does not cause an error
Open a report design, open any Data Set's Property editor. Type in an invalid Java class name for the "Event Handler Class" property, say "aaa". Preview a report that uses that Data Set. The report executes normally. No error is shown. Event handlers are an integral part of a report design, and if a script handler class is not found, or if the handler throws a runtime exception, Report Engine should either stop the report execution, or show the error message in the generated report. (Tested with the 2005-12-15 nightly build)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/script/internal/TextItemScriptExecutor.java
private static void internalOnRender( AbstractContent content,
			ExecutionContext context )
	{
		try
		{
			ReportItemDesign textItemDesign = ( ReportItemDesign ) content
					.getGenerateBy( );
			ITextItemInstance textItem = null;
			if ( content instanceof TextContent )
				textItem = new TextItemInstance( ( TextContent ) content,
						context );
			else if ( content instanceof ForeignContent )
				textItem = new TextItemInstance( ( ForeignContent ) content,
						context );
			if ( handleJS( textItem, textItemDesign.getOnRender( ), context )
					.didRun( ) )
				return;
			ITextItemEventHandler eh = ( ITextItemEventHandler ) getInstance( ( TextItemHandle ) textItemDesign
					.getHandle( ) );
			if ( eh != null )
			{
				eh.onRender( textItem, context.getReportContext( ) );
			}
		} catch ( Exception e )
		{
			log.log( Level.WARNING, e.getMessage( ), e );
		}
	}
}