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/RowScriptExecutor.java
IRowEventHandler eh = ( IRowEventHandler ) getInstance( ( RowHandle ) rowDesign
					.getHandle( ) );
			if ( eh != null )
				eh.onCreate( row, rowData, context.getReportContext( ) );
		} catch ( Exception e )
		{
			log.log( Level.WARNING, e.getMessage( ), e );
		}
	}
	public static void handleOnRender( RowContent content, IRowData rowData,
			ExecutionContext context )
	{
		try
		{
			ReportItemDesign rowDesign = ( ReportItemDesign ) content
					.getGenerateBy( );
			IRowInstance row = new RowInstance( content, context );
			if ( handleJS( row, rowDesign.getOnRender( ), context ).didRun( ) )
				return;
			IRowEventHandler eh = ( IRowEventHandler ) getInstance( ( RowHandle ) rowDesign
					.getHandle( ) );
			if ( eh != null )
				eh.onRender( row, context.getReportContext( ) );
		} catch ( Exception e )
		{
			log.log( Level.WARNING, e.getMessage( ), e );
		}
	}
}