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/api/impl/RunTask.java
services.setReportRunnable( runnable );
		IContentEmitter emitter = new HTMLPaginationEmitter( executor,
				pageHandler, new ReportDocumentEmitter( writer ) );
		
		emitter.initialize( services );
		return emitter;
	}
	/**
	 * runs the report
	 * 
	 * @throws EngineException
	 *             throws exception when there is a run error
	 */
	protected void doRun( ) throws EngineException
	{
		ReportDesignHandle reportDesign = executionContext.getDesign( );
		
		if ( !validateParameters( ) )
		{
			throw new EngineException(
					MessageConstants.INVALID_PARAMETER_EXCEPTION ); 
		}
		loadDesign( );
		prepareDesign( );
		startFactory( );
		openReportDocument( );
		try
		{
			ReportExecutor executor = new ReportExecutor( executionContext );
			executionContext.setExecutor( executor );